Temperature and vibration coupled controller and method based on additive manufacturing of shape memory alloy porous structures

Abstract

The application discloses a temperature and vibration coupling controller and method based on an additive manufacturing shape memory alloy porous structure, which comprises a shell, a movable object table, a shape memory alloy porous structure, a cooling device and a heating device, the shell is respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are communicated through a ventilation flow channel; the shape memory alloy porous structure is arranged in the ventilation flow channel; the shape memory alloy porous structure is provided with the cooling device and the heating device, the cooling device and the heating device are loaded through the shell, the cooling device can transfer a cold source to the shape memory alloy porous structure, and the heating device can transfer a heat source to the heating device; the movable object table is assembled on the shell and faces the position of the shape memory alloy porous structure, and the movable object table can be connected with a protected device to form an integrated whole. Therefore, the application can realize the control of the heat dissipation flow resistance of the protected device and the variable stiffness broadband vibration reduction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerospace thermal management and vibration control, and particularly relates to a temperature and vibration coupling controller and method based on a shape memory alloy porous structure manufactured by additive manufacturing. BACKGROUND

[0002] In the field of aerospace, a high-speed aircraft will be subjected to a complex and severe vibration and thermal environment during the entire process of launching, flying and re-entering, such as jet noise of an engine during launching, aerodynamic noise and frictional heating during flying, aerodynamic heating and rolling resonance during re-entry into the atmosphere. The complex thermal and vibration load not only aggravates structural damage, but also affects the failure and misalignment of internal precision instruments of the aircraft. In addition, the aircraft needs to have a large cruising range and high maneuverability while ensuring a very high flight speed, which poses a severe challenge to lightweight design of the aircraft structure system. Therefore, it is very important to design and develop a multifunctional lightweight coupling component with excellent thermal control and vibration reduction effect.

[0003] At present, vibration reduction methods can be divided into two ways: vibration isolation and vibration absorption. Vibration isolation is to add a vibration isolator composed of a spring-damping element between a vibration source and a device to attenuate vibration loads above a certain frequency; vibration absorption is to install a vibration absorber composed of a spring-damping-mass element on the device to absorb the capacity by anti-resonance. Both ways achieve vibration reduction through external components, but cannot change the anti-vibration performance of the system in real time. However, the vibration in the field of aerospace often has a very wide frequency, and the above two ways cannot avoid all resonance frequencies. The stiffness of the system is linearly related to its natural frequency. According to the external vibration source, the stiffness of the system can be adjusted in real time to avoid the resonance frequency range and achieve wide-frequency vibration reduction.

[0004] At present, enhancing thermal insulation or strengthening heat dissipation are two ways to protect the system from heat. The porous structure has been proved to have good steady-state thermal insulation performance and convective heat dissipation performance, and also has high-efficiency lightweight design capability. However, due to immature theoretical basis and complex actual engineering conditions, only a single performance of the porous structure is often used in engineering applications. Therefore, integrated design of convective heat dissipation and steady-state thermal insulation performance will be beneficial to the improvement of the utilization efficiency of the structure. SUMMARY

[0005] The purpose of the present application is to overcome the deficiencies of the prior art and devices, and to provide a temperature and vibration coupling controller and method based on a shape memory alloy porous structure, which can realize control of heat dissipation flow resistance and variable-stiffness wide-frequency vibration reduction.

[0006] To achieve the above technical purposes, the present application will adopt the following technical solutions:

[0007] The application discloses a temperature and vibration coupling controller based on an additive manufacturing shape memory alloy porous structure, which comprises a coupling controller body, wherein the coupling controller body comprises a shell, a movable loading table, a shape memory alloy porous structure, a cooling device and a heating device.

[0008] The shell is respectively provided with an air inlet and an air outlet, and the air inlet and the air outlet are communicated through a ventilation flow channel.

[0009] The shape memory alloy porous structure is arranged in the ventilation flow channel, and the extension direction of the shape memory alloy porous structure is perpendicular to the axial direction of the ventilation flow channel; one side of the shape memory alloy porous structure is communicated with the air inlet through an air inlet flow channel, and the other side is communicated with the air outlet through an air outlet flow channel.

[0010] The shape memory alloy porous structure is provided with the cooling device and the heating device, the cooling device and the heating device are loaded through the shell, and the cooling device can transmit a cold source to the shape memory alloy porous structure, and the heating device can transmit a heat source to the shape memory alloy porous structure.

[0011] The movable loading table is assembled on the shell and faces the position of the shape memory alloy porous structure, and the movable loading table can be connected with a protected device to form an integrated whole.

[0012] Preferably, the coupling controller further comprises a detection device and a control device.

[0013] The detection device comprises a main temperature sensor and a vibration sensor.

[0014] The main temperature sensor is embedded in the movable loading table, is used for detecting temperature information of the protected device, and can transmit the detected temperature information to the control device.

[0015] The vibration sensor is arranged in the shell at the position of the shape memory alloy porous structure, is used for sensing the natural frequency of the protected device, and can transmit the detected natural frequency of the protected device to the control device.

[0016] The control device comprises a temperature control module and a rigidity control module.

[0017] The temperature control module judges whether the temperature of the protected device is in a rated working temperature range according to the temperature information fed back by the main temperature sensor; when the judgment result shows that the temperature of the protected device is in the preset rated working temperature range, the rigidity control module is triggered; when the judgment result shows that the temperature of the protected device is out of the rated working temperature range, the working conditions of the heating device and the cooling device are controlled to regulate the flow resistance of the shape memory alloy porous structure until the temperature information fed back by the main temperature sensor is in the rated working temperature range.

[0018] The rigidity control module judges whether the protected device is in a resonance state with the vibration load suffered by the protected device according to the natural frequency of the protected device transmitted by the vibration sensor, and when the judgment result indicates that the protected device is in a resonance state with the vibration load suffered, the control device calculates a temperature rise space calculation value according to the temperature information fed back by the main temperature sensor , and controls the working conditions of the heating device and the cooling device according to the temperature rise space calculation value , so as to control the rigidity of the shape memory alloy porous structure and further control the natural frequency of the protected device, until the natural frequency of the protected device is out of resonance with the vibration load suffered.

[0019] Preferably, in the temperature control module, the preset rated working temperature interval is (T , ), wherein: is the lower limit temperature of the rated working temperature interval, and is the upper limit temperature of the rated working temperature interval;

[0020] The temperature control module judges whether the temperature of the protected device is in the rated working temperature interval by comparing the temperature information fed back by the main temperature sensor with the size of the rated working temperature interval:

[0021] When the comparison result is , the first execution instruction is output to the heating device and the cooling device to control the heating device and the cooling device to be in a stop state;

[0022] When the comparison result is , the second execution instruction is output to the heating device and the cooling device to start the cooling device and stop the heating device, so that the cooling device directly transmits a cold source to the movable object table and the shape memory alloy porous structure, and at the same time, the cold source provided by the cooling device can induce the shape memory alloy porous structure to increase the deformation amount and relax the shape, so as to reduce the flow resistance of the shape memory alloy porous structure and strengthen the convection heat dissipation of the ventilation flow channel, until the temperature information fed back by the main temperature sensor is in the preset rated working temperature interval (T , , );

[0023] When the comparison result is At the same time, a third execution command is output to the heating and cooling devices to start the heating device and stop the cooling device. This causes the heating device to directly transfer heat to the movable stage and the shape memory alloy porous structure. Simultaneously, the heat provided by the heating device causes the deformation of the shape memory alloy porous structure to decrease, causing it to shrink. This increases the flow resistance of the shape memory alloy porous structure and weakens the convective heat dissipation of the ventilation channel until the temperature information fed back by the main temperature sensor is received. Within the preset rated operating temperature range ( , ).

[0024] Preferably, in the stiffness control module, the calculated temperature rise space value Calculated using the following formula:

[0025] ;

[0026] In the above formula: This is the lower limit temperature of the rated operating temperature range, while This is the upper limit temperature of the rated operating temperature range; The temperature information fed back by the main temperature sensor;

[0027] The stiffness control module compares the calculated values ​​of the temperature rise space. With the preset temperature rise threshold The size of the interval is used to control the operating conditions of the heating and cooling devices:

[0028] When the comparison results show At that time, the fourth execution command is output to the heating device and the cooling device to start the heating device and stop the cooling device, so that the heating device provides heat to induce the porous structure of the shape memory alloy to shrink in shape, reduce the restoring force, and thus reduce the natural frequency of the protected equipment until the natural frequency of the protected equipment is no longer in resonance with the vibration load it has been subjected to.

[0029] When the comparison results show At that time, the fifth execution command is sent to the heating device and the cooling device to start the cooling device and stop the heating device, so that the cooling device provides cold energy to induce the porous structure of the shape memory alloy to expand its shape, increase the restoring force, and thus increase the natural frequency of the protected equipment until the natural frequency of the protected equipment is no longer in resonance with the vibration load it has been subjected to.

[0030] Preferably, the shape memory alloy porous structure includes a porous structure body, which is made of a two-way shape memory effect alloy.

[0031] The porous structure body is made of a plurality of laminated plate-shaped porous structures, and each porous cell structure of an upper plate-shaped porous structure is correspondingly laminated on each porous cell structure of a lower plate-shaped porous structure between two adjacent plate-shaped porous structures.

[0032] Each plate-shaped porous structure comprises a plurality of circumferentially distributed porous cell structures, each of which comprises a substrate and two strip-shaped connectors, the two strip-shaped connectors being a first and a second strip-shaped connector, the substrate has a through hole in a middle region thereof, the two ends of the first and second strip-shaped connectors are respectively connected to two different sites of the through hole, the first strip-shaped connector is outwardly protruding relative to the plane of the substrate, and the second strip-shaped connector is inwardly recessed relative to the plane of the substrate, and the first and second strip-shaped connectors are cross-shaped when projected onto the plane of the substrate.

[0033] Preferably, the structural parameters of each porous cell structure satisfy:

[0034] w = l = 10 · t;

[0035] d = 4 · t;

[0036] D = 8 · t;

[0037] h = 2.5 · t;

[0038] In the formula, w represents the width of the porous cell structure, l represents the length of the porous cell structure, t represents the thickness of the porous cell structure, d represents the width of the narrowest part of the substrate in the porous cell structure, D represents the width of the narrowest part of the strip-shaped connector in the porous cell structure, and h represents the height of the narrowest part of the strip-shaped connector relative to the substrate in the porous cell structure.

[0039] Preferably, the cooling device comprises an air inlet cooling device and an air outlet cooling device.

[0040] The air inlet cooling device and the air outlet cooling device are arranged in the ventilation flow channel and are respectively arranged on the two sides of the shape memory alloy porous structure, and the air inlet cooling device is arranged close to the air inlet of the ventilation flow channel, and the air outlet cooling device is arranged close to the air outlet of the ventilation flow channel.

[0041] Preferably, the heating device comprises a first electrode plate and a second electrode plate.

[0042] The upper wall plate of the shell is provided with a first through slot at a position corresponding to the upper end of the shape memory alloy porous structure, and the lower wall plate of the shell is provided with a second slot with an open upper end at a position corresponding to the lower end of the shape memory alloy porous structure.

[0043] The first electrode plate is installed below the first slot and connected with an external power supply through the first electrode interface, and the movable object table is installed above the first slot;

[0044] The second electrode plate is arranged at the notch position of the second slot and connected with an external power supply through the second electrode interface, the vibration sensor is arranged below the second slot and connected with a signal transmission line through the vibration sensor interface, and the second electrode plate and the vibration sensor are separated by the heat insulation plate.

[0045] Preferably, the part of the ventilation flow channel between the air inlet and the shape memory alloy porous structure is the air inlet flow channel, and the part of the ventilation flow channel between the air outlet and the shape memory alloy porous structure is the air outlet flow channel;

[0046] The detection device further comprises an air inlet pressure sensor, an air inlet temperature sensor, an air outlet pressure sensor, and an air outlet temperature sensor;

[0047] The air inlet pressure sensor and the air inlet temperature sensor are arranged in the air inlet flow channel, and the air outlet pressure sensor and the air outlet temperature sensor are arranged in the air outlet flow channel;

[0048] The temperature regulation module further comprises a flow resistance calculation module and a porous structure deformation regulation module;

[0049] The air inlet pressure sensor is arranged in the air inlet flow channel close to the air inlet, is used for detecting air inlet pressure information, and can transmit the detected air inlet pressure information to the flow resistance calculation module in real time;

[0050] The air outlet pressure sensor is arranged in the air outlet flow channel close to the air outlet, is used for detecting air outlet pressure information, and can transmit the detected air outlet pressure information to the flow resistance calculation module in real time;

[0051] The air inlet temperature sensor is arranged in the air inlet flow channel close to the air inlet, is used for detecting air inlet temperature information, and can transmit the detected air inlet temperature information to the porous structure deformation regulation module in real time;

[0052] The air outlet temperature sensor is arranged in the air outlet flow channel close to the air outlet, is used for detecting air outlet temperature information, and can transmit the detected air outlet temperature information to the porous structure deformation regulation module in real time;

[0053] The porous structure deformation regulation module calculates a deformation scale factor of the shape memory alloy porous structure at the current time according to the received air inlet temperature information and air outlet temperature information, judges whether the calculated deformation scale factor meets the requirement, triggers the flow resistance calculation module when the calculated deformation scale factor meets the requirement, and stops the heating device or the cooling device; the deformation scale factor is calculated by the following formula:

[0054] ;

[0055] In the formula: represents the outlet temperature information detected by the outlet temperature sensor at the current moment; represents the inlet temperature information detected by the inlet temperature sensor at the current moment; represents the preset temperature difference threshold value;

[0056] The flow resistance calculation module calculates the flow resistance of the shape memory alloy porous structure at the current moment according to the received inlet pressure information and outlet pressure information, and judges whether the calculated flow resistance of the shape memory alloy porous structure is within the preset flow resistance threshold range; when the judgment result shows that the calculated flow resistance of the shape memory alloy porous structure exceeds the flow resistance threshold range, stop processing;

[0057] The flow resistance of the shape memory alloy porous structure is calculated by the following formula:

[0058] ;

[0059] In the formula: represents the flow resistance of the shape memory alloy porous structure at the current moment; represents the outlet pressure information detected by the outlet pressure sensor at the current moment; represents the inlet pressure information detected by the inlet pressure sensor at the current moment; represents the flow rate in the ventilation flow channel.

[0060] Another technical purpose of the present application is to provide a control method of the temperature and vibration coupling controller based on the shape memory alloy porous structure manufactured by additive manufacturing, which comprises the following steps:

[0061] Step one, install the temperature and vibration coupling controller on the protected equipment:

[0062] The temperature and vibration coupling controller is installed on the protected equipment through a movable object table;

[0063] Step two, real-time detection of temperature information of the protected equipment and inherent frequency of the protected equipment:

[0064] The temperature information of the protected equipment is detected in real time through the main temperature sensor;

[0065] The inherent frequency of the protected equipment is detected in real time through the vibration sensor;

[0066] Step three, regulating the working temperature of the protected equipment:

[0067] The temperature information of the protected device detected by the main temperature sensor in real time is compared with the preset rated temperature interval to determine whether the temperature information of the protected device exceeds the preset rated temperature interval:

[0068] When the determination result indicates that the temperature information of the protected device is in the preset rated temperature interval, step four is entered;

[0069] When the determination result indicates that the temperature information of the protected device is greater than the upper limit value of the preset rated temperature interval, the cooling device is started and the heating device is stopped, so that the cooling device directly transmits a cold source to the movable object table and the shape memory alloy porous structure. At the same time, the cold source provided by the cooling device can induce an increase in the deformation amount of the shape memory alloy porous structure, so that the shape of the shape memory alloy porous structure is relaxed, the flow resistance of the shape memory alloy porous structure is reduced, the convection heat dissipation of the ventilation flow channel is strengthened, and the temperature information fed back by the main temperature sensor is in the preset rated working temperature interval;

[0070] When the determination result indicates that the temperature information of the protected device is less than the lower limit value of the preset rated temperature interval, the heating device is started and the cooling device is stopped, so that the heating device directly transmits a heat source to the movable object table and the shape memory alloy porous structure. At the same time, the heat source provided by the heating device causes the deformation amount of the shape memory alloy porous structure to decrease, so that the shape of the shape memory alloy porous structure is contracted, thereby increasing the flow resistance of the shape memory alloy porous structure and weakening the convection heat dissipation of the ventilation flow channel, and the temperature information fed back by the main temperature sensor is in the preset rated working temperature interval;

[0071] Step four, determine whether the natural frequency of the protected device is in a resonance state with the vibration load suffered:

[0072] The natural frequency of the protected device detected by the vibration sensor in real time is compared with the characteristic frequency of the vibration load suffered. When the determination result indicates that the protected device is in a resonance state with the vibration load suffered, the temperature rise space calculation value is calculated by the following formula :

[0073]

[0074] In the above formula: is the lower limit temperature of the rated working temperature interval, and is the upper limit temperature of the rated working temperature interval; is the temperature information fed back by the main temperature sensor;

[0075] Step five, regulate the natural frequency of the protected device:

[0076] By comparing the temperature rise space calculation value with the preset temperature rise space threshold value the size between the two to control the working condition of the heating device and the cooling device:

[0077] When the comparison result shows that the heating device is started and the cooling device is stopped, so as to induce the shape memory alloy porous structure to contract in shape, reduce the restoring force, and then reduce the natural frequency of the protected equipment, until the natural frequency of the protected equipment is out of resonance with the vibration load suffered;

[0078] When the comparison result shows that the cooling device is started and the heating device is stopped, so as to induce the shape memory alloy porous structure to dilate in shape, increase the restoring force, and then increase the natural frequency of the protected equipment, until the natural frequency of the protected equipment is out of resonance with the vibration load suffered.

[0079] Based on the above technical purposes, compared with the prior art, the present application has the following advantages:

[0080] The flow resistance vibration reduction device - the porous structure of the present application has good deformation capacity, can adjust the cross-sectional area of the airflow direction in a large range, realizes flow resistance regulation and control; the porous structure is made of shape memory alloy, and when the phase transition occurs between the martensite and austenite of the material, stable superelasticity, double-way shape memory performance and damping performance can be realized; the shape memory alloy porous structure is formed by laser additive manufacturing technology, and the geometric shape and porosity of the porous structure can be designed according to the actual working condition of engineering application; based on the external temperature and vibration load, the computer controller can receive the information transmitted by the temperature, air pressure and vibration sensors to adjust the current input of the heating device and the coolant output of the cooling device, realize real-time adjustment of the recovery displacement of the porous structure, and then change the stiffness of the porous structure in real time, so as to achieve the purpose of wide frequency vibration reduction. BRIEF DESCRIPTION OF DRAWINGS

[0081] Only a part of the drawings and schematic embodiments and their descriptions related to the present application are provided here for further understanding of the present application, but it should be noted that this does not constitute a limitation of the present application.

[0082] Figure 1 The overall structure diagram of the temperature and vibration coupling controller based on the shape memory alloy porous structure according to Embodiment 1 of the present application is shown in the figure;

[0083] Figure 2 The cross-sectional view of Figure 1 ;

[0084] Figure 3 The side view of Figure 1 ;

[0085] Figure 4 Fig. 1 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application; Figure 1 Fig. 2 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application; Fig. 3 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application;

[0086] Fig. 4 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application; Figure 5 Fig. 5 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application; Fig. 6 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application;

[0087] Fig. 7 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application; Figure 6 Fig. 8 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application; Fig. 9 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application;

[0088] Fig. 10 is a schematic diagram of a shape memory alloy porous structure according to an embodiment of the present application; DETAILED DESCRIPTION

[0089] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. Unless otherwise specified, the relative arrangement, expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. The technology, methods and devices known to those of ordinary skill in the related art can not be discussed in detail, but should be considered as part of the specification when appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values.

[0090] For purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "top", "bottom", "horizontal", "vertical", "upper", "lower", and the like, can be used to describe an orientation of one element or feature to another element or feature as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. For example, if a device is inverted, then the description of a "below" or "under" another part or feature can be interpreted as above or over the other part or feature.

[0091] In view of the challenges of over-temperature and vibration control in engineering applications, the present application proposes a temperature and vibration coupling controller and method based on a shape memory alloy porous structure 11. The following is a partial embodiment of the present application:

[0092] Embodiment 1

[0093] Attached Figures 1-4 The temperature and vibration coupling controller based on a shape memory alloy porous structure 11 described in the present application includes a coupling controller body, which can be integrated with the protected equipment, for coupling and regulating the vibration load and temperature of the protected equipment, achieving broadband vibration reduction and heat dissipation of the protected equipment. The coupling controller body includes a shell 4, a movable stage 1, a shape memory alloy porous structure 11, a detection device, a cooling device, a heating device, and a control device (i.e., control system 23), wherein:

[0094] The shell 4 is of assembled structure, and in the drawings, the shell 4 is selected to be rectangular in shape, but other shapes can also be selected, which are not particularly limited here. The shell 4 is provided with an air inlet, an air outlet, and an embedded inlet for assembling other components, and the air inlet and the air outlet are communicated through a ventilation flow channel. In the drawings, the number of air inlets and air outlets is 1, and the number of embedded inlets is multiple. It should be pointed out that in other possible embodiments, the number of air inlets and air outlets of the shell 4 can be customized according to the use environment and design requirements, for example, one air inlet and multiple air outlets. The embedded inlets provided on the shell 4 are provided according to the assembly of the detection device, the cooling device, and the heating device.

[0095] The movable load platform 1 is arranged in the middle of the shell 4, the number is 1, the shape is a cuboid structure, and small displacement can be generated along a single normal under the action of external load. The movable load platform 1 is embedded with a first temperature sensor for real-time monitoring of the temperature of the protected equipment and transmitting the temperature signal value to the control device. The movable load platform 1 can be directly connected with the protected equipment through riveting, welding, bonding and the like, and plays a role of transmitting load and temperature. It should be pointed out that in other possible embodiments, the shape, number of the movable load platform 1 can be changed, the embedded sensor type and number can be changed, and the connection mode with the protected device can be changed, as long as the intended purpose is achieved, which is within the protection scope of the present application.

[0096] The shape memory alloy porous structure 11 is arranged in the ventilation flow channel; the air inlet is communicated with the shape memory alloy porous structure 11 through the ventilation flow channel, and the shape memory alloy porous structure 11 is communicated with the air outlet through the air outlet flow channel.

[0097] The shape memory alloy porous structure 11 comprises a porous structure body, and the porous structure body is made of a double-way shape memory effect alloy, and realizes the double-way shape memory effect through an electric heating device and a cooling device. Specifically, the porous structure body is made of a plurality of laminated plate-shaped porous structures, and each porous cell structure of the upper plate-shaped porous structure is correspondingly stacked on each porous cell structure of the lower plate-shaped porous structure between the adjacent two plate-shaped porous structures; each plate-shaped porous structure comprises a plurality of circumferentially distributed porous cell structures; each porous cell structure comprises a base plate and two strip-shaped connecting bodies; the two strip-shaped connecting bodies correspond to first and second strip-shaped connecting bodies; the middle region of the base plate is provided with a through hole; the two ends of the first and second strip-shaped connecting bodies are respectively connected with two different points on the through hole, and the first strip-shaped connecting body is outwardly protruding relative to the plane of the base plate, while the second strip-shaped connecting body is inwardly recessed relative to the plane of the base plate, and the first and second strip-shaped connecting bodies are cross-shaped when projected onto the plane of the base plate.

[0098] The structural parameters of each porous cell structure satisfy:

[0099] w = l = 10 · t;

[0100] d = 4 · t;

[0101] D = 8 · t;

[0102] h = 2.5 · t;

[0103] In the formula, w represents the width of the porous unit structure; l represents the length of the porous unit structure; t represents the thickness of the porous unit structure; d represents the width of the narrowest part of the substrate in the porous unit structure; D represents the width of the narrowest part of the strip-shaped connector in the porous unit structure; and h represents the height of the narrowest part of the strip-shaped connector relative to the substrate in the porous unit structure.

[0104] In the present application, the shape memory alloy porous structure 11 is designed by the following steps:

[0105] Step a, determining the design domain of the porous unit structure in the porous structure body, inputting the three-axis sizes of the design domain length l, width w and height h;

[0106] Step b, determining the turning points of the center surface profile line of the porous unit structure, so that the narrowest part between the center surface profile line and the boundary line of the design domain is d. Then, the adjacent two points are sequentially connected by a curve, the end of the curve is tangent to the boundary line of the design domain, and the curvatures of the adjacent two curves are continuous, so as to constitute the center surface profile line of the porous unit structure, which can be referred to (b) in FIG. 2. Figure 4

[0107] Step c, dividing the surface grid inside the constraint area of the center surface profile line, and generating a continuous surface by using a design software (such as Rhino), which can be referred to (c) in FIG. 3. Figure 4

[0108] Step d, symmetrically offsetting the continuous surface by the same distance t / 2, and performing solid filling, so as to form the porous unit structure with the wall thickness t.

[0109] Step e, determining the three-axis sizes of the porous structure body: expanding the porous unit structure in the Cartesian three-axis coordinate system, and constituting the final porous structure by a Boolean operation, which can be referred to (a) in FIG. 4. Figure 4

[0110] The cooling device comprises an air inlet cooling device 5 and an air outlet cooling device 22; the air inlet cooling device 5 is arranged in the air inlet flow channel close to the air inlet, and the air outlet cooling device 22 is arranged in the air outlet flow channel close to the air outlet; in other words, the air inlet cooling device 5 and the air outlet cooling device 22 of the present application are arranged in the ventilation flow channel and are separately arranged on both sides of the shape memory alloy porous structure 11. The air inlet cooling device 5 enters the cold source through the air inlet cooling device interface 10. The air outlet cooling device 22 is connected to the cold source through the air outlet cooling device interface 17. The cold source adopts gaseous liquid nitrogen, so that the porous structure is rapidly cooled by gaseous liquid nitrogen. When it is pointed out, in other possible embodiments, cooling methods such as heat pump technology can be provided, as long as the double-way shape memory requirement of the porous structure can be met.

[0111] ​​​The heating device is loaded in the shell 4, and the heating device can provide a heat source for the shape memory alloy porous structure 11. The heating device includes first and second electrode plates 15, and the wall plates of the shell 4 are arranged as groove structures on both sides of the extension direction of the shape memory alloy porous structure 11, which are first and second grooves. Figure 2 In the embodiment, the extension direction of the shape memory alloy porous structure 11 is the up-down direction, so the first groove is arranged on the upper wall plate of the shell 4, and the second groove is arranged on the lower wall plate of the shell 4. The first groove is a through groove, and the first electrode plate 3 is arranged below and connected to an external power source through the first electrode interface 2. The movable object table 1 is arranged above. The second groove is an open groove arranged with an open end facing the end of the shape memory alloy porous structure 11. The second electrode plate 15 is arranged at the groove opening position of the second groove and connected to an external power source through the second electrode interface 14. The vibration sensor 12 is arranged below and a signal transmission line is led out through the vibration sensor interface 13. The second electrode plate 15 and the vibration sensor 12 are separated by the heat insulation plate 16. It should be pointed out that in other possible embodiments, the heating device can be arranged in other heating modes, such as electromagnetic induction heating, as long as the double-path shape memory requirement of the porous structure can be met.

[0112] The detection device includes a main temperature sensor and a vibration sensor 12.

[0113] The vibration sensor 12 is arranged in the shell 4 at the position of the shape memory alloy porous structure 11, used for sensing the natural frequency of the protected device, and can transmit the sensed natural frequency of the protected device to the control device in real time. The signal transmission line of the vibration sensor 12 is led out through the vibration sensor interface 13 and connected to the control device.

[0114] The control device includes a temperature control module and a stiffness control module.

[0115] The temperature control module determines whether the temperature of the protected device is in the rated working temperature range according to the temperature information fed back by the main temperature sensor. When the determination result shows that the temperature of the protected device is in the preset rated working temperature range, the stiffness control module is triggered. When the determination result shows that the temperature of the protected device is out of the rated working temperature range, the working conditions of the heating device and the cooling device are controlled to regulate the flow resistance of the shape memory alloy porous structure 11 until the temperature information fed back by the main temperature sensor is in the rated working temperature range.

[0116] The stiffness control module determines whether the protected equipment is in resonance with the vibration load it is subjected to based on the natural frequency transmitted by the vibration sensor 12. When the determination result indicates that the protected equipment is in resonance with the vibration load, the control device calculates the temperature rise space value based on the temperature information fed back by the main temperature sensor. And calculate the value based on the temperature rise space. The operating conditions of the heating and cooling devices are controlled to regulate the stiffness of the porous shape memory alloy structure 11, thereby regulating the natural frequency of the protected equipment until the natural frequency of the protected equipment is no longer in resonance with the vibration load it has been subjected to.

[0117] Preferably, in the temperature control module, the preset rated operating temperature range is ( , ),in: This is the lower limit temperature of the rated operating temperature range, while This is the upper limit temperature of the rated operating temperature range;

[0118] The temperature control module compares the temperature information fed back by the main temperature sensor. The temperature of the protected equipment can be determined by comparing it with the rated operating temperature range.

[0119] When the comparison result is At that time, the first execution command is output to the heating device and the cooling device to control both the heating device and the cooling device to be in a stopped state;

[0120] When the comparison result is At the same time, a second execution command is output to the heating and cooling devices to start the cooling device and stop the heating device. This causes the cooling device to directly transfer the cold source to the movable stage 1 and the shape memory alloy porous structure 11. Simultaneously, the cold source provided by the cooling device can induce an increase in the deformation of the shape memory alloy porous structure 11, causing it to expand its shape. This reduces the flow resistance of the shape memory alloy porous structure 11, enhances the convective heat dissipation of the ventilation channel, and ultimately reaches the temperature information fed back by the main temperature sensor. Within the preset rated operating temperature range ( , );

[0121] When the comparison result is At the same time, a third execution command is output to the heating device and cooling device to start the heating device and stop the cooling device, causing the heating device to directly transfer heat to the movable stage 1 and the shape memory alloy porous structure 11. Simultaneously, the heat source provided by the heating device causes the deformation of the shape memory alloy porous structure 11 to decrease, causing it to shrink, thereby increasing the flow resistance of the shape memory alloy porous structure 11 and weakening the convective heat dissipation of the ventilation channel until the temperature information fed back by the main temperature sensor is received. Within the preset rated operating temperature range ( , ).

[0122] Preferably, in the stiffness control module, the calculated temperature rise space value Calculated using the following formula:

[0123] ;

[0124] In the above formula: This is the lower limit temperature of the rated operating temperature range, while This is the upper limit temperature of the rated operating temperature range; The temperature information fed back by the main temperature sensor;

[0125] The stiffness control module compares the calculated values ​​of the temperature rise space. With the preset temperature rise threshold The size of the interval is used to control the operating conditions of the heating and cooling devices:

[0126] When the comparison results show At that time, the fourth execution command is output to the heating device and the cooling device to start the heating device and stop the cooling device, so that the heating device provides heat to induce the shape memory alloy porous structure 11 to shrink in shape, reduce the restoring force, and thus reduce the natural frequency of the protected equipment until the natural frequency of the protected equipment is no longer in resonance with the vibration load it has been subjected to.

[0127] When the comparison results show At that time, the fifth execution command is output to the heating device and the cooling device to start the cooling device and stop the heating device, so that the cooling device provides cold energy to induce the shape memory alloy porous structure 11 to expand its shape, increase the restoring force, and thus increase the natural frequency of the protected equipment until the natural frequency of the protected equipment is no longer in resonance with the vibration load it has been subjected to.

[0128] Considering that the shape memory alloy porous structure 11 will not deform when the received heat or refrigeration reaches a certain degree, we configure a porous structure deformation control module for the temperature control module, so that the heating device or cooling device can be stopped when the deformation of the shape memory alloy porous structure 11 reaches the preset requirement, thereby saving energy and protecting the environment. During the temperature control and adjustment of the protected equipment, the shape memory alloy porous structure 11 will change its shape. When the deformation does not meet the requirements, the heating device or cooling device is turned on to continuously input heat or refrigeration to the shape memory alloy porous structure 11 until the deformation of the shape memory alloy porous structure 11 reaches the preset requirement.

[0129] Generally, the corresponding flow resistance of the shape memory alloy porous structure 11 is determined when it is in a specific shape. Considering that the shape memory alloy porous structure 11 may be damaged during use, the flow resistance of the deformed shape memory alloy porous structure 11 may not meet the corresponding requirements. Therefore, the applicant configures a flow resistance calculation module for the temperature control module to monitor whether the flow resistance control performance of the shape memory alloy porous structure 11 meets the requirements.

[0130] Therefore, the detection device further comprises an air inlet pressure sensor 6, an air inlet temperature sensor 7, an air outlet pressure sensor 18, and an air outlet temperature sensor 21. The air inlet pressure sensor 6 and the air inlet temperature sensor 7 are arranged in the air inlet flow channel, and the air outlet pressure sensor 18 and the air outlet temperature sensor 21 are arranged in the air outlet flow channel. The part of the ventilation flow channel between the air inlet and the shape memory alloy porous structure 11 is the air inlet flow channel, and the part of the ventilation flow channel between the air outlet and the shape memory alloy porous structure 11 is the air outlet flow channel.

[0131] The air inlet pressure sensor 6 is arranged in the air inlet flow channel close to the air inlet, is used for detecting air inlet pressure information, and can transmit the detected air inlet pressure information to the control device in real time. The signal transmission line of the air inlet pressure sensor 6 is led out through the air inlet pressure sensor interface 9 and connected with the control device.

[0132] The air inlet temperature sensor 7 is arranged in the air inlet flow channel close to the air inlet, is used for detecting air inlet temperature information, and can transmit the detected air inlet temperature information to the control device in real time. The signal transmission line of the air inlet temperature sensor 7 is led out through the air inlet temperature sensor interface 8 and connected with the control device.

[0133] The air outlet pressure sensor 18 is arranged in the air outlet flow channel close to the air outlet, for detecting the air outlet pressure information and transmitting the detected air outlet pressure information to the control device in real time; the signal transmission line of the air outlet pressure sensor 18 is led out through the air outlet pressure sensor interface 19 and connected with the control device.

[0134] The air outlet temperature sensor 21 is arranged in the air outlet flow channel close to the air outlet, for detecting the air outlet temperature information and transmitting the detected air outlet temperature information to the control device in real time; the signal transmission line of the air outlet temperature sensor 21 is led out through the air outlet temperature sensor interface 20 and connected with the control device.

[0135] Specifically, the porous structure deformation regulation module calculates the deformation scale factor of the shape memory alloy porous structure 11 at the current time according to the received air inlet temperature information and air outlet temperature information, and judges whether the calculated deformation scale factor meets the requirement; when the calculated deformation scale factor meets the requirement, the flow resistance calculation module is triggered and the heating device or the cooling device is stopped; the deformation scale factor The deformation scale factor is calculated by the following formula:

[0136] ;

[0137] In the formula: Tout represents the air outlet temperature information detected by the air outlet temperature sensor 21 at the current time; Tin represents the air inlet temperature information detected by the air inlet temperature sensor 7 at the current time; ΔT represents the preset temperature difference threshold.

[0138] In other words, when , that is, the air outlet temperature of the ventilation channel is higher than the air inlet temperature, at this time the protected equipment is in an overheating state, and the shape memory alloy porous structure 11 needs to be relaxed to reduce the flow resistance of the shape memory alloy porous structure 11, until the deformation scale factor of the shape memory alloy porous structure 11 reaches the preset deformation scale factor threshold . When , that is, the air outlet temperature of the ventilation channel is lower than the air inlet temperature, at this time the protected equipment is in an overcooling state, and the shape memory alloy porous structure 11 needs to be contracted to increase the flow resistance of the shape memory alloy porous structure 11, until the deformation scale factor of the shape memory alloy porous structure 11 reaches the preset deformation scale factor threshold .

[0139] Generally, the deformation scale factor threshold Corresponding is the shape memory alloy porous structure 11 deformed (dilated or contracted) to the limit state.

[0140] The flow resistance calculation module calculates the flow resistance of the shape memory alloy porous structure 11 at the current time according to the received inlet pressure information and outlet pressure information, and judges whether the calculated flow resistance of the shape memory alloy porous structure 11 is within the preset flow resistance threshold range. When the judgment result shows that the calculated flow resistance of the shape memory alloy porous structure 11 exceeds the flow resistance threshold range, stop processing;

[0141] The flow resistance of the shape memory alloy porous structure 11 is calculated by the following formula:

[0142] ;

[0143] In the formula: The flow resistance of the shape memory alloy porous structure 11 at the current time is represented. The outlet pressure information detected by the outlet pressure sensor 18 at the current time is represented. The inlet pressure information detected by the inlet pressure sensor 6 at the current time is represented. The flow in the ventilation flow channel is represented.

[0144] The shape memory alloy porous structure 11 is a double-period minimal surface structure ( Figure 4 ), preferably, the shape memory alloy is a nickel-titanium (NiTi) material, and the forming technology is a laser additive manufacturing technology, specifically, a laser powder bed fusion technology. It should be pointed out that in other possible embodiments, as long as the double-path shape memory effect and the variable flow resistance purpose can be achieved, the porous configuration, the shape memory material and the forming technology can be changed.

[0145] Embodiment 2

[0146] Attached Figure 5 With attached Figure 6 The embodiment 2 of the present application is shown, which is a method for temperature and vibration coupling controller based on additive manufacturing shape memory alloy porous structure.

[0147] The external thermal load transmission and / or self-heat accumulation in the protected equipment causes temperature rise, which is monitored by the embedded temperature sensor (i.e. the above-mentioned main temperature sensor) of the movable load table 1 and the signal is transmitted to the control system 23; the control system 23 compares the real-time temperature with the set rated working temperature interval, and judges whether the temperature is within the rated working temperature interval. When the real-time temperature is not within the rated working temperature interval, it can be divided into two cases:

[0148] Scenario 1: After the temperature rises, the temperature of the protected equipment exceeds the rated operating temperature, requiring heat dissipation. At this time, the control system 23 activates the cooling device. On one hand, the coolant can directly accelerate the heat dissipation rate transferred from the equipment to the movable stage 1, the electrode plate, and the shape memory alloy porous structure 11 through heat exchange; on the other hand, the coolant induces an increase in the deformation of the shape memory alloy porous structure 11, causing it to expand its shape (see attached diagram). Figure 6 (Solid line) Under constant inlet temperature and pressure, the resistance of fluid passing through the porous shape memory alloy structure 11 is reduced, enhancing convective heat dissipation. A temperature sensor embedded in the stage monitors the system temperature in real time during this process until the temperature drops to the rated operating temperature range.

[0149] Scenario 2: The temperature rise is negative, indicating that the temperature of the protected equipment is below the rated operating temperature, requiring heat storage treatment. In this case, the control system 23 activates the electric heating device. On one hand, since the shape memory alloy porous structure 11 acts as a resistor in the electric heating device, the heat it generates can be directly transferred to the system to compensate for heat loss and achieve a temperature rise. On the other hand, the shape memory alloy porous structure 11 deforms less due to the temperature increase, causing its shape to shrink (see attached diagram, dashed line). Under constant inlet temperature and pressure, this increases the resistance of the fluid passing through the shape memory alloy porous structure 11, weakening convective heat dissipation and facilitating heat accumulation, thus achieving a temperature rise. The temperature sensor monitors the system temperature in real time during this process until the temperature rises to the rated operating temperature range.

[0150] Preferably, the inlet and outlet temperature and pressure sensors detect the inlet and outlet temperature and pressure values ​​in real time and transmit the values ​​to the computer system (control device). The computer control system 23 further calculates the pressure difference and temperature difference based on the inlet and outlet temperatures and pressures to evaluate the real-time flow resistance of the coupling controller. Combined with the temperature of the protected equipment, the flow resistance adjustment range is determined.

[0151] It is worth noting that during the cooling or heating process, technicians can set the output of coolant or the input of current as needed, thereby controlling the cooling or heating rate within the limits of the coupling controller. After temperature regulation, the real-time temperature is within the rated operating range of the protected equipment, at which point vibration performance regulation is performed.

[0152] When the protected equipment is subjected to a vibration load of a specific frequency, the vibration signal (alternating displacement, force) will be transmitted to the vibration sensor 12 through the movable stage 1, electrode plate, shape memory alloy porous structure 11 and heat insulation layer. The vibration sensor 12 further transmits the signal to the control system 23. The control system 23 compares the vibration frequency of the received vibration load with the system's natural frequency to determine whether resonance occurs. When the natural frequency of the protected equipment is detected to be close to the vibration frequency, the system's natural frequency is adjusted.

[0153] According to the relationship of the natural frequency f n , the mass m and the stiffness k:

[0154]

[0155] It can be seen that when the system mass is constant, the natural frequency can be regulated by adjusting the system stiffness. Since the adjustment of the stiffness is realized by the shape memory alloy porous structure 11, it is necessary to judge the temperature rise space :

[0156]

[0157] wherein, is the upper limit temperature of the rated working temperature range, is the lower limit temperature of the rated working temperature, is the temperature of the system at time t, which is obtained by detecting the main temperature sensor. When δ>0.5, it is considered that the system has a large temperature rise space; when δ<0.5, it is considered that the system has a small temperature rise space. Based on the above relationship, the regulation of the natural frequency of the system can be divided into two cases.

[0158] Case 1: The temperature rise space is small, at this time the stiffness regulation is realized by the shape memory recovery direction of the cooling control, to ensure that the system temperature is still in the rated working range. The control system 23 controls the cooling device to induce the shape memory alloy porous structure 11 to occur shape relaxation, to provide greater restoring force (attached Figure 6 , dotted line), improve the system stiffness, avoid resonance by increasing the natural frequency.

[0159] Case 2: The temperature rise space is large, at this time the stiffness regulation is realized by the shape memory recovery direction of the heating control, to ensure that the system temperature is still in the rated working range. The control system 23 controls the heating device to induce the shape memory alloy porous structure 11 to occur shape contraction, the restoring force decreases (attached Figure 6 , dotted line), the system stiffness decreases, avoid resonance by reducing the natural frequency.

[0160] In this process, the vibration sensor 12 transmits the alternating displacement, force signal to the computer control system 23 in real time, and iteratively compares with the input vibration frequency, until the resonance state is separated.

[0161] Therefore, the temperature and vibration coupling controller based on the additive manufacturing shape memory alloy porous structure 11 of the control method disclosed by the application, comprising the following steps:

[0162] Step 1, install the temperature and vibration coupling controller on the protected equipment:

[0163] The temperature and vibration coupling controller is installed on the protected equipment through the movable stage 1;

[0164] Step two, real-time detection of temperature information of the protected equipment and inherent frequency of the protected equipment:

[0165] Real-time detection of temperature information of the protected equipment through the main temperature sensor;

[0166] Real-time detection of the inherent frequency of the protected equipment through the vibration sensor 12;

[0167] Step three, regulating the working temperature of the protected equipment:

[0168] Comparing the temperature information of the protected equipment detected by the main temperature sensor in real time with the preset rated temperature interval to determine whether the temperature information of the protected equipment exceeds the preset rated temperature interval:

[0169] When the judgment result shows that the temperature information of the protected equipment is in the preset rated temperature interval, step four is entered;

[0170] When the judgment result shows that the temperature information of the protected equipment is greater than the temperature upper limit value of the preset rated temperature interval, the cooling device is started and the heating device is stopped, so that the cooling device directly transmits a cold source to the movable stage 1 and the shape memory alloy porous structure 11, and at the same time, the cold source provided by the cooling device can induce the shape memory alloy porous structure 11 to increase the deformation amount, so that its shape is relaxed, so as to reduce the flow resistance of the shape memory alloy porous structure 11, strengthen the convective heat dissipation of the ventilation flow channel, and until the temperature information fed back by the main temperature sensor is in the preset rated working temperature interval;

[0171] When the judgment result shows that the temperature information of the protected equipment is less than the temperature lower limit value of the preset rated temperature interval, the heating device is started and the cooling device is stopped, so that the heating device directly transmits a heat source to the movable stage 1 and the shape memory alloy porous structure 11, and at the same time, the heat source provided by the heating device causes the shape memory alloy porous structure 11 to reduce the deformation amount, so that its shape is contracted, thereby increasing the flow resistance of the shape memory alloy porous structure 11 and weakening the convective heat dissipation of the ventilation flow channel, until the temperature information fed back by the main temperature sensor is in the preset rated working temperature interval;

[0172] Step four, determining whether the inherent frequency of the protected equipment is in a resonance state with the vibration load suffered:

[0173] Comparing the inherent frequency of the protected equipment detected by the vibration sensor 12 in real time with the characteristic frequency of the vibration load suffered, and when the judgment result shows that the protected equipment is in a resonance state with the vibration load suffered, the temperature rise space calculation value is calculated by the following formula :

[0174]

[0175] In the above formula: is the lower limit temperature of the rated operating temperature range, and is the upper limit temperature of the rated operating temperature range. is the temperature information fed back by the main temperature sensor.

[0176] Step five, regulating the natural frequency of the protected device:

[0177] The working conditions of the heating device and the cooling device are controlled by comparing the size between the calculated value of the temperature rise space and the preset temperature rise space threshold value

[0178] When the comparison result shows , the heating device is started and the cooling device is stopped, the heating device is prompted to provide heat to induce the shape memory alloy porous structure 11 to shrink, the restoring force is reduced, and then the natural frequency of the protected device is reduced, until the natural frequency of the protected device is out of resonance with the vibration load suffered.

[0179] When the comparison result shows , the cooling device is started and the heating device is stopped, the cooling device is prompted to provide cold to induce the shape memory alloy porous structure 11 to dilate, the restoring force is increased, and then the natural frequency of the protected device is increased, until the natural frequency of the protected device is out of resonance with the vibration load suffered.

[0180] It is worth noting that the shape memory effect of the shape memory alloy depends on the phase transition behavior of the material, and the phase transition temperature has a relatively important influence on the present application. It is worth affirming that many studies have proposed methods for controlling a wide range of phase transition temperatures, which provides reliable support for the present application and proves that the content of the present application is feasible.​

Claims

1. A temperature and vibration coupled controller based on additive manufacturing of shape memory alloy porous structure comprising a coupled controller body, characterized in that, The coupling controller body comprises a shell, a movable stage, a shape memory alloy porous structure, a cooling device and a heating device, wherein: The shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are communicated through a ventilation flow channel; The shape memory alloy porous structure is arranged in the ventilation flow channel, and the expansion direction of the shape memory alloy porous structure is perpendicular to the axial direction of the ventilation flow channel, and one side of the shape memory alloy porous structure is communicated with the air inlet through the air inlet flow channel, and the other side is communicated with the air outlet through the air outlet flow channel; The shape memory alloy porous structure is provided with a cooling device and a heating device, and the cooling device and the heating device are loaded through the shell, and the cooling device can transfer cold source to the shape memory alloy porous structure, and the heating device can transfer heat source to the shape memory alloy porous structure; The movable stage is assembled on the shell and opposite to the position of the shape memory alloy porous structure, and the movable stage can be connected with the protected equipment as a whole; When the temperature of the protected equipment is in the preset rated working temperature range, the rigidity control module is triggered to control the rigidity of the shape memory alloy porous structure; when the temperature of the protected equipment exceeds the rated working temperature range, the working conditions of the heating device and the cooling device are controlled to control the flow resistance of the shape memory alloy porous structure.

2. The temperature and vibration coupled controller based on an additive manufacturing shape memory alloy porous structure of claim 1, wherein, Further comprising a detection device and a control device, wherein: The detection device comprises a main temperature sensor and a vibration sensor; The main temperature sensor is embedded in the movable stage, and is used for detecting the temperature information of the protected equipment and transmitting the detected temperature information to the control device; The vibration sensor is arranged in the shell at the position of the shape memory alloy porous structure, and is used for sensing the natural frequency of the protected equipment and transmitting the detected natural frequency of the protected equipment to the control device; The control device comprises a temperature control module and a rigidity control module; The temperature control module judges whether the temperature of the protected equipment is in the rated working temperature range according to the temperature information fed back by the main temperature sensor: when the judgment result shows that the temperature of the protected equipment is in the preset rated working temperature range, the rigidity control module is triggered; when the judgment result shows that the temperature of the protected equipment exceeds the rated working temperature range, the working conditions of the heating device and the cooling device are controlled to control the flow resistance of the shape memory alloy porous structure, until the temperature information fed back by the main temperature sensor is in the rated working temperature range; The rigidity regulation module judges whether the protected device is in a resonance state with the vibration load suffered according to the natural frequency of the protected device transmitted by the vibration sensor, and when the judgment result indicates that the protected device is in the resonance state with the vibration load suffered, the control device calculates a temperature rise space calculation value according to the temperature information fed back by the main temperature sensor , and controls the working conditions of the heating device and the cooling device according to the temperature rise space calculation value , so as to regulate the rigidity of the shape memory alloy porous structure and further regulate the natural frequency of the protected device, until the natural frequency of the protected device is out of resonance with the vibration load suffered.

3. The temperature and vibration coupled controller based on an additively manufactured shape memory alloy porous structure of claim 2, wherein, The preset rated working temperature interval is (T , ), wherein: is the lower limit temperature of the rated working temperature interval, and is the upper limit temperature of the rated working temperature interval. The temperature control module compares the temperature information fed back by the main temperature sensor. The temperature of the protected equipment can be determined by comparing it with the rated operating temperature range. When the comparison result is a first execution instruction is output to the heating device and the cooling device to control the heating device and the cooling device to be in the stop state. When the comparison result is , a second execution instruction is output to the heating device and the cooling device to start the cooling device and stop the heating device, so that the cooling device directly transmits a cold source to the movable object table and the shape memory alloy porous structure. At the same time, the cold source provided by the cooling device can induce the shape memory alloy porous structure to increase the deformation amount and relax the shape, so as to reduce the flow resistance of the shape memory alloy porous structure and strengthen the convection heat dissipation of the ventilation flow channel, until the temperature information fed back by the main temperature sensor is in the preset rated working temperature range . , . When the comparison result is , a third execution instruction is output to the heating device and the cooling device to start the heating device and stop the cooling device, so that the heating device directly transmits the heat source to the movable object table and the shape memory alloy porous structure, and at the same time, the heat source provided by the heating device causes the shape memory alloy porous structure to reduce the deformation amount and shrink the shape, thereby increasing the flow resistance of the shape memory alloy porous structure and weakening the convective heat dissipation of the ventilation flow channel, until the temperature information fed back by the main temperature sensor is in the preset rated working temperature range . , .

4. The temperature and vibration coupled controller based on an additive manufacturing shape memory alloy porous structure according to claim 2 or 3, characterized in that, In the rigidity regulation module, the temperature rise space calculation value is calculated by the following formula: ； In the above formula: is the lower limit temperature of the rated operating temperature range, and is the upper limit temperature of the rated operating temperature range; is the temperature information fed back by the main temperature sensor; The rigidity control module controls the working conditions of the heating device and the cooling device by comparing the size between the calculated value of the temperature rise space and the preset temperature rise space threshold value ​ When the comparison result indicates a fourth execution instruction is outputted to the heating device and the cooling device to start the heating device and stop the cooling device, so as to make the heating device provide heat to induce the shape memory alloy porous structure to have shape contraction, the restoring force to be reduced, and then the natural frequency of the protected equipment to be reduced, until the natural frequency of the protected equipment is out of resonance with the suffered vibration load. When the comparison result indicates a fifth execution instruction is outputted to the heating device and the cooling device to start the cooling device and stop the heating device, so as to induce the shape memory alloy porous structure to occur shape relaxation and increase the restoring force, and further improve the inherent frequency of the protected equipment, until the inherent frequency of the protected equipment is out of resonance with the suffered vibration load.

5. The temperature and vibration coupled controller based on an additively manufactured shape memory alloy porous structure of claim 1, wherein, The shape memory alloy porous structure comprises a porous structure body made of a double-path shape memory effect alloy; The porous structure body is made of a plurality of laminated plate-shaped porous structures, and each porous cell structure of the upper plate-shaped porous structure is one-to-one stacked on each porous cell structure of the lower plate-shaped porous structure between the adjacent two plate-shaped porous structures. Each layer of the plate-shaped porous structure comprises a plurality of circumferentially distributed porous cell structures; each of the porous cell structures comprises a substrate and two strip-shaped connectors; the two strip-shaped connectors correspond to first and second strip-shaped connectors; the middle region of the substrate is provided with a through hole; the two ends of the first and second strip-shaped connectors are respectively connected to two different sites of the through hole, and the first strip-shaped connector protrudes outward relative to the plane of the substrate, while the second strip-shaped connector is recessed inward relative to the plane of the substrate; and the first and second strip-shaped connectors are arranged in a cross shape when projected onto the plane of the substrate.

6. The temperature and vibration coupled controller based on an additively manufactured shape memory alloy porous structure of claim 5, wherein, The structural parameters of each of the porous cell structures satisfy: w = l = 10·t; d = 4·t; D = 8·t; h = 2.5·t; wherein w represents the width of the porous cell structure, l represents the length of the porous cell structure, t represents the thickness of the porous cell structure, d represents the width of the narrowest part of the substrate in the porous cell structure, D represents the width of the narrowest part of the strip-shaped connector in the porous cell structure, and h represents the height of the narrowest part of the strip-shaped connector relative to the substrate in the porous cell structure.

7. The temperature and vibration coupled controller based on an additively manufactured shape memory alloy porous structure of claim 1, wherein, The cooling device comprises an air inlet cooling device and an air outlet cooling device; The air inlet cooling device and the air outlet cooling device are arranged in the ventilation flow channel and are respectively arranged on the two sides of the shape memory alloy porous structure; the air inlet cooling device is arranged close to the air inlet of the ventilation flow channel, and the air outlet cooling device is arranged close to the air outlet of the ventilation flow channel.

8. The temperature and vibration coupled controller based on an additively manufactured shape memory alloy porous structure of claim 2, wherein, The heating device comprises first and second electrode plates; The upper wall plate of the shell is provided with a first through slot at a position corresponding to the upper end of the shape memory alloy porous structure, and the lower wall plate of the shell is provided with a second slot with an open upper end at a position corresponding to the lower end of the shape memory alloy porous structure; The first electrode plate is mounted below the first slot and connected to an external power source through a first electrode interface, and a movable object table is mounted above the first slot; The second electrode plate is arranged at the slot opening of the second slot and connected to the external power source through a second electrode interface, the vibration sensor is arranged below the second slot and connected to a signal transmission line through a vibration sensor interface, and the second electrode plate and the vibration sensor are separated by a heat insulation plate.

9. The temperature and vibration coupled controller based on an additively manufactured shape memory alloy porous structure of claim 2, wherein, The part of the ventilation flow channel between the air inlet and the shape memory alloy porous structure is an air inlet flow channel, and the part of the ventilation flow channel between the air outlet and the shape memory alloy porous structure is an air outlet flow channel; The detection device further comprises an air inlet pressure sensor, an air inlet temperature sensor, an air outlet pressure sensor, and an air outlet temperature sensor; The air inlet pressure sensor and the air inlet temperature sensor are arranged in the air inlet flow channel, and the air outlet pressure sensor and the air outlet temperature sensor are arranged in the air outlet flow channel; The temperature regulation module further comprises a flow resistance calculation module and a porous structure deformation regulation module; The air inlet pressure sensor is arranged in the air inlet flow channel close to the air inlet, detects the air inlet pressure information, and can transmit the detected air inlet pressure information to the flow resistance calculation module in real time. The air outlet pressure sensor is arranged in the air outlet flow channel close to the air outlet, is used for detecting the air outlet pressure information, and can transmit the detected air outlet pressure information to the flow resistance calculation module in real time. The air inlet temperature sensor is arranged in the air inlet flow channel close to the air inlet, is used for detecting the air inlet temperature information, and can transmit the detected air inlet temperature information to the porous structure deformation regulation and control module in real time. The air outlet temperature sensor is arranged in the air outlet flow channel close to the air outlet, is used for detecting the air outlet temperature information, and can transmit the detected air outlet temperature information to the porous structure deformation regulation and control module in real time. The porous structure deformation regulation and control module calculates the deformation ratio factor of the shape memory alloy porous structure at the current time according to the received air inlet temperature information and air outlet temperature information, and judges whether the calculated deformation ratio factor meets the requirement; when the calculated deformation ratio factor meets the requirement, the flow resistance calculation module is triggered, and the heating device or the cooling device is stopped; The deformation ratio factor is calculated by the following formula: ； In the formula: represents the outlet temperature information detected by the outlet temperature sensor at the current time; represents the inlet temperature information detected by the inlet temperature sensor at the current time; represents a preset temperature difference threshold. The flow resistance calculation module calculates the flow resistance of the shape memory alloy porous structure at the current time according to the received air inlet pressure information and air outlet pressure information, and judges whether the calculated flow resistance of the shape memory alloy porous structure is within the preset flow resistance threshold range; when the judgment result shows that the calculated flow resistance of the shape memory alloy porous structure exceeds the flow resistance threshold range, the machine is stopped; The flow resistance of the shape memory alloy porous structure is calculated by the following formula: ； In the formula: represents the flow resistance of the shape memory alloy porous structure at the current time; represents the outlet pressure information detected by the outlet pressure sensor at the current time; represents the inlet pressure information detected by the inlet pressure sensor at the current time; represents the flow rate in the ventilation flow channel.

10. A control method of the temperature and vibration coupled controller based on the shape memory alloy porous structure by additive manufacturing according to claim 2, characterized by, The method comprises the following steps: Step one, installing the temperature and vibration coupling controller on the protected equipment: The temperature and vibration coupling controller is installed on the protected equipment through the movable object table; Step two, real-time detection of temperature information of the protected equipment and inherent frequency of the protected equipment: The temperature information of the protected equipment is detected in real time by the main temperature sensor; The inherent frequency of the protected equipment is detected in real time by the vibration sensor; Step three, regulating the working temperature of the protected equipment: The temperature information of the protected equipment detected by the main temperature sensor is compared with the preset rated temperature interval to determine whether the temperature information of the protected equipment exceeds the preset rated temperature interval: When the judgment result shows that the temperature information of the protected equipment is within the preset rated temperature interval, step four is entered; When the judgment result shows that the temperature information of the protected equipment is greater than the temperature upper limit value of the preset rated temperature interval, the cooling device is started and the heating device is stopped, so that the cooling device directly transmits the cold source to the movable object table and the shape memory alloy porous structure, and at the same time, the cold source provided by the cooling device can induce the deformation amount of the shape memory alloy porous structure to increase, so that the shape of the shape memory alloy porous structure is relaxed, the flow resistance of the shape memory alloy porous structure is reduced, the convection heat dissipation of the ventilation flow channel is strengthened, and the temperature information fed back by the main temperature sensor is within the preset rated working temperature interval. When the result indicates that the temperature information of the protected equipment is less than the lower limit of the preset rated temperature range, the heating device is started and the cooling device is stopped, the heating device directly transmits heat source to the movable object table and the shape memory alloy porous structure, at the same time, the heat source provided by the heating device makes the deformation amount of the shape memory alloy porous structure decrease, the shape shrinks, thereby increasing the flow resistance of the shape memory alloy porous structure, weakening the convective heat dissipation of the ventilation flow channel, and the temperature information fed back by the main temperature sensor is in the preset rated working temperature range. Step four, judge whether the natural frequency of the protected equipment is in the resonance state with the vibration load suffered: The natural frequency of the protected equipment detected by the vibration sensor in real time is compared with the characteristic frequency of the vibration load suffered, and when the judgment result shows that the protected equipment and the vibration load suffered are in a resonance state, the temperature rise space calculation value is calculated by the following formula : ； In the above formula: is the lower limit temperature of the rated operating temperature range, and is the upper limit temperature of the rated operating temperature range; is the temperature information fed back by the main temperature sensor; Step five, regulate the natural frequency of the protected equipment: The operation of the heating device and the cooling device is controlled by comparing the size of the calculated temperature rise space with a preset temperature rise space threshold value : When the comparison result indicates the heating device is started and the cooling device is stopped, the heating device is caused to provide heat to induce the shape memory alloy porous structure to undergo shape contraction, the restoring force to decrease, and further the natural frequency of the protected device to decrease until the natural frequency of the protected device is out of resonance with the suffered vibration load. When the comparison result indicates the cooling device is started and the heating device is stopped, the cooling device is caused to provide cold energy to induce the shape memory alloy porous structure to relax, the restoring force to increase, and the natural frequency of the protected device to increase until the natural frequency of the protected device is out of resonance with the vibration load suffered.

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