An intelligent adjustment system for electromagnetic vibration absorbers

Abstract

The present invention discloses an intelligent adjustment system suitable for an electromagnetic shock absorber, comprising a sensor assembly device, an electromagnetic control system, an electromagnetic anti-friction device and a magnetorheological fluid shock absorber; the sensor assembly device is used to detect the vibration condition of the current vibrating body; the electromagnetic control system is used to receive and process the vibration condition sensed by the sensor assembly device, make corresponding analysis, and generate an electrical signal to feed back to the electromagnetic anti-friction device and the magnetorheological fluid shock absorber; the electromagnetic anti-friction device uses a magnetic field generated by electromagnetic force to offset the horizontal displacement and vibration of the vibrating body; the magnetorheological fluid shock absorber is constructed to offset and reduce the vibration of the vibrating body in the vertical and horizontal directions. The present invention enables the shock absorber to make intelligent self-adjustment, making its application scenarios more extensive.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical vibration reduction devices, and in particular relates to an intelligent adjustment system suitable for electromagnetic vibration reducers. Background Art

[0002] The application of shock absorbers has become more and more extensive with the advancement of industrial civilization. At present, shock absorbers are commonly used in various mechanical equipment, such as automobile chassis vibration reduction to provide a more comfortable driving experience; or used in large-scale engineering equipment to provide a more stable construction condition, reduce the difficulty of construction, and improve construction accuracy; they are also used in various large buildings or indoor structures to ensure the safety and stability of the building.

[0003] The most common shock absorbers mainly use springs as damping components. Spring components are easy to produce and use, and there are many specifications. They can be combined to form systems suitable for various vibration reduction parameters. However, the deformation of the spring is relatively fixed, the damping coefficient cannot be changed, and there is also the problem of resonance with the system. There are also shock absorbers that use oil and fat liquids as filling liquids to produce damping effects, which improves the smoothness of vibration reduction. At the same time, the damping characteristics of the shock absorber can be changed by changing the internal pressure of the liquid storage cylinder through an external adjustment device; however, this adjustment method takes a long time, and the accuracy and range of adjustment are still restricted by the physical properties of the filling liquid.

[0004] As described in CN111878537A, US2021061146A1, and US2021039468A1, most of the currently disclosed adjustable shock absorber technical solutions are still aimed at traditional spring type, air filling type or liquid filling type, and are achieved by changing the internal space or internal pressure of the shock absorber. Simple adjustment usually adopts manual single adjustment method, which takes a long time to operate and the accuracy is difficult to grasp; if electronic adjustment is adopted, it is still subject to mechanical physical characteristics and cannot be adjusted instantly and multiple times. Therefore, for high-frequency irregular vibration systems, such as cars running at high speed on rugged roads, or high-speed rotating speed turbine systems, their vibration reduction effect is also not ideal.

[0005] In addition, the processing speed of current electronic control systems has been greatly improved, and the accuracy of various sensor devices and modular block design have provided sufficient technical conditions for the establishment of low-cost intelligent processing systems; at the same time, the optimization algorithms of machine learning are constantly being upgraded, which also provides favorable conditions for the system to perform self-optimization and iteration. Summary of the invention

[0006] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide an intelligent adjustment system suitable for electromagnetic shock absorbers, which can enable the shock absorbers to perform intelligent self-adjustment and expand their application scenarios.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An intelligent adjustment system for an electromagnetic vibration damper, comprising a sensor assembly device 108, an electromagnetic control system, an electromagnetic anti-friction device and a magnetorheological fluid vibration damping device 106;

[0009] The sensor assembly device 108 is used to detect the current vibration condition of the vibrating body 107; the electromagnetic control system is used to receive and process the vibration condition sensed by the sensor assembly device 108, make corresponding analysis, and generate electrical signals to feed back to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device 106; the electromagnetic anti-friction device uses the magnetic field generated by the electromagnetic force to offset the horizontal displacement and vibration of the vibrating body 107; the magnetorheological fluid vibration reduction device 106 is constructed to offset and reduce the vibration of the vibrating body 107 in the vertical and horizontal directions.

[0010] The sensor assembly device 108 combines multiple sensors, including one or more of the following sensors: a three-axis gyroscope sensor, an acceleration sensor, an angle sensor, a displacement sensor, a vibration sensor, and a gravity sensor.

[0011] The electromagnetic control system includes an access port module and a communication module for accessing the sensor assembly device 108 and obtaining feedback data from the sensor; a central processing unit for processing sensor data analysis and issuing corresponding control instructions to the electromagnetic anti-friction device and magnetorheological fluid vibration reduction device 106; a memory including a preset program executed by the central processing unit; and an internal database for storing the data sent by the sensor assembly and the instructions issued by the central processing unit in the database; an output module for sending control instructions to the electromagnetic anti-friction device and magnetorheological fluid vibration reduction device 106.

[0012] The electromagnetic anti-friction device includes an electromagnetic generating device, which includes an upper magnetic pole plate 102 and a lower magnetic pole plate 102; the electromagnetic generating device generates a magnetic field after being energized, and causes mutual attraction between the upper magnetic pole plate 105 and the lower magnetic pole plate 102; an attached friction plate, wherein the upper friction plate 104 is installed on the upper magnetic pole plate 105, the lower friction plate 103 is installed on the lower magnetic pole plate 102, and the upper friction plate 104 and the lower friction plate 103 are located between the upper magnetic pole plate 105 and the lower magnetic pole plate 102, for increasing the friction between the contact surfaces and buffering the vibration in the horizontal direction; a peripheral control circuit for connecting the intelligent adjustment system; a support structure 101 for assisting the electromagnetic anti-friction device to remain in a relatively stable preset position.

[0013] The electromagnetic anti-friction device includes a working power supply, the voltage of which is controlled and changed by the peripheral control circuit. The peripheral control circuit adjusts the voltage of the working power supply according to instructions, thereby adjusting the voltage applied to the electromagnetic generating device, thereby generating an adjustable magnetic force on the electromagnetic generating device.

[0014] The magnetorheological fluid vibration damping device 106 includes one or more damper cylinders, each of which contains a piston, a piston connecting rod, a stroke sensor, an electromagnetic fluid 404 and an electronic control circuit; the magnetorheological fluid vibration damping device 106 includes a damper cylinder; the piston can move in a first direction along the inner wall of the damper cylinder; the piston connecting rod is fixed to the vibration component assembly and pushes and pulls the piston to move; the damper cylinder is fixed to a fixed static structure; the piston divides the space in the damper cylinder into a first space and a second space; the first space and the second space in the damper cylinder are both filled with the electromagnetic fluid 404; a sealing ring is provided between the piston and the inner wall of the damper cylinder; the piston has a micro-channel connecting the first space and the second space of the damper cylinder, and can allow the electromagnetic fluid 404 to pass at a reasonable flow rate.

[0015] The magnetorheological fluid vibration reduction device 106 includes an electronic control circuit; the output voltage of the electronic control circuit is changed by the electromagnetic control system; the internal structure of the piston has a coil with multiple turns; and the coil is connected to the electronic control circuit.

[0016] The electromagnetic fluid 404 in the magnetorheological fluid vibration damping device 106 contains magnetic particles; the electronic control circuit adjusts the voltage applied to the coil by sending a pulse signal, thereby forming a dynamic induced magnetic field around the coil and further changing the arrangement of the magnetic particles; the magnetic particles will be arranged in an orderly manner in a second direction perpendicular to the first direction under the action of the magnetic field, further changing the damping characteristics of the electromagnetic fluid 404, thereby adjusting the effect of the electromagnetic fluid 404 flowing in the first space and the second space of the shock absorber cylinder, and further changing the vibration damping characteristics of the intelligent adjustment system of the electromagnetic shock absorber.

[0017] Beneficial effects of the present invention:

[0018] Each part of the technical solution of the intelligent adjustment system of the electromagnetic vibration absorber of the present invention can be manufactured in a modular manner, and its specific size and technical accuracy can be flexibly changed according to actual conditions;

[0019] The intelligent adjustment system of the electromagnetic shock absorber provides a 6-axis vibration reduction function, which is more suitable for vibrations in irregular directions;

[0020] The electromagnetic shock absorber used in the intelligent adjustment system of the electromagnetic shock absorber has a rapid effect system controlled by the electronic system, which can quickly adjust to different vibration changes to better achieve the vibration reduction effect;

[0021] The intelligent adjustment system of the electromagnetic shock absorber is assisted by a series of sensors for monitoring. It can cooperate with the computer's machine learning method to autonomously optimize and iterate the control parameters within the system to achieve a more intelligent and more effective vibration reduction effect, which is much better than the existing manual adjustment or small-scale automatic adjustment system solutions.

[0022] The present invention proposes a more feasible technical solution for more advanced and intelligent vibration reduction needs, and meets the current development needs for intelligent and information-based industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of Example 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of Example 3 of the present invention.

[0025] Figure 3 Schematic diagram of the relationship between the magnetic field force and friction force of the electromagnetic anti-friction device.

[0026] Figure 4 Schematic diagram of the internal structure of the magnetorheological fluid vibration reduction device.

[0027] Figure 5 Schematic diagram of the working principle of the magnetorheological fluid vibration reduction device.

[0028] Figure 6 Illustration of the vibration reduction effect (amplitude-time) over time through machine learning.

[0029] Attached Figure 1 Description of serial numbers: 101-support structure; 102-lower magnetic pole plate; 103-lower friction plate; 104-upper friction plate; 105-upper magnetic pole plate; 106-magnetorheological fluid vibration reduction device; 107-vibrating body; 108-sensor assembly device;

[0030] Attached Figure 4 Description of serial numbers: 401- piston connecting rod moves in the first direction; 402- electromagnetic fluid flows through the piston flow channel; 403- magnetic field inside the piston; 404- electromagnetic fluid;

[0031] Attached Figure 5 Explanation of serial numbers: 501-disordered distribution of electromagnetic particles under weak magnetic field; 502-ordered arrangement of electromagnetic particles under strong magnetic field; DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] Embodiment 1:

[0034] See attached Figure 1 , an intelligent adjustment system suitable for electromagnetic vibration dampers, characterized in that the intelligent adjustment system comprises: a sensor assembly device 108, an electromagnetic control system, an electromagnetic anti-friction device and a magnetorheological fluid vibration damping device 106; the sensor assembly is used to detect the vibration condition of the current vibration body 107; the electromagnetic control system is used to receive and process the vibration condition sensed by the sensor assembly, make corresponding analysis, and generate an electrical signal to feed back to the electromagnetic anti-friction device and the magnetorheological fluid vibration damping device 106; the electromagnetic anti-friction device uses a magnetic field generated by electromagnetic force to offset the horizontal displacement and vibration of the vibration body 107; the magnetorheological fluid vibration damping device 106 is constructed to offset and reduce the vibration of the vibration body 107 in the vertical and horizontal directions;

[0035] The sensor assembly device 108 combines a variety of sensors, optionally including one or more of the following sensors: a three-axis gyroscope sensor, an acceleration sensor, an angle sensor, a vibration sensor, and a gravity sensor;

[0036] The electromagnetic control system includes an access port module and a communication module, which are used to access the sensor assembly device 108 and obtain feedback data from the sensor; a central processing unit, which is used to process sensor data analysis and issue corresponding control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device 106; a memory, which includes a preset program that can be executed by the central processing unit; and an internal database, which can store the data sent by the sensor assembly and the instructions issued by the central processing unit in the database; an output module, which is used to send control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device 106;

[0037] The electromagnetic anti-friction device comprises an electromagnetic generating device, and the electromagnetic generating device comprises an upper magnetic pole plate 102 and a lower magnetic pole plate 102; the electromagnetic generating device is configured to generate a magnetic field after being energized, and to make the upper magnetic pole plate 105 and the lower magnetic pole plate 102 have mutual attraction; an attached friction plate, wherein the upper friction plate 104 is mounted on the upper magnetic pole plate 105, and the lower friction plate 103 is mounted on the lower magnetic pole plate 102, and the upper friction plate 104 and the lower friction plate 103 are located between the upper magnetic pole plate 105 and the lower magnetic pole plate 102, and the structure is used to increase the friction between the contact surfaces and buffer the vibration in the horizontal direction; a peripheral control circuit, used to connect the intelligent adjustment system; a support structure 101, used to assist the electromagnetic anti-friction device to remain in a relatively stable preset position;

[0038] The electromagnetic anti-friction device includes a working power supply, the voltage of which is changed by the peripheral control circuit, and the peripheral control circuit adjusts the voltage of the working power supply according to the instruction, thereby adjusting the voltage applied to the electromagnetic generating device, thereby generating an adjustable magnetic force on the electromagnetic generating device;

[0039] The magnetorheological fluid vibration damping device 106 includes one or more vibration damper cylinders, each of which contains a piston, a piston connecting rod, a stroke sensor, an electromagnetic fluid 404 and an electronic control circuit;

[0040] See attached Figure 4 The main body of the magnetorheological fluid vibration damping device 106 is constructed by a shock absorber cylinder; the piston can move in a first direction along the inner wall of the shock absorber cylinder; the piston connecting rod is fixed to the vibration component assembly, and pushes and pulls the piston to move; the shock absorber cylinder is fixed to a fastening static structure; the piston divides the space in the shock absorber cylinder into a first space and a second space; the first space and the second space in the shock absorber cylinder are both filled with the electromagnetic fluid 404; a sealing ring is provided between the piston and the inner wall of the shock absorber cylinder; the piston has a micro-flow channel connecting the first space and the second space of the shock absorber cylinder, and can allow the electromagnetic fluid 404 to pass at a reasonable flow rate;

[0041] The magnetorheological fluid vibration reduction device 106 includes an electronic control circuit; the output voltage of the electronic control circuit is changed by the electromagnetic control system; the piston has a coil with multiple turns inside; the coil is connected to the electronic control circuit;

[0042] See attached Figure 5 The electromagnetic fluid 404 in the magnetorheological fluid damping device 106 contains some magnetic particles with a size of 3 to 10 microns; the electronic control circuit adjusts the voltage applied to the coil by sending a pulse signal, so that a dynamic induced magnetic field is formed around the coil, and the arrangement of the magnetic particles is further changed; the magnetic particles are arranged in an orderly manner in a second direction perpendicular to the first direction under the action of the magnetic field, further changing the damping characteristics of the electromagnetic fluid 404, thereby adjusting the effect of the electromagnetic fluid 404 flowing in the first space and the second space of the damper cylinder, and further changing the damping characteristics of the intelligent adjustment system of the electromagnetic damper;

[0043] As attached Figure 1, the vibrating body 107 is fixedly mounted on the upper magnetic pole plate 105, and it is determined that the vibrating body 107 and the upper magnetic pole plate 105 do not move relative to each other; when the vibrating body 107 is freely released from the upper magnetic pole plate 105, all the weight of the vibrating body 107 is borne by the upper magnetic pole plate 105; the gravity sensor is mounted on the upper magnetic pole plate 105, and after the vibrating body 107 is mounted on the upper magnetic pole plate 105 and completely stationary, it starts to measure the current gravity value G, and transmits the obtained data to the electromagnetic control system through the communication module; the electromagnetic control system processor will use the following formula for calculation according to the preset program:

[0044] Formula 1:

[0045] Formula 1 is used to calculate the attraction N0 between an electromagnet and a ferromagnetic material in electromagnetic theory, where S is the effective area of ​​the electromagnet's magnetic pole, μ0 is the vacuum magnetic permeability, and μ r is the relative magnetic permeability of the electromagnetic material, n is the number of coil turns, V is the voltage of the coil wire, l is the magnetic path length, in m, and R is the resistance of the coil wire; in this embodiment, the magnitude N of the magnetic field force is generated by the upper magnetic pole plate 105 and the lower magnetic pole plate 102 at the same time, so the following formula 2 is obtained:

[0046] Formula 2: From this, the friction force F between the upper friction plate 104 and the lower friction plate 103 can be calculated. u :

[0047] Formula 3: Wherein μ1 is the friction coefficient of the material used for the upper friction plate 104 and the lower friction plate 103. It can be deduced from the above that the friction force F is related to the weight G of the vibrating body 107 and is directly proportional to the square of the voltage V; therefore, the friction force between the upper friction plate 104 and the lower friction plate 103 can be controlled by changing the specified voltage output by the peripheral control circuit, as shown in the attached figure. Figure 3 ;

[0048] Furthermore, by using the acceleration sensor, the horizontal acceleration value a of the upper magnetic pole plate 105 is monitored. u And make the output voltage of the peripheral control circuit V=pa u , where p is the measurement coefficient, which can be adjusted according to the working conditions, that is, the dynamic relationship between the control voltage and the vibration intensity can be obtained; and by further optimizing the value of the measurement coefficient p, the electromagnetic anti-friction device can reduce and offset the vibration of the vibrating body 107 in the horizontal direction to a certain extent;

[0049] Furthermore, four or more magnetorheological fluid vibration reduction devices 106 are installed below the lower magnetic pole plate 102 with their central axes in a vertical direction, and in an initial state, the lower magnetic pole plate 102 is kept stationary in a horizontal state;

[0050] The electromagnetic fluid 404 filled in the magnetorheological fluid damping device 106 contains a certain proportion of magnetic particles. Under the action of an external magnetic field, the ferromagnetic particles inside the magnetic particles form a chain structure along the magnetic lines of force, thereby producing a significant shear force change on the flow of the fluid, and macroscopically exhibiting a solid-like property of increased viscosity; the electromagnetic fluid 404 can change from a low-viscosity Newtonian fluid to a high-viscosity Bingham semi-solid in a very short time (about 10ms), thereby producing a significant change in the damping coefficient; further, the electromagnetic fluid 404 reversibly restores the original flow state after the magnetic field is withdrawn, thereby exhibiting a characteristic that can be adjusted according to the external magnetic field;

[0051] Furthermore, the piston includes one or more electromagnetic coils inside, and the electromagnetic coils are connected by the electronic control circuit; the electronic control circuit provides a voltage V1 applied to the electromagnetic coil, and according to electromagnetic theory, when the number of coil turns, coil resistance and coil length are constant, the magnetic field strength B inside the electromagnetic coil is proportional to the coil current I, therefore, by changing the voltage V1 applied by the electronic control circuit, the damping coefficient of the electromagnetic fluid 404 can be changed, thereby adjusting the shock absorption effect of the electromagnetic shock absorption device;

[0052] Furthermore, the three-axis gyroscope sensor, acceleration sensor, angle sensor and vibration sensor in the sensor assembly are installed on the lower magnetic pole plate 102 to monitor the vibration of the lower magnetic pole plate 102, including the vibration frequency f, vibration acceleration a, amplitude L, and the deflection angle α of the lower magnetic pole plate 102 relative to the horizontal direction. x and α y Further, the stroke sensor is installed in the magnetorheological fluid damping device 106 to monitor the stroke change of the piston L p The sensor transmits the monitoring data to the electromagnetic control system through the communication system, and the central processor changes the voltage V1 of the electronic control circuit at a frequency of more than 1000 Hz according to the preset program to adjust the damping effect of the electromagnetic shock absorbing device to achieve the vibration reduction effect on the vertical vibration component;

[0053] Embodiment 2:

[0054] This embodiment should be understood as including at least all the features of any one of the aforementioned embodiments, and further improved on the basis thereof; an intelligent adjustment system suitable for an electromagnetic shock absorber, characterized in that the intelligent adjustment system comprises: a sensor assembly device 108, an electromagnetic control system, an electromagnetic anti-friction device and a magnetorheological fluid shock absorbing device 106; the sensor assembly is used to detect the vibration condition of the current vibrating body 107; the electromagnetic control system is used to receive and process the vibration condition sensed by the sensor assembly, make corresponding analysis, and generate an electrical signal to feed back to the electromagnetic anti-friction device and the magnetorheological fluid shock absorbing device 106; the electromagnetic anti-friction device uses a magnetic field generated by electromagnetic force to offset the horizontal displacement and vibration of the vibrating body 107; the magnetorheological fluid shock absorbing device 106 is constructed to offset and reduce the vibration of the vibrating body 107 in the vertical and horizontal directions;

[0055] The sensor assembly device 108 combines a variety of sensors, optionally including one or more of the following sensors: a three-axis gyroscope sensor, an acceleration sensor, an angle sensor, a vibration sensor, and a gravity sensor;

[0056] The electromagnetic control system includes an access port module and a communication module, which are used to access the sensor assembly device 108 and obtain feedback data from the sensor; a central processing unit, which is used to process sensor data analysis and issue corresponding control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device 106; a memory, which includes a preset program that can be executed by the central processing unit; and an internal database, which can store the data sent by the sensor assembly and the instructions issued by the central processing unit in the database; an output module, which is used to send control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device 106;

[0057] The electromagnetic anti-friction device comprises an electromagnetic generating device, the electromagnetic generating device comprises an upper magnetic pole plate 105, and a lower magnetic pole plate 102; the electromagnetic generating device is configured to generate a magnetic field after being energized, and to make the upper magnetic pole plate 105 and the lower magnetic pole plate 102 have mutual attraction; an attached friction plate, wherein the upper friction plate 104 is mounted on the upper magnetic pole plate 105, the lower friction plate 103 is mounted on the lower magnetic pole plate 102, and the upper friction plate 104 and the lower friction plate 103 are located between the upper magnetic pole plate 105 and the lower magnetic pole plate 102, and the structure is used to increase the friction between the contact surfaces and buffer the vibration in the horizontal direction; a peripheral control circuit, used to connect the intelligent adjustment system; a support structure 101, used to assist the electromagnetic anti-friction device to remain in a relatively stable preset position;

[0058] The electromagnetic anti-friction device includes a working power supply, the voltage of which is changed by the peripheral control circuit, and the peripheral control circuit adjusts the voltage of the working power supply according to the instruction, thereby adjusting the voltage applied to the electromagnetic generating device, thereby generating an adjustable magnetic force on the electromagnetic generating device;

[0059] The magnetorheological fluid vibration damping device 106 includes one or more vibration damper cylinders, each of which contains a piston, a piston connecting rod, a stroke sensor, an electromagnetic fluid 404 and an electronic control circuit;

[0060] The main body of the magnetorheological fluid vibration damping device 106 is constructed by a shock absorber cylinder; the piston can move in a first direction along the inner wall of the shock absorber cylinder; the piston connecting rod is fixed to the vibration component assembly, and pushes and pulls the piston to move; the shock absorber cylinder is fixed to a fastening static structure; the piston divides the space in the shock absorber cylinder into a first space and a second space; the first space and the second space in the shock absorber cylinder are both filled with the electromagnetic fluid 404; a sealing ring is provided between the piston and the inner wall of the shock absorber cylinder; the piston has a micro-flow channel connecting the first space and the second space of the shock absorber cylinder, and can allow the electromagnetic fluid 404 to pass at a reasonable flow rate;

[0061] Furthermore, four or more magnetorheological fluid vibration reduction devices 106 are installed below the lower magnetic pole plate 102 with their central axes in a vertical direction, and in an initial state, the lower magnetic pole plate 102 is kept stationary in a horizontal state;

[0062] The magnetorheological fluid vibration reduction device 106 includes an electronic control circuit; the output voltage of the electronic control circuit is changed by the electromagnetic control system; the piston has a coil with multiple turns inside; the coil is connected to the electronic control circuit;

[0063] The electromagnetic fluid 404 in the magnetorheological fluid vibration damping device 106 contains some magnetic particles with a size of 3 to 10 microns; the electronic control circuit adjusts the voltage applied to the coil by sending a pulse signal, so that a dynamic magnetic field is formed around the coil, and the arrangement of the magnetic particles is changed; the magnetic particles are arranged in a second direction perpendicular to the first direction, further changing the damping characteristics of the electromagnetic fluid 404, and adjusting the effect of the electromagnetic fluid 404 flowing in the first space and the second space of the shock absorber cylinder, further changing the vibration damping characteristics of the intelligent adjustment system of the electromagnetic shock absorber;

[0064] The displacement sensor and the acceleration sensor are installed on the upper magnetic pole plate 105 to monitor the horizontal displacement L of the upper magnetic pole plate 105. u and the horizontal acceleration au , and through formula 3, the output voltage V and L of the peripheral control circuit are established u 、a u Control relationship: V = p0L u +p1a u , where p0 and p1 are measurement coefficients;

[0065] Furthermore, a PID control function based on the electromagnetic anti-friction device is established in the electromagnetic control system: e(t)=r(t1)-r(t0), where r(t) is the displacement L of the upper magnetic pole plate 105 in the horizontal direction preset by the program. u and the horizontal acceleration a u The theoretical given values ​​at t0 and t1 correspond to p0 and p1, and the deviation e(t) of p0 and p1 at t0 and t1 is calculated; further, the values ​​of p0 and p1 are continuously predicted and optimized by machine learning; further, the electromagnetic control system monitors and classifies the vibration characteristics of the upper magnetic pole plate 105, such as high-frequency small-amplitude vibration, or low-frequency small-amplitude vibration, or large-amplitude vibration at long and short period intervals, and performs linear regression calculation with periodic data records, summarizes its vibration characteristics and provides data records to technicians for algorithm optimization;

[0066] Furthermore, the three-axis gyroscope sensor, acceleration sensor, angle sensor and vibration sensor in the sensor assembly are installed on the lower magnetic pole plate 102 to monitor the vibration of the lower magnetic pole plate 102, including the vibration frequency f, vibration acceleration a, amplitude L, and the deflection angle α of the lower magnetic pole plate 102 relative to the horizontal direction. x and α y Furthermore, the memory of the electromagnetic control system will record the following monitoring data in sequence into the database, including the horizontal displacement L of the upper magnetic pole plate 105 u and the horizontal acceleration a u , the vibration frequency f, vibration acceleration a, amplitude L of the lower magnetic pole plate 102, and the deflection angle α of the lower magnetic pole plate 102 relative to the horizontal direction x and α y , the output voltage V of the electromagnetic anti-friction device, the output voltage V1 of the magnetorheological fluid vibration reduction device 106;

[0067] Furthermore, the electromagnetic control system establishes a PID control function based on the magnetorheological fluid vibration reduction device 106: e'(t) = s(t1) - s(t0), where the function s(t) is a theoretical given value α x and α yWhen the output voltage value V1 of the corresponding electronic control circuit is t0, the deviation e(t) of V1 at t0 and t1 is calculated; further, the value of V1 is continuously predicted and optimized by means of machine learning; further, the electromagnetic control system monitors and classifies the vibration characteristics of the lower magnetic pole plate 102, such as high-frequency small-amplitude vibration, or low-frequency small-amplitude vibration, or large-amplitude vibration at long and short period intervals, and uses periodic data records for linear regression calculation to summarize its vibration characteristics and provide data records to technicians for algorithm optimization; the ultimate goal is to keep the overall vibration posture of the lower magnetic pole plate 102 horizontal and the amplitude as small as possible.

[0068] Embodiment three:

[0069] This embodiment should be understood as including at least all the features of any of the above embodiments and further improving upon them; an intelligent adjustment system suitable for an electromagnetic vibration absorber, characterized in that the intelligent adjustment system comprises: a sensor assembly device 108,

[0070] Electromagnetic control system, electromagnetic anti-friction device and magnetorheological fluid vibration damping device 106; the sensor assembly is used to detect the vibration condition of the current vibrating body 107; the electromagnetic control system is used to receive and process the vibration condition sensed by the sensor assembly, make corresponding analysis, and generate electrical signals to feed back to the electromagnetic anti-friction device and magnetorheological fluid vibration damping device 106; the electromagnetic anti-friction device uses the magnetic field generated by electromagnetic force to offset the horizontal displacement and vibration of the vibrating body 107; the magnetorheological fluid vibration damping device 106 is constructed to offset and reduce the vibration of the vibrating body 107 in the vertical and horizontal directions;

[0071] The sensor assembly device 108 combines a variety of sensors, optionally including one or more of the following sensors: a three-axis gyroscope sensor, an acceleration sensor, an angle sensor, a vibration sensor, and a gravity sensor;

[0072] The electromagnetic control system includes an access port module and a communication module, which are used to access the sensor assembly device 108 and obtain feedback data from the sensor; a central processing unit, which is used to process sensor data analysis and issue corresponding control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device 106; a memory, which includes a preset program that can be executed by the central processing unit; and an internal database, which can store the data sent by the sensor assembly and the instructions issued by the central processing unit in the database; an output module, which is used to send control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device 106;

[0073] The electromagnetic anti-friction device comprises an electromagnetic generating device, the electromagnetic generating device comprises an upper magnetic pole plate 105 and a lower magnetic pole plate 102; the electromagnetic generating device is configured to generate a magnetic field after being energized, and to make the upper and lower magnetic pole plates 102 have mutual attraction; an attached friction plate, wherein the upper friction plate 104 is mounted on the upper magnetic pole plate 105, the lower friction plate 103 is mounted on the lower magnetic pole plate 102, and the upper friction plate 104 and the lower friction plate 103 are located between the upper magnetic pole plate 105 and the lower magnetic pole plate 102, and the structure is used to increase the friction between the contact surfaces and buffer the vibration in the horizontal direction; a peripheral control circuit, used to connect the intelligent adjustment system; a support structure 101, used to assist the electromagnetic anti-friction device to remain in a relatively stable preset position;

[0074] The electromagnetic anti-friction device includes a working power supply, the voltage of which is changed by the peripheral control circuit, and the peripheral control circuit adjusts the voltage of the working power supply according to the instruction, thereby adjusting the voltage applied to the electromagnetic generating device, thereby generating an adjustable magnetic force on the electromagnetic generating device;

[0075] The magnetorheological fluid vibration damping device 106 includes one or more vibration damper cylinders, each of which contains a piston, a piston connecting rod, a stroke sensor, an electromagnetic fluid 404 and an electronic control circuit;

[0076] The main body of the magnetorheological fluid vibration damping device 106 is constructed by a shock absorber cylinder; the piston can move in a first direction along the inner wall of the shock absorber cylinder; the piston connecting rod is fixed to the vibration component assembly, and pushes and pulls the piston to move; the shock absorber cylinder is fixed to a fastening static structure; the piston divides the space in the shock absorber cylinder into a first space and a second space; the first space and the second space in the shock absorber cylinder are both filled with the electromagnetic fluid 404; a sealing ring is provided between the piston and the inner wall of the shock absorber cylinder; the piston has a micro-flow channel connecting the first space and the second space of the shock absorber cylinder, and can allow the electromagnetic fluid 404 to pass at a reasonable flow rate;

[0077] Furthermore, if Figure 2 , four or more magnetorheological fluid vibration damping devices 106 are installed below the upper magnetic pole plate 105 in a manner that their central axes have a certain angle with the vertical; and in the initial state, the upper magnetic pole plate 105 is kept stationary in a horizontal state; further, the central axes of the four or more magnetorheological fluid vibration damping devices 106 are equal to the angles between the plane where the upper magnetic pole plate 105 is located; further, the second end of the piston connecting rod is at a higher height than the third end of the shock absorber cylinder; further, the second end of the piston connecting rod is closer to the upper magnetic pole plate 105 than the third end of the shock absorber cylinder;

[0078] The magnetorheological fluid vibration reduction device 106 includes an electronic control circuit; the output voltage of the electronic control circuit is changed by the electromagnetic control system; the piston has a coil with multiple turns inside; the coil is connected to the electronic control circuit;

[0079] The electromagnetic fluid 404 in the magnetorheological fluid vibration damping device 106 contains some magnetic particles with a size of 3 to 10 microns; the electronic control circuit adjusts the voltage applied to the coil by sending a pulse signal, so that a dynamic magnetic field is formed around the coil, and the arrangement of the magnetic particles is changed; the magnetic particles are arranged in a second direction perpendicular to the first direction, further changing the damping characteristics of the electromagnetic fluid 404, and adjusting the effect of the electromagnetic fluid 404 flowing in the first space and the second space of the shock absorber cylinder, further changing the vibration damping characteristics of the intelligent adjustment system of the electromagnetic shock absorber;

[0080] By using the acceleration sensor, the horizontal acceleration value a of the upper magnetic pole plate 105 is monitored. u And make the output voltage of the peripheral control circuit V=pa u , where p is the measurement coefficient, which can be adjusted according to the working conditions, that is, the dynamic relationship between the control voltage and the vibration intensity can be obtained; and by further optimizing the value of the measurement coefficient p, the electromagnetic anti-friction device can reduce and offset the vibration of the vibrating body 107 in the horizontal direction to a certain extent; further, the displacement sensor and the acceleration sensor are installed on the upper magnetic pole plate 105 to monitor the displacement L of the upper magnetic pole plate 105 in the horizontal direction u and the horizontal acceleration a u ;

[0081] Furthermore, the three-axis gyroscope sensor, acceleration sensor, angle sensor, vibration sensor and displacement sensor in the sensor assembly are installed on the upper magnetic pole plate 105 to monitor the vibration of the upper magnetic pole plate 105, including the vibration frequency f, the deflection angle α of the upper magnetic pole plate 105 relative to the horizontal direction x and α y Further, the stroke sensor is installed in the magnetorheological fluid damping device 106 to monitor the stroke change of the piston L p The sensor transmits the monitoring data to the electromagnetic control system through the communication system, and the central processor changes the voltage V1 of the electronic control circuit at a frequency of more than 1000 Hz according to the preset program to adjust the damping effect of the electromagnetic shock absorbing device to achieve the vibration reduction effect on the vertical vibration component;

[0082] According to the vibration displacement L of the upper magnetic pole plate 105 measured by the above multiple sets of sensors u , acceleration au , the deflection angle α relative to the horizontal direction x and α y , vibration frequency f, and at the same time, the magnetic force of the electromagnetic anti-friction device and the damping force of the magnetorheological fluid vibration reduction device 106 act on the vibrations in the vertical and horizontal directions at the same time; the electromagnetic control system can use big data analysis, combined with machine learning methods, and adopt a high-frequency sampling method to repeatedly study and track the output of the system control voltage and the actual vibration reduction conditions in the unit time intervals t0 and t1, and finally obtain a set of optimized control parameters.

Claims

1. An intelligent adjustment system for electromagnetic vibration absorbers, characterized in that: It comprises a sensor assembly device (108), an electromagnetic control system, an electromagnetic anti-friction device and a magnetorheological fluid vibration reduction device (106); the electromagnetic control system comprises an internal database and a communication module; The sensor assembly device (108) is used to detect the current vibration condition of the vibrating body (107); the electromagnetic control system is used to receive and process the vibration condition sensed by the sensor assembly device (108), make corresponding analysis, and generate electrical signals to feed back to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device (106); the electromagnetic anti-friction device uses a magnetic field generated by electromagnetic force to offset the horizontal displacement and vibration of the vibrating body (107); the magnetorheological fluid vibration reduction device (106) is constructed to offset and reduce the vibration of the vibrating body (107) in the vertical and horizontal directions; The electromagnetic anti-friction device comprises an electromagnetic generating device, and the electromagnetic generating device comprises an upper magnetic pole plate and a lower magnetic pole plate; the electromagnetic generating device is configured to generate a magnetic field after being energized, and to make the upper magnetic pole plate and the lower magnetic pole plate have mutual attraction; an attached friction plate, wherein the upper friction plate is mounted on the upper magnetic pole plate, the lower friction plate is mounted on the lower magnetic pole plate, and the upper friction plate and the lower friction plate are located between the upper magnetic pole plate and the lower magnetic pole plate, and the structure is used to increase the friction between the contact surfaces and buffer the vibration in the horizontal direction; a peripheral control circuit is used to connect the intelligent adjustment system; a support structure is used to assist the electromagnetic anti-friction device to remain in a relatively stable preset position; the lower magnetic pole plate is placed on the support structure; The electromagnetic anti-friction device includes a working power supply, the voltage of which is changed by the peripheral control circuit, and the peripheral control circuit adjusts the voltage of the working power supply according to the instruction, thereby adjusting the voltage applied to the electromagnetic generating device, thereby generating an adjustable magnetic force on the electromagnetic generating device; The magnetorheological fluid vibration damping device includes one or more vibration damper cylinders, each of which contains a piston, a piston connecting rod, a stroke sensor, an electromagnetic fluid and an electronic control circuit; The main body of the magnetorheological fluid vibration damping device is constructed by a vibration damper cylinder; the piston can move in a first direction along the inner wall of the vibration damper cylinder; the piston divides the space in the vibration damper cylinder into a first space and a second space; the first space and the second space of the vibration damper cylinder are both filled with the electromagnetic fluid; a sealing ring is provided between the piston and the inner wall of the vibration damper cylinder; the piston has a micro-flow channel connecting the first space and the second space of the vibration damper cylinder, and can allow the electromagnetic fluid to pass through at a reasonable flow rate; The magnetorheological fluid vibration reduction device includes an electronic control circuit; the output voltage of the electronic control circuit is changed by the electromagnetic control system; the piston has a coil with multiple turns inside; the coil is connected to the electronic control circuit; The electromagnetic fluid in the magnetorheological fluid damping device contains some magnetic particles with a size of 3 to 10 microns; the electronic control circuit adjusts the voltage applied to the coil by sending a pulse signal, so that a dynamic induced magnetic field is formed around the coil, thereby changing the arrangement of the magnetic particles; under the action of the magnetic field, the magnetic particles are arranged in an orderly manner in a second direction perpendicular to the first direction, thereby changing the damping characteristics of the electromagnetic fluid; The sensor assembly device (108) combines a variety of sensors, including one or more of the following sensors: a three-axis gyroscope sensor, an acceleration sensor, an angle sensor, a displacement sensor, a vibration sensor, and a gravity sensor; The vibrator is fixedly mounted on the upper magnetic pole plate, and it is ensured that the vibrator and the upper magnetic pole plate do not move relative to each other; when the vibrator is freely released from the upper magnetic pole plate, all the weight of the vibrator is borne by the upper magnetic pole plate; the gravity sensor is mounted on the upper magnetic pole plate, and after the vibrator is mounted on the upper magnetic pole plate and completely stationary, it starts to measure the current gravity value G, and transmits the obtained data to the electromagnetic control system through the communication module; the electromagnetic control system processor will use the following formula for calculation according to the preset program: Formula 1: Formula 1 is used to calculate the attraction N0 between an electromagnet and a ferromagnetic material in electromagnetic theory, where S is the effective area of ​​the electromagnet's magnetic pole, μ0 is the vacuum magnetic permeability, and μ r is the relative magnetic permeability of the electromagnetic material, n is the number of coil turns, V is the voltage of the coil wire, l is the length of the magnetic path, in meters, and R is the resistance of the coil wire; The magnitude of the magnetic field force N is generated by the simultaneous action of the upper magnetic pole plate and the lower magnetic pole plate, so the following formula 2 is obtained: Formula 2: The friction force F between the upper friction plate and the lower friction plate is calculated from this u : Formula 3: Where μ1 is the friction coefficient of the material used for the upper friction plate and the lower friction plate; Four or more magnetorheological fluid vibration reduction devices are installed with their central axes tilted below the upper magnetic pole plate, and in the initial state, the upper magnetic pole plate is kept stationary in a horizontal state; the other end of the magnetorheological fluid vibration reduction device is installed on the supporting structure; The displacement sensor and the acceleration sensor are installed on the upper magnetic pole plate to monitor the horizontal displacement L of the upper magnetic pole plate. u and the horizontal acceleration a u , and through formula 3, the output voltage V and L of the peripheral control circuit are established u 、a u Control relationship: V = p0L u +p1a u , where p0 and p1 are measurement coefficients; The three-axis gyroscope sensor, acceleration sensor, angle sensor and vibration sensor in the sensor assembly are installed on the upper magnetic pole plate to monitor the vibration of the upper magnetic pole plate, including the vibration frequency f, vibration acceleration a, amplitude L, and the deflection angle α of the upper magnetic pole plate relative to the horizontal direction. x and α y ; The stroke sensor is installed in the magnetorheological fluid damping device to monitor the stroke change Lp of the piston; the memory of the electromagnetic control system will record the following monitoring data in sequence into the internal database, including the horizontal displacement Lp of the upper magnetic pole plate u and the horizontal acceleration a u , the vibration frequency f, vibration acceleration a, amplitude L of the upper magnetic pole plate, and the deflection angle α of the upper magnetic pole plate relative to the horizontal direction x and α y , the output voltage V of the electromagnetic anti-friction device, the output voltage V1 of the magnetorheological fluid vibration reduction device; The electromagnetic control system is established based on the PID control function for the magnetorheological fluid vibration damping device: , where the function s(t) is the theoretical given value α x and α y When the corresponding electronic control circuit output voltage value V1, calculate the deviation of V1 at t0 and t1 ; Through machine learning, the value of V1 is continuously predicted and optimized; the electromagnetic control system uses big data analysis, combined with machine learning methods, and adopts high-frequency sampling to repeatedly study and track the output of the system control voltage and the actual vibration reduction conditions in the unit time intervals t0 and t1 to optimize the control parameters.

2. The intelligent adjustment system for electromagnetic vibration absorber according to claim 1, characterized in that: The electromagnetic control system comprises an access port module, wherein the access port module and the communication module are used to access the sensor assembly device (108) and obtain feedback data from the sensor; a central processing unit is used to process the data analysis of the sensor and issue corresponding control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device (106); and a memory including a preset program executed by the central processing unit; and an internal database, storing the data sent by the sensor assembly and the instructions issued by the central processing unit in the internal database; The output module is used to send control instructions to the electromagnetic anti-friction device and the magnetorheological fluid vibration reduction device (106).

Images