Semi-active self-powered long-period vibration control device

Abstract

The invention provides a semi-active self-powered long-period vibration control device. The semi-active self-powered long-period vibration control device comprises a frame, a sliding piece, two elastic pieces, a locking actuator, a control assembly and an energy recovery assembly. The frame is provided with a first side wall and a second side wall which are parallel to each other; the sliding piece is slidably connected with the frame. The sliding piece can move back and forth in the direction from the first side wall to the second side wall; wherein one elastic piece is arranged between the sliding piece and the first side wall, and the other elastic piece is arranged between the sliding piece and the second side wall. The locking actuator is used for locking the movement of the sliding piece; the control assembly is installed on the sliding piece and used for controlling starting and stopping of the locking actuator. The energy recovery assembly is installed on the sliding piece and electrically connected with the control assembly and the locking actuator. According to the vibration control device, the control assembly sets the locking duration according to the control algorithm, the period of the vibration control device can be prolonged, the period prolonging range is wide, and the better control effect on long-period or even ultra-long-period vibration is achieved.

Description

Technical Field

[0001] This application belongs to the technical field of structural engineering. More specifically, it relates to a semi-active self-powered long-period vibration control device. Background Art

[0002] Vibration problems of structures are common in production and life. To solve various problems caused by the vibration of structures and eliminate or reduce the vibration caused by external loads, vibration control technology has developed rapidly in recent years. It is not only a hot topic in the field of civil engineering, but also in aerospace, automotive, mechanical, ocean engineering, military engineering and other fields. Appropriately installing a vibration control system in a structure can effectively reduce the dynamic response of the structure, reduce structural damage or fatigue damage, thus meeting people's requirements for the safety and comfort of the structure and achieving a reasonable balance among safety, economy and reliability. A large number of studies have shown that the application of vibration control technology in civil engineering has significant effects and important significance. It can not only prevent or reduce structural damage, improve the disaster prevention performance of structures, ensure people's life and property safety, but also extend the service life of structures, reduce the maintenance cost of structures, and greatly meet people's comfort requirements for structures under extreme conditions.

[0003] With the implementation of the national strategy of "building a strong ocean country", ocean engineering has developed rapidly, and the installed capacity of ocean engineering structures such as offshore wind turbines, ocean platforms, and offshore photovoltaics has increased rapidly. At the same time, with the development of engineering technology, ocean engineering structures are gradually moving from inshore to offshore, and floating ocean engineering structures have become a popular development direction. Floating ocean engineering structures have the advantages of environmental protection, little impact on the coastal environment, and little impact on human life on land. Floating ocean structures are of great significance for the exploitation of deep-sea resources. In addition, floating ocean wind turbines and photovoltaic power generation have the advantage of high power generation efficiency compared with onshore and inshore areas. However, due to the complex ocean environment, ocean engineering structures are subjected to the action of complex coupled loads, such as waves, currents, ice, wind, earthquakes, etc. The structure will vibrate under the action of the load, affecting the normal service of the structure and even causing structural damage or failure. Among them, wave load is the load that floating ocean engineering structures continuously bear, and its period is relatively long, usually in the range of 6-16 seconds. The floating structure will generate vibrations with a relatively long period under the action of wave load, and the longest vibration period can exceed 100 seconds. This long-period vibration will have an adverse impact on the normal service of the structure and cause structural fatigue problems, greatly reducing the reliability. Therefore, a technology is needed to effectively suppress the long-period vibration problem of ocean engineering structures. In addition, the long-period vibration problem of structures not only exists in ocean engineering structures, but is also relatively common in other types of structures, such as super high-rise building structures, large-span flexible structures, and ultra-long pendulum structures. However, traditional technologies are difficult to produce good suppression effects on such long-period vibration problems.

[0004] Structural vibration control technology is mainly divided into the following four aspects: active control, passive control, semi-active control, and hybrid control. Among them, the research on passive control technology has been relatively mature. Devices used for passive tuned energy absorption, such as tuned mass dampers (TMDs), have been applied in many civil engineering structures. The principle of TMD control is to make the frequency of the sub-structure, i.e., the damper, the same as or close to that of the main structure, i.e., the controlled structure, so that the sub-structure resonates with the main structure, and the vibration energy of the main structure is dissipated through the internal damping mechanism of the sub-structure, thereby reducing the dynamic response of the main structure and achieving the purpose of vibration control. However, since it is difficult for a tuned mass damper to adjust its frequency to be the same as the long-period vibration (low-frequency vibration) of the controlled structure, it is difficult to produce a good inhibitory effect on long-period vibration. Even through theoretical design, increasing the stroke of the damper to extend its period will result in a huge volume of the damper, making it difficult to manufacture and install in actual engineering.

[0005] In addition, the period (frequency) of a structure during service is usually not fixed. For example, in a pendulum structure, the pendulum length of a pendulum hoist changes continuously during use, so the period changes continuously. The periods (frequencies) of other types of structures also change during use. After a traditional passive control device is designed and installed according to the structure period, its period (frequency) cannot be adjusted. Once the periods (frequencies) of the control device and the controlled structure are no longer the same, even with a small deviation, the control effect of the control device will be greatly reduced. Some existing active and semi-active technologies can achieve period (frequency) adjustment to a certain extent, but the adjustment range is limited and cannot meet the needs of long-period vibration control. Moreover, the existing active and semi-active technologies rely on external electrical energy. Once the power supply fails, the control device will fail and even amplify the structural vibration, having an adverse impact on the structure.

[0006] In summary, for the problem of long-period vibration, the existing technologies mainly have the following five deficiencies: First, the existing technologies have poor control effects on the long-period vibration of structures; Second, even if the existing technologies can produce a certain control effect on long-period vibration theoretically, the control device often requires a very large stroke, resulting in a very large designed volume of the device and being difficult to manufacture and install in actual engineering; Third, it is difficult for the existing passive control technologies to adjust the period (frequency) of the control device after installation and use. Once the damper and the controlled structure are out of tune, the control effect will be greatly reduced; Fourth, some existing active or semi-active technologies have the function of period (frequency) adjustment, but their adjustment range is limited and it is difficult to meet the needs of long-period vibration control; Fifth, the existing active and semi-active devices rely on external energy sources, with low stability and robustness. Summary of the Invention

[0007] The purpose of the embodiment of the present application is to provide a semi-active self-powered long-period vibration control device to solve the technical problems existing in the prior art that traditional vibration control devices are difficult to effectively control the long-period vibration of structures; traditional vibration control devices require long strokes and large volumes for long-period vibration, making them difficult to manufacture and install; and traditional vibration control devices cannot adjust the period (frequency) after design and installation.

[0008] To achieve the above object, the technical solution adopted in the present application is: to provide a semi-active self-powered long-period vibration control device, including a frame, a sliding member, two elastic members, a locking actuator, a control component, and an energy recovery component; the frame has a first side wall and a second side wall that are parallel to each other; the sliding member is slidably connected to the frame; the sliding member can reciprocally move along the direction from the first side wall to the second side wall; one of the elastic members is arranged between the sliding member and the first side wall, and the other elastic member is arranged between the sliding member and the second side wall; the locking actuator is used to lock the movement of the sliding member; the control component is installed on the sliding member, and the control component is used to control the start and stop of the locking actuator and set the locking duration of the locking actuator according to different control algorithms; the energy recovery component is installed on the sliding member and is electrically connected to the control component and the locking actuator respectively; the energy recovery component is used to convert the mechanical energy generated by the movement of the sliding member into electrical energy required for the operation of the locking actuator.

[0009] Optionally, a sliding optical axis is provided on the frame, one end of the sliding optical axis is connected to the first side wall, and the other end of the sliding optical axis is connected to the second side wall; the sliding member is slidably connected to the sliding optical axis.

[0010] Optionally, a rack is provided on the frame, and the length direction of the rack is parallel to the length direction of the sliding optical axis; the locking actuator includes a locking rotating shaft, a locking gear, and an electromagnetic brake; the locking rotating shaft is rotatably connected to the sliding member; the locking gear is fixed to one end of the locking rotating shaft and meshes with the rack; the electromagnetic brake can lock the rotation of the locking rotating shaft.

[0011] Optionally, the electromagnetic brake includes a friction plate and an electromagnet; the friction plate is installed on the locking rotating shaft; the electromagnet is installed on the sliding member; the electromagnet can adsorb the friction plate after being energized.

[0012] Optionally, a through hole is provided on the electromagnet, the locking rotating shaft passes through the through hole, and the diameter of the through hole is larger than the outer diameter of the locking rotating shaft; the friction plate is sleeved on the rotating shaft and is fixedly connected to the locking rotating shaft; there is a braking gap between the friction plate and the electromagnet.

[0013] Optionally, the control component includes a data acquisition unit, a data processing unit, and a controller; the data acquisition unit is configured to acquire the rotation angle data of the locking rotating shaft; the data processing unit is electrically connected to the data acquisition unit and is configured to process the rotation angle data and obtain the linear travel and speed of the sliding member; the controller is respectively electrically connected to the data processing unit and the locking actuator; when the speed acquired by the controller is equal to 0, the controller sends a locking instruction to the locking actuator, and the sliding member stops moving; after the controller completes the locking of the locking duration according to different control algorithms, the controller sends an unlocking instruction to the locking actuator, and the sliding member resumes moving.

[0014] Optionally, the energy recovery component includes an energy recovery rotating shaft, an energy recovery gear, and an electromagnetic motor; the energy recovery rotating shaft is rotatably connected to the sliding member; the energy recovery gear is fixed to one end of the energy recovery rotating shaft and meshes with the rack; when the energy recovery rotating shaft rotates, it drives the electromagnetic motor to generate electric energy.

[0015] Optionally, the energy recovery component further includes an energy storage member, the energy storage member is disposed in the control component, the energy storage member is electrically connected to the electromagnetic motor, and the energy storage member is configured to store the electric energy generated by the electromagnetic motor.

[0016] Optionally, the semi-active self-powered long-period vibration control device further includes a linear bearing, and the linear bearing is installed on the sliding member and is slidably connected to the sliding optical axis.

[0017] Optionally, a mass block is added to the sliding member.

[0018] The beneficial effects of the semi-active self-powered long-period vibration control device provided by the present application are as follows:

[0019] (1) Compared with the prior art, in the present application, the locking actuator can lock the movement of the sliding member, and the control component can set the locking duration of the locking actuator according to different control algorithms, extending the period of the vibration control device, and the period extension range is wide, and it has a better control effect on long-period and even ultra-long-period vibrations.

[0020] (2) Compared with the prior art, in the present application, since the locking actuator and the control component can directly extend the period of the vibration control device, therefore, it is not necessary to increase the stroke of the sliding member to directly extend its period, and the period of the vibration control device can be extended and adjusted to match the period of the controlled object under the condition that the stroke of the vibration control device is limited and the volume is small.

[0021] (3) Compared with the prior art, in the present application, by setting up an energy recovery component to achieve self-power supply of the device, and finally achieving the semi-active control effect of long-term self-power supply, it gets rid of the dependence on external energy sources and ensures the stability and robustness of the vibration control device.

[0022] (4) Compared with the prior art, the present application adopts semi-active control technology to adjust the device period to match the period of the controlled object according to the device state feedback, which maximally ensures the control effect, and can achieve different control effects only by adjusting the control algorithm as needed, with greater robustness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Schematic three-dimensional structure of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application Figure 1 ;

[0025] Figure 2 Schematic three-dimensional structure of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application Figure 2 ;

[0026] Figure 3 Front view structure schematic diagram of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application;

[0027] Figure 4 Top view structure schematic diagram of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application;

[0028] Figure 5 Left view structure schematic diagram of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application;

[0029] Figure 6 Rear view structure schematic diagram of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application;

[0030] Figure 7 Installation schematic diagram of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application in the controlled structure;

[0031] Figure 8 Installation side view of the semi-active self-powered long-period vibration control device provided by the embodiment of the present application in the controlled structure

[0032] Figure 9 This is the implementation flowchart of the locking module in the semi-active self-powered long-period vibration control device provided by the embodiments of the present application;

[0033] Figure 10 This is the working principle diagram of the locking module in the semi-active self-powered long-period vibration control device provided by the embodiments of the present application;

[0034] Figure 11 This is the time history curve of the movement of the sliding member under the harmonic excitation test of the semi-active self-powered long-period vibration control device provided by the embodiments of the present application and the traditional control device.

[0035] Among them, the reference numerals in the figure are as follows:

[0036] 10 - Frame; 11 - First side wall; 12 - Second side wall; 13 - Sliding optical axis; 14 - Rack;

[0037] 20 - Sliding member; 21 - Top plate; 22 - Front plate; 23 - Side plate;

[0038] 30 - Elastic member;

[0039] 41 - Locking rotating shaft; 42 - Locking gear; 43 - Electromagnet; 44 - Friction plate;

[0040] 50 - Control component;

[0041] 61 - Energy recovery rotating shaft; 62 - Energy recovery gear; 63 - Electromagnetic motor;

[0042] 70 - Linear bearing;

[0043] 80 - Data acquisition unit;

[0044] 90 - Structure to be controlled. Detailed implementation manners

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0047] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0049] Please refer to Figure 1 and Figure 3 For the semi-active self-powered long-period vibration control device provided by the embodiments of the present application. The semi-active self-powered long-period vibration control device includes a frame 10, a sliding member 20, two elastic members 30, a locking actuator, and a control component 50; the frame 10 has a first side wall 11 and a second side wall 12 that are parallel to each other; the sliding member 20 is slidably connected to the frame 10; the sliding member 20 can reciprocally move along the direction from the first side wall 11 to the second side wall 12; one of the elastic members 30 is disposed between the sliding member 20 and the first side wall 11, and the other elastic member 30 is disposed between the sliding member 20 and the second side wall 12; the locking actuator is used to lock the movement of the sliding member 20; the control component 50 is mounted on the sliding member 20, and the control component 50 is used to control the start and stop of the locking actuator and set the locking duration of the locking actuator according to different control algorithms; the energy recovery component is mounted on the sliding member 20 and is electrically connected to the control component 50 and the locking actuator respectively; the energy recovery component is used to convert the mechanical energy generated by the movement of the sliding member 20 into electrical energy required for the operation of the locking actuator.

[0050] Compared with the prior art, for the semi-active self-powered long-period vibration control device provided by the present application, in the present application, the locking actuator can lock the movement of the sliding member 20, and the control component 50 can set the locking duration of the locking actuator according to different control algorithms, extending the period of the vibration control device, and the period extension range is wide, and it has a better control effect on long-period and even ultra-long-period vibrations.

[0051] In this application, since the locking actuator and the control component 50 can directly extend the period of the vibration control device, it is possible to directly extend the period without increasing the stroke of the sliding member 20. It is possible to extend and adjust the period of the vibration control device to match the period of the controlled object under the conditions of limited stroke and small volume of the vibration control device.

[0052] In an embodiment of the present application, the device self-power supply is realized by setting up an energy recovery component, and finally the semi-active control effect of self-power supply with a long period is realized, getting rid of the dependence on external energy sources and ensuring the stability and robustness of the vibration control device.

[0053] In an embodiment of the present application, by adopting semi-active control technology, the period of the device is adjusted according to the device state feedback to match the period of the controlled object, ensuring the control effect to the greatest extent, and different control effects can be achieved only by adjusting the control algorithm as needed, with greater robustness.

[0054] In an embodiment of the present application, please refer to Figure 2 and Figure 6 , a sliding optical axis 13 is provided on the frame 10. One end of the sliding optical axis 13 is connected to the first side wall 11, and the other end of the sliding optical axis 13 is connected to the second side wall 12; the sliding member 20 is slidably connected to the sliding optical axis 13.

[0055] It can be understood that the sliding optical axis 13 penetrates through the sliding member 20. The elastic member 30 can be a spring, and the spring is sleeved on the sliding optical axis 13. One spring is provided on each side of the sliding member 20, which can provide a stiffness restoring force for the reciprocating movement of the sliding member 20.

[0056] In an embodiment of the present application, please refer to Figure 1 and Figure 4 , a rack 14 is provided on the frame 10. The length direction of the rack 14 is parallel to the length direction of the sliding optical axis 13; the locking actuator includes a locking rotating shaft 41, a locking gear 42 and an electromagnetic brake; the locking rotating shaft 41 is rotatably connected to the sliding member 20; the locking gear 42 is fixed to one end of the locking rotating shaft 41 and meshes with the rack 14; the electromagnetic brake can lock the rotation of the locking rotating shaft 41.

[0057] In an embodiment of the present application, please refer to Figure 2 and Figure 6 , the electromagnetic brake includes a friction plate 44 and an electromagnet 43; the friction plate 44 is installed on the locking rotating shaft 41; the electromagnet 43 is installed on the sliding member 20; the electromagnet 43 can adsorb the friction plate 44 after being energized.

[0058] Specifically, the electromagnet 43 is fixed on the sliding member 20 by bolts; the electromagnet 43 is electrically connected to the control assembly 50, and the control assembly 50 outputs an electrical signal to control the energization and de-energization of the electromagnet 43, thereby realizing the locking and unlocking functions of the locking actuator.

[0059] In this embodiment, when the electromagnet 43 is energized, the electromagnet 43 generates magnetism and attracts the friction plate 44. At this time, the locking rotating shaft 41 cannot rotate relative to the sliding member 20, so that the locking gear 42 stops rotating, and the sliding member 20 cannot continue to move on the frame 10, thereby realizing the locking of the sliding member 20; when the electromagnet 43 is de-energized, the magnetism of the electromagnet 43 disappears, the electromagnet 43 is separated from the friction plate 44, and the locking rotating shaft 41 can continue to rotate relative to the frame 10, thereby unlocking the sliding member 20.

[0060] In an embodiment of the present application, the electromagnet 43 is provided with a through hole, the locking rotating shaft 41 passes through the through hole, and the diameter of the through hole is larger than the outer diameter of the locking rotating shaft 41; the friction plate 44 is sleeved on the rotating shaft and fixedly connected to the locking rotating shaft 41; there is a braking gap between the friction plate 44 and the electromagnet 43.

[0061] In this embodiment, by providing a through hole in the electromagnet 43 and the diameter of the through hole being larger than the outer diameter of the locking rotating shaft 41, that is, the locking rotating shaft 41 does not contact the electromagnet 43, it is possible to avoid interference of the electromagnet 43 with the rotation of the locking rotating shaft 41 when the locking actuator is not working. It can be understood that when the locking rotating shaft 41 rotates, the friction plate 44 will also rotate accordingly. By setting a braking gap between the friction plate 44 and the electromagnet 43, it is possible to avoid interference of the electromagnet 43 with the rotation of the friction plate 44 when the locking actuator is not working, thereby ensuring that the rotation of the locking rotating shaft 41 is not affected.

[0062] In an embodiment of the present application, the plate surface of the friction plate 44 is parallel to the adsorption surface of the electromagnet 43 and perpendicular to the axis of the locking rotating shaft 41. When the locking actuator works, the electromagnet 43 is in surface contact with the friction plate 44, making the adsorption between the electromagnet 43 and the friction plate 44 more firm and realizing the rapid locking of the locking rotating shaft 41.

[0063] In an embodiment of the present application, please refer to Figure 2 and Figure 6, the control component 50 includes a data acquisition unit 80, a data processing unit, and a controller; the data acquisition unit 80 is used to acquire the angular data of the locking rotating shaft 41; the data processing unit is electrically connected to the data acquisition unit 80 and is used to process the angular data and obtain the linear travel and speed of the sliding member 20; the controller is respectively electrically connected to the data processing unit and the locking actuator; when the speed obtained by the controller is equal to 0, the controller sends a locking instruction to the locking actuator, and the sliding member 20 stops moving; after the controller completes the locking of the locking duration according to different control algorithms, the controller sends an unlocking instruction to the locking actuator, and the sliding member 20 resumes moving.

[0064] In this embodiment, the locking actuator, the data acquisition unit 80, the data processing unit, and the controller constitute a locking module; the controller is connected to the electromagnet 43 in the electromagnetic brake through a wire, and the controller outputs an electrical signal to control the electromagnetic brake to achieve locking and restoration; by setting the locking module, the period of the vibration control device can be extended and adjusted; the frame 10, the sliding optical axis 13, the elastic member 30, the rack 14, and the sliding member 20 constitute a control force module, and an effective control force is output through the control force module.

[0065] In an embodiment of the present application, please refer to Figure 2 and Figure 5 , the energy recovery component includes an energy recovery rotating shaft 61, an energy recovery gear 62, and an electromagnetic motor 63; the energy recovery rotating shaft 61 is rotatably connected to the sliding member 20; the energy recovery gear 62 is fixed to one end of the energy recovery rotating shaft 61 and meshes with the rack 14; when the energy recovery rotating shaft 61 rotates, it drives the electromagnetic motor 63 to generate electric energy.

[0066] In this embodiment, when the sliding member 20 moves, the rack 14 meshes with the energy recovery gear 62, driving the energy recovery gear 62 to rotate, and then driving the energy recovery rotating shaft 61 to rotate. When the energy recovery rotating shaft 61 rotates, it cuts the magnetic induction line, causing the electromagnetic motor 63 to generate electric energy. The controller is connected to the electromagnetic motor 63 through a wire, and the controller can control the electromagnetic motor 63 to achieve energy recovery.

[0067] In an embodiment of the present application, the energy recovery component further includes an energy storage member. The energy storage member is arranged in the control component 50. The energy storage member is electrically connected to the electromagnetic motor 63 through a wire, and the energy storage member is used to store the electric energy generated by the electromagnetic motor 63.

[0068] It can be understood that the energy storage member is respectively electrically connected to the controller, the data acquisition unit 80, the data processing unit, and the electromagnet 43, and can provide the electric energy required for the operation of the controller, the data acquisition unit 80, the data processing unit, and the electromagnet 43. Specifically, the energy storage member can adopt a micro battery.

[0069] In this embodiment, the data acquisition unit 80 may specifically adopt an encoder. The encoder is coaxially connected to the locking rotating shaft 41 and is used to acquire the rotation angle data of the locking rotating shaft 41. The rotation angle data may be the angle rotated by the locking rotating shaft 41 within a certain period of time.

[0070] It can be understood that both the energy recovery gear 62 and the locking gear 42 are engaged with the same rack 14. Therefore, the linear velocities of the energy recovery rotating shaft 61 and the locking rotating shaft 41 are equal, and finally the moving stroke and speed of the sliding member 20 are also equal. Therefore, the encoder can also be arranged on the energy recovery rotating shaft 61 to acquire the rotation angle data of the energy recovery rotating shaft 61, and then the moving stroke and speed of the sliding member 20 can be obtained through the data processing unit.

[0071] In an embodiment of the present application, please refer to Figure 2 and Figure 6 together. The semi-active self-powered long-period vibration control device further includes a linear bearing 70. The linear bearing 70 is installed on the sliding member 20 and is slidably connected to the sliding optical axis 13.

[0072] In this embodiment, by setting the linear bearing 70, the sliding member 20 can be supported, and at the same time, the resistance when the sliding member 20 slides relative to the sliding optical axis 13 can be reduced, the energy loss during the movement of the sliding member 20 is reduced, which is beneficial to meeting the requirements of long-period vibration control.

[0073] In an embodiment of the present application, as Figure 2 shown, the sliding member 20 is a semi-enclosed box structure composed of a top plate 21, a front plate 22 and two side plates 23; the sliding optical axis 13 penetrates through the two side plates 23, and a linear bearing 70 is installed on each of the two side plates 23; the locking rotating shaft 41 and the energy recovery rotating shaft 61 are both rotatably connected to the front plate 22; the control assembly 50, the electromagnet 43 and the electromagnetic motor 63 are fixed to the front plate 22 by bolts; the control assembly 50 is located between the electromagnet 43 and the electromagnetic motor 63.

[0074] In this embodiment, a mass block is added to the sliding member 20 to adjust the mass ratio of the vibration control device; furthermore, the amplitude of the reciprocating movement of the sliding member 20 can be adjusted. Specifically, the mass block is added to the top plate 21 of the sliding member 20.

[0075] In an embodiment of the present application, the semi-active self-powered long-period vibration control device is installed on the controlled structure 90. Specifically, please refer to Figure 7 and Figure 8 together. The bottom of the frame 10 is connected to the controlled structure 90 by bolts. A linear control force is generated by the reciprocating movement of the sliding member 20 on the frame 10, and this linear control force is then transmitted to the controlled structure 90 through the frame 10.

[0076] Please refer to Figure 9 and Figure 10 simultaneously. The working principle of the semi-active self-powered long-period vibration control device provided in this embodiment is as follows: The data acquisition unit 80 acquires the angular displacement data of the energy recovery gear 62. The angular displacement data is processed by the data processing unit to obtain the linear stroke and speed of the slider 20. The data processing unit transmits the processed linear stroke and speed signals to the controller. The controller judges the magnitude of the speed signal. When the speed is not equal to 0, the slider 20 maintains its original state. When the speed is equal to 0, the controller issues a locking instruction, which is executed by the locking actuator (the electromagnet 43 is energized to adsorb the friction plate 44), so that the slider 20 is locked and the speed is maintained at 0. After the controller locks the locking duration according to different control algorithms, it issues an unlocking command to make the locking actuator unlock (the electromagnet 43 is de-energized and separated from the friction plate 44), so that the slider 20 is released and returns to its original motion state.

[0077] Figure 11 Fig. shows the comparison of the time history curves of the stroke of the slider 20 between the semi-active self-powered long-period vibration control device provided in the embodiment of the present application and the traditional control device under the simple harmonic excitation test. The ideal stroke is the time history curve that produces the best control effect on the controlled structure 90, but this situation requires too large a stroke of the slider 20 and is not applicable to this embodiment. When the device parameters are selected to be certain, the traditional control device has no locking module, and the phase of the stroke of the slider 20 is quite different from the ideal stroke. At this time, no control effect can be produced, and even the vibration response of the controlled structure 90 may be amplified. This embodiment adopts a vibration control device with a locking module. Due to the existence of the locking duration, its phase is basically the same as the ideal phase. The horizontal section of the time history in the figure is the period when locking occurs. At this time, the speed of the slider 20 remains 0 and it remains locked and immobile.

[0078] The semi-active self-powered long-period vibration control device provided in the embodiment of the present application can be applied but is not limited to the fields of long-period and ultra-long-period vibration control, long-period vibration of floating ocean structures, long-period vibration control of super-high-rise structures, long-period vibration of large-span flexible structures, long-period vibration control of long single pendulum structures, etc.

[0079] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A semi-active self-powered long-period vibration control device, characterized in that, it includes: A frame having a first side wall and a second side wall that are parallel to each other; A sliding member slidably connected to the frame; The sliding member can reciprocate along the direction from the first side wall to the second side wall; Two elastic members, one elastic member is arranged between the sliding member and the first side wall, and the other elastic member is arranged between the sliding member and the second side wall; A locking actuator for locking the movement of the sliding member; A control component installed on the sliding member, the control component is used to control the start and stop of the locking actuator, and set the locking duration of the locking actuator according to different control algorithms; And An energy recovery component installed on the sliding member and electrically connected to the control component and the locking actuator respectively; the energy recovery component is used to convert the mechanical energy generated by the movement of the sliding member into electrical energy required for the operation of the locking actuator.

2. The semi-active self-powered long-period vibration control device according to claim 1, characterized in that, A sliding optical axis is provided on the frame, one end of the sliding optical axis is connected to the first side wall, and the other end of the sliding optical axis is connected to the second side wall; the sliding member is slidably connected to the sliding optical axis.

3. The semi-active self-powered long-period vibration control device according to claim 2, characterized in that, A rack is provided on the frame, and the length direction of the rack is parallel to the length direction of the sliding optical axis; The locking actuator includes a locking rotating shaft, a locking gear and an electromagnetic brake; the locking rotating shaft is rotatably connected to the sliding member; the locking gear is fixed to one end of the locking rotating shaft and meshes with the rack; the electromagnetic brake can lock the rotation of the locking rotating shaft.

4. The semi-active self-powered long-period vibration control device according to claim 3, characterized in that, The electromagnetic brake includes: A friction plate installed on the locking rotating shaft; and An electromagnet installed on the sliding member; the electromagnet can adsorb the friction plate after being energized.

5. The semi-active self-powered long-period vibration control device according to claim 4, characterized in that, A through hole is provided on the electromagnet, the locking rotating shaft passes through the through hole, and the diameter of the through hole is larger than the outer diameter of the locking rotating shaft; The friction plate is sleeved on the rotating shaft and fixedly connected to the locking rotating shaft; there is a braking gap between the friction plate and the electromagnet.

6. The semi-active self-powered long-period vibration control device according to claim 5, characterized in that, The control component includes a data acquisition unit, a data processing unit and a controller; the data acquisition unit is used to acquire the rotation angle data of the locking rotating shaft; the data processing unit is electrically connected to the data acquisition unit and is used to process the rotation angle data and obtain the linear stroke and speed of the sliding member; the controller is electrically connected to the data processing unit and the locking actuator respectively; When the speed acquired by the controller is equal to 0, the controller sends a locking instruction to the latching actuator, and the sliding member stops moving; after the controller completes the locking of the latching duration according to different control algorithms, the controller sends an unlocking instruction to the latching actuator, and the sliding member resumes moving.

7. The semi-active self-powered long-period vibration control device according to claim 3, wherein, the energy recovery assembly includes an energy recovery rotating shaft, an energy recovery gear and an electromagnetic motor; the energy recovery rotating shaft is rotatably connected to the sliding member; the energy recovery gear is fixed to one end of the energy recovery rotating shaft and meshes with the rack; when the energy recovery rotating shaft rotates, it drives the electromagnetic motor to generate electric energy.

8. The semi-active self-powered long-period vibration control device according to claim 7, wherein, the energy recovery assembly further includes an energy storage member, the energy storage member is arranged in the control assembly, the energy storage member is electrically connected to the electromagnetic motor, and the energy storage member is used for storing the electric energy generated by the electromagnetic motor.

9. The semi-active self-powered long-period vibration control device according to claim 2, wherein, the semi-active self-powered long-period vibration control device further includes a linear bearing, the linear bearing is installed on the sliding member and is slidably connected to the sliding optical axis.

10. The semi-active self-powered long-period vibration control device according to any one of claims 1-9, wherein, a mass block is additionally installed on the sliding member.

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