An axial eddy current damping actuator based on inverse piezoelectric effect

Abstract

The application belongs to the field of structural vibration control, and particularly relates to an axial electro-vortex damping actuator based on inverse piezoelectric effect. The technology comprises an outer sleeve, a left cavity spring, a first piezoelectric damping mechanism, an inner sleeve, a shaft and a second piezoelectric damping mechanism. The outer sleeve is axially provided with a first installation cavity. The left side of the inner sleeve extends into the first installation cavity. The inner sleeve is axially provided with a second installation cavity. An electro-vortex damping mechanism is arranged in the second installation cavity. A shaft is independently arranged in the center of the electro-vortex damping mechanism. The left end of the shaft extends out of the inner sleeve and is fixedly connected with the left end surface of the first installation cavity. The part of the shaft located in the first installation cavity is provided with the first piezoelectric damping mechanism. The right end of the second installation cavity is provided with the second piezoelectric damping mechanism. The electro-vortex damper and the piezoelectric stack actuator are combined, thereby reducing friction and vibration, improving durability, and improving accuracy and stability.

Description

Technical Field

[0001] This invention belongs to the field of structural vibration control, and in particular relates to an axial eddy current damping actuator based on the inverse piezoelectric effect. Background Technology

[0002] As a control device that combines the advantages of both dampers and actuators, the damping actuator can achieve precise adjustment of the control device, reduce energy consumption, and is simple, easy to operate, and technologically mature. It has been widely recognized and applied in the engineering field.

[0003] With the continuous development of technology and processes, fields such as road transportation, aerospace, and automobile manufacturing are no longer satisfied with traditional damping actuators and have greatly increased their requirements, necessitating the optimization and innovation of damping actuators.

[0004] Chinese patent CN205423677U discloses a vibration isolator that can reduce vibration over a wide frequency range, comprising an actuator, a damper, a coil, and an iron core. An intermediate mass is connected to both the actuator and the damper, reducing vibration and its transmission. However, this patent also utilizes multiple other components besides the aforementioned elements, such as a mass block, a housing, an output rod, and rubber components, resulting in a complex structure, large mass volume, and significant space requirements. In specific embodiments, the rubber components and mass block require vulcanization, which poses health risks. The vulcanization process releases a large amount of heat, affecting the vibration isolator itself, impacting accuracy, and potentially increasing errors.

[0005] In summary, traditional damping actuators mostly employ mechanical structures, with components that are large, heavy, and difficult to move. Limitations in their mechanical construction and design significantly impact their sensitivity. Furthermore, the use of oil as the working medium is prone to leakage during long-term use, leading to negative consequences. Summary of the Invention

[0006] The purpose of this invention is to provide an axial eddy current damping actuator based on the inverse piezoelectric effect, which can solve the technical problems of traditional damping actuators, such as large weight, low sensitivity, and easy oil leakage.

[0007] The axial eddy current damping actuator based on the inverse piezoelectric effect of the present invention includes an outer cylinder sleeve, a left cavity spring, a first piezoelectric damping mechanism, an inner cylinder sleeve, a shaft, and a second piezoelectric damping mechanism. The outer cylinder sleeve has an axially formed first mounting cavity, and the left side portion of the inner cylinder sleeve extends into this first mounting cavity. The inner cylinder sleeve has an axially formed second mounting cavity, within which the eddy current damping mechanism is disposed. A shaft is independently mounted through the center of the eddy current damping mechanism. The left end of the shaft extends out of the inner cylinder sleeve and is fixedly connected to the left end face of the first mounting cavity. The portion of the shaft located in the first mounting cavity is fitted with the first piezoelectric damping mechanism. A second piezoelectric damping mechanism is disposed at the right end of the second mounting cavity, with the right end of the shaft closely abutting the left end of the second piezoelectric damping mechanism. Both the first and second piezoelectric damping mechanisms are electrically connected to an external power source to utilize the inverse piezoelectric effect for vibration suppression. The left end of the outer cylinder sleeve and the right end of the inner cylinder sleeve are used to connect to the structure to be damped.

[0008] Furthermore, the eddy current damping mechanism includes a conductor, multiple permanent magnets, and multiple magnetic rings. The conductor is fixed in the second mounting cavity, the multiple permanent magnets are fixed in the central hole opened axially in the conductor, a magnetic ring is provided between two adjacent permanent magnets, and the shaft passes through the center of the permanent magnets and the magnetic rings.

[0009] Furthermore, the two ends of the conductor extend to the left and right ends of the second mounting cavity.

[0010] Furthermore, the first piezoelectric vibration damping mechanism includes a left cavity spring and a left piezoelectric stack. Both the left cavity spring and the left piezoelectric stack are sleeved on the shaft, and the left piezoelectric stack is located between the shaft and the left cavity spring. The left and right ends of the left cavity spring are fixedly connected to the left side wall of the first mounting cavity and the left end of the inner cylinder sleeve, respectively. The left end of the left piezoelectric stack is fixedly connected to the left end of the first mounting cavity. The left piezoelectric stack is electrically connected to the external power source.

[0011] Furthermore, the left piezoelectric stack is composed of multiple ring-shaped piezoelectric elements stacked together.

[0012] Furthermore, the second piezoelectric vibration damping mechanism includes a right cavity spring and a right piezoelectric stack disposed within the right cavity spring. The left end of the right cavity spring is fixedly connected to the right end of the shaft. The right end of the right cavity spring and the right end of the right piezoelectric stack are both fixedly connected to the right side wall of the second mounting cavity. The left end of the right piezoelectric stack is in close contact with the right end of the shaft. The right piezoelectric stack is electrically connected to the external power source.

[0013] Furthermore, the right piezoelectric stack is composed of multiple cylindrical piezoelectric elements stacked together.

[0014] Furthermore, a limiting head with a size larger than the outer diameter of the right cavity spring is formed at the right end of the shaft. The right end face of the limiting head is fixedly connected to the left end of the right cavity spring and abuts against the left end of the right piezoelectric stack.

[0015] Furthermore, a linear bearing is provided between the left end of the inner cylinder liner and the shaft, and a guide bearing is provided between the conductor and the shaft.

[0016] Furthermore, a left connector is provided on the left side of the outer cylinder liner, and the right end of the left connector is fixedly connected to the left end of the shaft. A right connector is formed on the right end of the inner cylinder liner.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. A frictionless, non-contact eddy current damping system achieves sustained motion stability. Furthermore, the distribution and composition of the overall structure further reduce friction and vibration, decrease wear on mechanical parts, and improve the durability of the eddy current damping actuator.

[0019] 2. By combining the eddy current damper and the piezoelectric stack actuator, this invention combines the advantages of both. When the damper damping is too small, the piezoelectric stack actuator can provide force, further improving the vibration control effect, significantly improving accuracy and stability, reducing energy consumption, and improving practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram illustrating the principle of the inverse piezoelectric effect;

[0022] Figure 3 This is the control principle diagram of the present invention.

[0023] The components in the diagram are named as follows: 1. Left connector; 2. Outer cylinder liner; 2.1. First mounting cavity; 3. Left cavity spring; 4. Left piezoelectric stack; 5. Linear bearing; 6. Inner cylinder liner; 6.1. Second mounting cavity; 7. Conductor; 8. Permanent magnet; 9. Magnetic ring; 10. Shaft; 10.1. Limiting head; 11. Guide bearing; 12. Right cavity spring; 13. Right piezoelectric stack; 14. Right connector. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0025] like Figure 1As shown, this embodiment proposes an axial eddy current damping actuator based on the inverse piezoelectric effect, including an outer cylinder sleeve 2, a left cavity spring 3, a first piezoelectric damping mechanism, an inner cylinder sleeve 6, a shaft 10, and a second piezoelectric damping mechanism. The outer cylinder sleeve 2 has an axially formed first mounting cavity 2.1, and the left side portion of the inner cylinder sleeve 6 extends into this first mounting cavity 2.1. The inner cylinder sleeve 6 has an axially arranged second mounting cavity 6.1, within which an eddy current damping mechanism is disposed. An eddy current damping mechanism is independently inserted through the center of this eddy current damping mechanism. A shaft 10 is installed, with its left end extending out of the inner cylinder sleeve 6 and fixedly connected to the left end face of the first mounting cavity 2.1. The portion of the shaft 10 located in the first mounting cavity 2.1 is fitted with a first piezoelectric vibration damping mechanism, and a second piezoelectric vibration damping mechanism is provided at the right end of the second mounting cavity 6.1. The right end of the shaft 10 is in close contact with the left end of the second piezoelectric vibration damping mechanism. The first and second piezoelectric vibration damping mechanisms are used to achieve vibration suppression using the inverse piezoelectric effect. The left end of the outer cylinder sleeve 2 and the right end of the inner cylinder sleeve 6 are used to connect the structure to be damped.

[0026] In the aforementioned axial eddy current damping actuator, the eddy current damping mechanism generates induced eddy currents when the shaft 10 and the inner cylinder liner 6 cut magnetic field lines during relative motion. These induced eddy currents generate a magnetic field opposite to the original magnetic field, thus producing a damping force that opposes changes in magnetic flux. This converts the kinetic energy of the structure to be damped into its own heat energy for dissipation, thereby achieving energy dissipation and vibration reduction. During this process, the first and second piezoelectric damping mechanisms are subjected to compression. However, due to the application of an electric field in the polarization direction of the dielectric materials in the first and second piezoelectric damping mechanisms via an external power source, according to the piezoelectric inverse effect, these dielectric materials generate mechanical deformation or mechanical pressure in a certain direction, forming a force opposite to the compression force, thereby achieving the purpose of vibration suppression. Therefore, the axial eddy current damping actuator described in this example achieves sustained motion stability through a frictionless, non-contact eddy current damping system. Furthermore, the distribution and configuration of the overall structure further reduce friction and vibration, minimizing wear on mechanical parts and improving the durability of the eddy current damping actuator. Simultaneously, the combination of the eddy current damper and the piezoelectric stack actuator allows the invention to possess the advantages of both. When the damper's damping is too low, the piezoelectric stack actuator can provide force, further improving vibration control, significantly enhancing accuracy and stability, reducing energy consumption, and increasing practicality.

[0027] Preferably, a left connecting body 1 is provided on the left side of the outer cylinder liner 2, and the right end of the left connecting body 1 is fixedly connected to the left end of the shaft 10. A right connecting body 14 is formed on the right end of the inner cylinder liner 6. The axial eddy current voltage damping actuator is connected to the vibration damping mechanism through the left connecting body 1 and the right connecting body 14. Optionally, the position, quantity, and structural form of the left connecting body 1 and the right connecting body 14 can be adaptively selected according to the specific operating environment of the axial eddy current voltage damping energy harvester.

[0028] like Figure 1 As shown, the first piezoelectric vibration damping mechanism includes a left cavity spring 3 and a left piezoelectric stack 4. Both the left cavity spring 3 and the left piezoelectric stack 4 are sleeved on the shaft 10, and the left piezoelectric stack 4 is located between the shaft 10 and the left cavity spring 3. The left and right ends of the left cavity spring 3 are fixedly connected to the left side wall of the first mounting cavity 2.1 and the left end of the inner cylinder liner 6, respectively. The left end of the left piezoelectric stack 4 is fixedly connected to the left end of the first mounting cavity 2.1. The left piezoelectric stack 4 is electrically connected to the external power source.

[0029] When the shaft 10 and the inner cylinder liner 6 generate relative motion to cut magnetic field lines, if the outer cylinder liner 2 and the inner cylinder liner 6 move towards each other and compress the left piezoelectric stack 4, then an electric field is applied to the left piezoelectric stack 4 by energizing an external power source. Based on the inverse piezoelectric effect (see Appendix...),... Figure 2 The left piezoelectric stack 4 will generate mechanical deformation or mechanical pressure to form a force opposite to the compressive force, and transmit the force to the structure to be damped through the outer cylinder sleeve 2, inner cylinder sleeve 6, and shaft 10, thereby achieving the purpose of vibration suppression. At the same time, the left cavity spring 3 will deform under compression to provide elastic force, which can also achieve the purpose of vibration suppression. If the outer cylinder sleeve 2 and inner cylinder sleeve 6 move in opposite directions, no electric field is applied to the left piezoelectric stack 4. At this time, the left cavity spring 3 will deform under the tension of the outer cylinder sleeve 2 and inner cylinder sleeve 6, and its elastic restoring force will be used to provide a force in the opposite direction, and transmit the force to the structure to be damped through the outer cylinder sleeve 2, inner cylinder sleeve 6, and shaft 10 to achieve the purpose of vibration suppression. In addition, the setting of the left cavity spring 3 can also help reduce the pressure on the left piezoelectric stack 4 and avoid damage to the left piezoelectric stack 4.

[0030] Preferably, the left piezoelectric stack 4 is composed of multiple stacked annular piezoelectric elements. The multiple stacked annular piezoelectric elements will be able to generate more mechanical deformation or mechanical pressure when an electric field is applied, thereby providing a greater reverse force to better achieve vibration suppression.

[0031] from Figure 1It can also be seen that the eddy current damping mechanism includes a conductor 7, a plurality of permanent magnets 8, and a plurality of magnetic rings 9. The conductor 7 is fixed in the second mounting cavity 6.1, and both ends of the conductor 7 extend to the left and right ends of the second mounting cavity 6.1. The plurality of permanent magnets 8 are fixed in the central hole opened axially in the conductor 7. A magnetic ring 9 is provided between two adjacent permanent magnets 8. The shaft 10 is inserted through the center of the permanent magnets 8 and the magnetic rings 9.

[0032] The eddy current damping mechanism designed above uses a permanent magnet 8 to form a magnetic field with a large axial range, thereby increasing the eddy current damping force generated when the shaft 10 moves. A magnetic guide ring 9 guides the magnetic field formed by the permanent magnet 8, enhancing its strength. When the shaft 10 and the inner cylinder liner 6 move relative to each other, cutting magnetic field lines, induced eddy currents are generated in the conductor 7. These induced eddy currents generate a magnetic field opposite to the original magnetic field, thus producing a damping force that opposes changes in magnetic flux. This converts the kinetic energy of the structure to be damped into its own heat energy for dissipation, thereby achieving energy dissipation and vibration reduction. In implementation, the magnetic guide ring 9 is made of a magnetically conductive material, which can be silicon steel sheet, ferrite, or a non-magnetically conductive material.

[0033] In practical applications, the damping magnitude can be adjusted by changing the number and size of the permanent magnets 8, the gap between the permanent magnets 8 and the conductor 7, and the axial length of the magnetic ring 9.

[0034] See appendix Figure 1 The second piezoelectric vibration damping mechanism includes a right cavity spring 12 and a right piezoelectric stack 13 disposed within the right cavity spring 12. The left end of the right cavity spring 12 is fixedly connected to the right end of the shaft 10. The right end of the right cavity spring 12 and the right end of the right piezoelectric stack 13 are both fixedly connected to the right side wall of the second mounting cavity 6.1. The left end of the right piezoelectric stack 13 is in close contact with the right end of the shaft 10. The right piezoelectric stack 13 is electrically connected to the external power supply.

[0035] When the shaft 10 and the inner cylinder liner 6 move relative to each other and cut magnetic field lines, if the shaft 10 and the inner cylinder liner 6 move towards each other and compress the right piezoelectric stack 13, then an electric field is applied to the right piezoelectric stack 13 by energizing an external power source. Based on the inverse piezoelectric effect (see Appendix...),... Figure 2The right piezoelectric stack 13 will generate mechanical deformation or mechanical pressure to form a force opposite to the compressive force, and transmit the force to the structure to be damped through the outer cylinder liner 2, inner cylinder liner 6, and shaft 10, thereby achieving the purpose of vibration suppression. Simultaneously, the right cavity spring 12, deformed by compression, will provide elastic force, which can also assist in achieving the purpose of vibration suppression. If the shaft 10 and inner cylinder liner 6 move in opposite directions, no electric field is applied to the right piezoelectric stack 13. In this case, the right cavity spring 12 deforms under the tension of the outer cylinder liner 2 and inner cylinder liner 6, and its elastic restoring force will be used to provide a force in the opposite direction, which will be transmitted to the structure to be damped through the outer cylinder liner 2, inner cylinder liner 6, and shaft 10, thereby achieving the purpose of vibration suppression. Furthermore, the right cavity spring 12 can also help reduce the pressure on the right piezoelectric stack 13, preventing damage to the right piezoelectric stack 13.

[0036] Preferably, the right piezoelectric stack 13 is composed of multiple stacked cylindrical piezoelectric elements. The multiple stacked cylindrical piezoelectric elements will be able to generate more mechanical deformation or mechanical pressure when an electric field is applied, thereby providing a greater reverse force to better achieve vibration suppression.

[0037] from Figure 1 It can also be seen that a limiting head 10.1 with a size larger than the outer diameter of the right cavity spring 12 is formed at the right end of the shaft 10. The right end face of the limiting head 10.1 is fixedly connected to the left end of the right cavity spring 12 and abuts against the left end of the right piezoelectric stack 13. The setting of the limiting head 10.1 can increase the end face area of ​​the shaft 10, thereby facilitating the fixing of the right cavity spring 12.

[0038] In this example, a linear bearing 5 is provided between the left end of the inner cylinder liner 6 and the shaft 10, and a guide bearing 11 is provided between the conductor 7 and the shaft 10. The linear bearing 5 and the guide bearing 11 are used to guide the movement of the shaft 10 and can transform the surface-to-surface contact between the shaft 10 and other components into point-to-surface contact, greatly reducing friction.

[0039] Finally, to facilitate the control of the timing of applying the electric field to the left piezoelectric stack 4 and the right piezoelectric stack 13 described in this example, a pressure sensor 15 is fixed at the right end of the left piezoelectric stack 4 and the left end of the right piezoelectric stack 13, as detailed in the appendix. Figure 3 The sensing end of the left pressure sensor 15 contacts the left end of the inner cylinder liner 6, and the sensing end of the right pressure sensor 15 contacts the right end of the shaft 10, thereby detecting the pressure changes between the left piezoelectric stack 4 and the inner cylinder liner 6, and between the shaft 10 and the right piezoelectric stack 13. When pressure is detected, it indicates that the shaft 10 and the inner cylinder liner 6 are in relative motion and are compressing the left piezoelectric stack 4 and the right piezoelectric stack 13. At this time, an external power supply is applied to the left piezoelectric stack 4 and the right piezoelectric stack 13, and according to the inverse piezoelectric effect (see Appendix), Figure 2The left piezoelectric stack 4 and the right piezoelectric stack 13 will generate mechanical deformation or mechanical pressure to form a force opposite to the extrusion force, and transmit the force to the structure to be damped through the outer cylinder liner 2, the inner cylinder liner 6 and the shaft 10, thereby achieving the purpose of vibration suppression.

[0040] In summary, the circumferential eddy current damping actuator described in this embodiment of the invention combines the functions of an eddy current damper and an energy trap. When the shaft 10 and the inner cylinder liner 6 move relative to each other and cut magnetic field lines, induced eddy currents are generated in the conductor 7. These induced eddy currents generate a magnetic field opposite to the original magnetic field direction, thereby generating a damping force that opposes the change in magnetic flux. This converts the kinetic energy of the structure to be damped into its own heat energy for dissipation, thus achieving the effect of energy dissipation and vibration reduction. Simultaneously, an electric field is applied to the polarization direction of the dielectric materials of the left piezoelectric stack 4 in the first piezoelectric vibration damping mechanism and the right piezoelectric stack 13 in the second piezoelectric vibration damping mechanism by an external power source. According to the inverse piezoelectric effect, these dielectric materials generate mechanical deformation or mechanical pressure, forming a force opposite to the compressive force. This force is transmitted to the structure to be damped through the outer cylinder liner 2, the inner cylinder liner 6, and the shaft 10, thereby achieving the purpose of vibration suppression. Therefore, this invention achieves sustained motion stability through a frictionless, non-contact eddy current damping system. Furthermore, the distribution and configuration of the overall structure further reduce friction and vibration, minimizing wear on mechanical parts and improving the durability of the eddy current damping actuator. Moreover, the combination of the eddy current damper and the piezoelectric stack actuator allows the piezoelectric stack actuator to provide force when the damping of the eddy current damper is too low, further enhancing vibration control, significantly improving accuracy and stability, reducing energy consumption, and increasing practicality.

[0041] The technical solution provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. An axial eddy current damping actuator based on the inverse piezoelectric effect, characterized in that: The device includes an outer cylinder liner (2), a left cavity spring (3), a first piezoelectric damping mechanism, an inner cylinder liner (6), a shaft (10), and a second piezoelectric damping mechanism. The outer cylinder liner (2) has an axially formed first mounting cavity (2.1). The left side portion of the inner cylinder liner (6) extends into the first mounting cavity (2.1). The inner cylinder liner (6) has an axially formed second mounting cavity (6.1). An eddy current damping mechanism is installed in the second mounting cavity (6.1). A shaft (10) is independently mounted through the center of the eddy current damping mechanism. The left end of the shaft (10)... The inner cylinder sleeve (6) extends out and is fixedly connected to the left end face of the first mounting cavity (2.1). The part of the shaft (10) located in the first mounting cavity (2.1) is covered with a first piezoelectric vibration damping mechanism. A second piezoelectric vibration damping mechanism is provided at the right end of the second mounting cavity (6.1). The right end of the shaft (10) is in close contact with the left end of the second piezoelectric vibration damping mechanism. Both the first and second piezoelectric vibration damping mechanisms are electrically connected to an external power source to achieve vibration suppression using the inverse piezoelectric effect. The left end of the outer cylinder sleeve (2) and the right end of the inner cylinder sleeve (6) are used to connect the structure to be damped. The first piezoelectric vibration damping mechanism includes a left cavity spring (3) and a left piezoelectric stack (4). The left cavity spring (3) and the left piezoelectric stack (4) are both sleeved on the shaft (10), and the left piezoelectric stack (4) is located between the shaft (10) and the left cavity spring (3). The left and right ends of the left cavity spring (3) are fixedly connected to the left side wall of the first mounting cavity (2.1) and the left end of the inner cylinder sleeve (6), respectively. The left end of the left piezoelectric stack (4) is fixedly connected to the left end of the first mounting cavity (2.1). The left piezoelectric stack (4) is electrically connected to the external power supply. The second piezoelectric vibration damping mechanism includes a right cavity spring (12) and a right piezoelectric stack (13) disposed in the right cavity spring (12). The left end of the right cavity spring (12) is fixedly connected to the right end of the shaft (10). The right end of the right cavity spring (12) and the right end of the right piezoelectric stack (13) are both fixedly connected to the right side wall of the second mounting cavity (6.1). The left end of the right piezoelectric stack (13) is in close contact with the right end of the shaft (10). The right piezoelectric stack (13) is electrically connected to the external power supply.

2. The axial eddy current damping actuator based on the inverse piezoelectric effect according to claim 1, characterized in that: The eddy current damping mechanism includes a conductor (7), a plurality of permanent magnets (8), and a plurality of magnetic rings (9). The conductor (7) is fixed in the second mounting cavity (6.1), and the plurality of permanent magnets (8) are fixed in the central hole opened axially in the conductor (7). A magnetic ring (9) is provided between two adjacent permanent magnets (8), and the shaft (10) is inserted through the center of the permanent magnets (8) and the magnetic rings (9).

3. The axial eddy current damping actuator based on the inverse piezoelectric effect according to claim 2, characterized in that: The two ends of the conductor (7) extend to the left and right ends of the second mounting cavity (6.1).

4. The axial eddy current damping actuator based on the inverse piezoelectric effect according to claim 1, characterized in that: The left piezoelectric stack (4) is composed of multiple ring-shaped piezoelectric elements stacked together.

5. The axial eddy current damping actuator based on the inverse piezoelectric effect according to claim 1, characterized in that: The right piezoelectric stack (13) is composed of multiple cylindrical piezoelectric elements stacked together.

6. The axial eddy current damping actuator based on the inverse piezoelectric effect according to claim 1, characterized in that: A limiting head with a size larger than the outer diameter of the right cavity spring (12) is formed at the right end of the shaft (10). The right end face of the limiting head is fixedly connected to the left end of the right cavity spring (12) and abuts against the left end of the right piezoelectric stack (13).

7. The axial eddy current damping actuator based on the inverse piezoelectric effect according to claim 2, characterized in that: A linear bearing (5) is provided between the left end of the inner cylinder liner (6) and the shaft (10), and a guide bearing (11) is provided between the conductor (7) and the shaft (10).

8. The axial eddy current damping actuator based on the inverse piezoelectric effect according to any one of claims 1-7, characterized in that: A left connector (1) is provided on the left side of the outer cylinder liner (2), and the right end of the left connector (1) is fixedly connected to the left end of the shaft (10). A right connector (14) is formed on the right end of the inner cylinder liner (6).

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