A passive-active hybrid piezoelectric vibration isolation support based on a layered periodic structure

Abstract

The application relates to a passive and active hybrid piezoelectric vibration isolation support based on a layered periodic structure, which comprises a support body and a control system connected with the support body, the support body comprises a piezoelectric actuator and a damping buffer, the piezoelectric actuator and the damping buffer are connected by being nested with sleeves to form an integral whole, the damping buffer is composed of a plurality of layered and periodically arranged damping buffer bodies, and the damping buffer is a layered periodic structure. The support first transmits the vibration to the rubber damping body of the layered periodic structure through the base of the lower layer, most of the frequency bands are blocked by using the vibration wave band gap characteristics of the hollow periodic arrangement, and the piezoelectric actuator is used to actively offset the residual vibration, so that the passive and active hybrid vibration isolation of the object to be isolated is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-frequency vibration control, and also relates to a passive-active hybrid piezoelectric vibration isolation support based on a layered periodic structure. BACKGROUND

[0002] In the field of vibration control, isolation technology is widely concerned, researched and commonly used. With the increasing development of productivity, the requirements for equipment are getting higher and higher in actual engineering operations. For some precision instruments, when coping with high dynamic operating environments, they will inevitably be disturbed by the outside world. When these disturbances are transmitted to the precision instruments, the use of the precision instruments will be affected, and even the whole equipment will be negatively affected. Therefore, in order to prevent such situations from occurring, isolation technology becomes indispensable.

[0003] Isolation technology refers to a measure of isolating the object to be isolated from the vibration source by a special device to reduce the vibration impact. The current isolator mainly has three types, namely active isolator, passive isolator and hybrid isolator.

[0004] The active isolator is mostly a brake, which provides displacement or force to try to separate the vibration source from the platform. And it is equipped with a sensor for detecting the vibration source signal and error residual, and the control system uses the sensor signal to determine the optimal driving signal to be transmitted to the control actuator, so as to accurately and effectively control the vibration of the object to be isolated in different environments. However, pure active isolation needs to rely on external energy input, and the ability to suppress or eliminate wide-band vibration is weak.

[0005] The passive isolator usually refers to a spring or rubber damper, which absorbs the incoming vibration by its unique soft movement, easily changed shape and appropriate structure to consume vibration energy for isolation. The advantage is that it does not need to rely on external energy input, and the structure is simple, easy to realize and low in cost. The disadvantage is that the material properties are fixed, and the environmental adaptability is poor.

[0006] Hybrid vibration isolators combine active and passive vibration isolation into a single device to achieve a higher level of isolation. At lower frequencies, passive isolation elements provide only a low, baseline level of isolation, while the active isolation system attempts to fully control the system's dynamics, thereby reducing the transmitted vibration level and making it superior to the passive system itself. At higher frequencies, passive isolation elements are very effective and dominate the overall performance level. Passive elements also play a crucial buffering role between the active elements and the supporting foundation structure, handling vibrations left over from the active isolation system. Furthermore, when the active system is shut down, the system reverts to a passive isolation-only system. Existing passive vibration isolators typically use a single spring or rubber damping body, which has limited ability to absorb vibration waves, providing only a baseline level of isolation. They also suffer from poor environmental adaptability, low reliability, and a significant amount of vibration waves penetrating the single damping body, resulting in poor isolation performance. They are only suitable for vibrations under low load and low dynamic conditions, and their performance is poor at low frequencies.

[0007] The biggest difference between periodic materials or structures and homogeneous materials lies in their periodic arrangement. The frequency band gap in these structures causes refraction and reflection of elastic waves at different interfaces as they propagate. The superposition of these refracted and reflected waves with the incident wave prevents elastic waves in that frequency band from penetrating the periodic structure. Conversely, elastic waves in the frequency passband can penetrate the periodic structure. This unique filtering property provides new insights for vibration isolation design. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a hybrid active and passive piezoelectric vibration isolation support based on a layered periodic structure. The support first transmits the vibration to the rubber damping body of the layered periodic structure through the lower base. It utilizes the frequency band gap characteristics of the vibration wave in the periodic arrangement of the voids to block most of the frequency bands. In conjunction with the piezoelectric actuator, it actively cancels the residual vibration, thereby realizing the hybrid active and passive vibration isolation of the object to be isolated.

[0009] The present invention is accomplished by the following technical solution: a hybrid active and passive piezoelectric vibration isolation support based on a layered periodic structure, comprising a support body and a control system. The support body includes a piezoelectric actuator and a damping buffer. The piezoelectric actuator and the damping buffer are connected to each other by a sleeve to form a whole. The damping buffer is a layered periodic arrangement of damping buffer body. The control system controls the piezoelectric actuator to generate corresponding deformation to achieve vibration isolation.

[0010] Preferably, the damping buffer body has a plurality of hexagonal holes evenly arranged on it, and the hexagonal holes in the upper and lower adjacent layers form a triangular or square-arranged layered periodic structure.

[0011] Preferably, the damping buffer has an upper connector and a lower connector at both ends, the upper connector is sleeved on the sleeve, and the lower connector has at least two mounting holes symmetrically arranged at the bottom for connecting to an external base.

[0012] Preferably, a piezoelectric shunt damper is provided inside the hexagonal hole, and the piezoelectric shunt damper includes a piezoelectric fiber sheet, a resistor (R), and a capacitor (L).

[0013] Preferably, the piezoelectric actuator includes a housing, an upper sleeve, a piezoelectric stack, a force output rod, and a sleeve. The upper sleeve is installed on the upper end of the housing and is located below the housing. The opening of the sleeve faces the damping buffer. The upper connector of the damping buffer is connected inside the sleeve. The upper and lower ends of the piezoelectric stack are respectively fitted with an upper protective shell and a lower protective shell. The piezoelectric stack, the upper protective shell, and the lower protective shell are all placed inside the housing. The piezoelectric stack is connected to a controller outside the housing via a coaxial cable. The bottom end of the force output rod passes through the upper sleeve and abuts against the upper protective shell of the piezoelectric stack inside the housing. The upper end of the force output rod is located outside the upper sleeve. Multiple pre-tightening mechanical structures are provided between the upper protective shell of the piezoelectric stack and the upper sleeve. The pre-tightening force of the piezoelectric stack is controlled by adjusting the screwing depth of the pre-tightening mechanical structures.

[0014] Preferably, the upper sleeve has a hole of the same size as the force output rod at its center. The bottom end of the force output rod passes through the hole and abuts against the protective shell on the piezoelectric stack. Internal threaded holes are symmetrically arranged on both sides of the hole. The adjusting screw of the pre-tightening mechanism is threaded into the internal threaded hole. The pre-tightening force of the piezoelectric stack is determined by adjusting the screw's screw depth.

[0015] Preferably, the inner wall of the sleeve is provided with an internal thread, the outer wall of the upper connector is provided with a matching external thread, the upper connector is threadedly connected to the sleeve, the inner wall of the upper connector is provided with an elastic rubber layer, and the inner wall of the lower connector is also provided with an elastic rubber layer.

[0016] Preferably, the control system includes a piezoelectric fiber sheet, a charge amplifier, and a controller. The piezoelectric fiber sheet is disposed on the object to be isolated from vibration. The piezoelectric fiber sheet is connected to the charge amplifier and the controller in sequence through wires. The weak vibration signal of the object to be isolated detected by the piezoelectric fiber sheet is amplified by the charge amplifier and then input to the controller. The controller outputs a drive voltage control signal after closed-loop control calculation based on the received vibration signal. After receiving the control signal, the piezoelectric stack generates corresponding deformation using the inverse piezoelectric effect.

[0017] Preferably, the upper end of the force output rod is provided with an external thread, an internal thread, a flat head, or a ball head to facilitate connection with different vibration-isolated objects.

[0018] Preferably, a rubber strip is inserted into the interior of each hexagonal hole, and the inner cavity of the rubber strip is filled with resin-bonded glass fiber composite material.

[0019] The beneficial effects of this invention are as follows: The damping buffer has a layered periodic structure, utilizing the frequency band gap characteristics of vibration waves in the periodic arrangement of voids. Vibrations from the outside are first transmitted to the rubber damping body of the layered periodic structure through the lower base. The unique periodic structure of the rubber damping blocks the propagation of the waves. Most frequency bands are filtered when passing through the attenuation domain, and the residual vibration is transmitted to the upper isolated object. The piezoelectric fiber sheet below the isolated object detects its vibration characteristics. The charge amplifier amplifies the detected small signal and transmits it to the controller. The controller outputs the driving voltage control signal to the piezoelectric stack through closed-loop control, using the inverse piezoelectric effect to cause the piezoelectric stack to produce corresponding deformation. In conjunction with the force output rod on the upper side of the piezoelectric actuator, the residual vibration is actively eliminated. Finally, it is connected to the isolated object through a connector to achieve a hybrid active and passive vibration isolation of the isolated object. This vibration isolator can adapt to highly dynamic environments, has high reliability, and good durability. It has excellent vibration isolation effect in the mid-to-low frequency band and can effectively meet the requirements of a wide vibration isolation frequency band and a high vibration isolation effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0021] Figure 2 This is a schematic diagram of the operation of a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0022] Figure 3 This is a schematic diagram of a pressure actuator in a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0023] Figure 4 This is a schematic diagram of a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure, in which the damping buffers are arranged in a triangular pattern.

[0024] Figure 5 This is a schematic diagram of a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure, in which the damping buffers are arranged in a square pattern.

[0025] Figure 6 This is a schematic diagram of the upper sleeve structure of a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0026] Figure 7 This is a schematic diagram of the sleeve in a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0027] Figure 8This is a schematic diagram of the upper connecting component in a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0028] Figure 9 This is a schematic diagram of the lower connecting component of a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0029] Figure 10 This is a structural schematic diagram of a force output rod joint accessory in a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0030] Figure 11 This is a schematic diagram of piezoelectric shunt damping in a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0031] Figure 12 This is a schematic diagram of the cross-sectional structure of a rubber strip in a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure.

[0032] Labeling descriptions: 1. Support body; 2. Control system; 3. Piezoelectric actuator; 4. Damping buffer; 5. Base; 6. Isolated object; 21. Piezoelectric fiber sheet; 22. Charge amplifier; 23. Controller; 31. Housing; 32. Piezoelectric stack; 33. Upper protective shell of piezoelectric stack; 34. Lower protective shell of piezoelectric stack; 35. Force output rod; 36. Upper sleeve; 37. Pre-tightening mechanical structure; 38. Sleeve; 39. Coaxial cable; 311. Slot; 361. Hole; 362. Internal threaded hole; 371. Adjusting screw; 372. Knob; 41. Damping buffer body; 42. Upper connector; 43. Lower connector; 44. Elastic rubber layer; 45. Mounting hole; 46. Hexagonal hole; 7. Piezoelectric fiber sheet for piezoelectric shunt damping; 8. Rubber strip; 9. Resin-bonded glass fiber composite material. Detailed Implementation

[0033] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0034] Reference Figures 1-9As shown, the first embodiment of the present invention provides a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure, including a support body 1 and a control system 2 connected to the support body. The support body 1 includes a piezoelectric actuator 3 and a damping buffer 4. The control system controls the piezoelectric actuator to generate corresponding deformation to achieve vibration isolation. The damping buffer 4 is a layered periodic structure, and the piezoelectric actuator 3 is a piezoelectric actuator with adjustable preload. The piezoelectric actuator 3 and the damping buffer 4 are connected to each other by a sleeve 38 to form a whole. In use, the bottom of the damping buffer 4 is connected to the external base 5, and the upper end of the force output rod at the top of the piezoelectric actuator 3 is connected to the object to be isolated 6. The vibration from the vibration source first plays a very important buffering role through the layered periodic structure damping buffer, and reduces most of the vibration. After passing through this buffer area, the vibration remaining in the system will be transmitted to the piezoelectric actuator for active vibration isolation, realizing the hybrid active-passive vibration isolation of the object to be isolated.

[0035] The damping buffer 4 is a layered, periodically arranged damping buffer body. The layered, periodically arranged rubber damping body utilizes the frequency band gap characteristics of the vibration waves in the periodic arrangement of voids to block most frequency bands. The damping buffer 4 has an upper connector 42 and a lower connector 43 at both ends, and the damping buffer 4 is connected to the sleeve via the upper connector 42. Both the inner walls of the upper and lower connectors are provided with elastic rubber layers 44. The bottom of the lower connector has at least two symmetrical mounting holes 45 for connection to an external base.

[0036] The damping buffer body 4 has a plurality of hexagonal holes 46 evenly arranged on it. The hexagonal holes in the upper and lower adjacent layers form a triangular or square-arranged layered periodic structure. In the triangular arrangement, the attenuation, width, start frequency, and cutoff frequency of the periodic structure are all greater than those in the square arrangement. Therefore, when it is necessary to isolate low-frequency vibrations, a square-arranged periodic form can be selected; when it is necessary to isolate higher and wider frequency vibrations, a square-arranged periodic form can also be selected. Different arrangement forms can better cope with different working conditions.

[0037] The piezoelectric actuator 3 includes a housing 31, a piezoelectric stack 32, an upper protective shell 33 for the piezoelectric stack, a lower protective shell 34 for the piezoelectric stack, a force output rod 35, an upper sleeve 36, and a pre-tightening mechanical structure 37. The piezoelectric stack 32 is connected to a controller outside the housing via a coaxial cable 39. A slot 311 is opened on one side of the housing, through which the coaxial cable 39 is led out and connected to the controller 23. The sleeve 38 is fixed to the bottom of the housing, with its opening facing the damping buffer 4. The inner wall of the sleeve is provided with internal threads, and the outer wall of the upper connecting member 42 has a matching external thread. The upper connecting member 42 of the damping buffer is threadedly connected inside the sleeve 38. The upper protective shell 33 and the lower protective shell 34 are respectively sleeved on the upper and lower ends of the piezoelectric stack 32. The piezoelectric stack 32, the upper protective shell 33, and the lower protective shell 34 are placed inside the housing, and the upper sleeve 36 is installed on the upper end of the housing.

[0038] The upper sleeve 36 has a hole 361 of the same size as the force output rod at its upper center. The bottom end of the force output rod 35 passes through the hole 361 and is fixed to the piezoelectric stack upper protective shell 33 inside the housing. The upper end of the force output rod 35 is placed outside the upper sleeve, and the upper sleeve hole 361 and the force output rod 35 are connected with a minimum clearance of zero. Multiple pre-tightening mechanical structures 37 are provided between the piezoelectric stack upper protective shell 33 and the upper sleeve 36. The pre-tightening mechanical structure 37 includes an adjusting screw 371 and a knob 372. The upper sleeve hole 361 has symmetrically arranged internal threaded holes 362 on both sides. The adjusting screw 371 is threaded into the internal threaded hole 362. The bottom of the adjusting screw 371 abuts against the piezoelectric stack upper protective shell 33, and the upper end of the adjusting screw 371 extends out of the upper sleeve. The knob is located on the upper end of the adjusting screw 371. The pre-tightening force of the piezoelectric stack 32 is controlled by adjusting the screw insertion depth of the adjusting screw through the knob. The upper end of the force output rod 35 is provided with an external thread 351, an internal thread 352, a flat head 353, or a ball head 354. Preferably, the upper end of the force output rod is an end with an external thread 351, an internal thread 352, a flat head 353, or a ball head 354. The end is detachably connected to the force output rod, which facilitates the use of different top structures of the force output rod to meet the connection with different vibration-isolated objects.

[0039] The control system 2 includes a piezoelectric fiber sheet 21, a charge amplifier 22, and a controller 23. The piezoelectric fiber sheet 21 is disposed on the vibration-isolated object 6 and is connected to the charge amplifier 22 and the controller 23 in sequence through wires.

[0040] Working principle: When the base 5 is subjected to external vibration, the external vibration is first transmitted to the layered periodic structure damper 4 through the lower base 5. The unique periodic structure of the rubber damper blocks the propagation of the wave, playing a very important buffering role. Most frequency band waves are filtered when passing through the attenuation domain, and most of the vibration energy is reduced, thus achieving passive vibration isolation. After vibration isolation, the residual vibration is transmitted to the upper isolated object 6. The piezoelectric fiber sheet 21 below the isolated object detects its vibration characteristics. The weak vibration signal of the isolated object detected by the piezoelectric fiber sheet is amplified by the charge amplifier 22 and input to the controller 23. The controller 23 receives the residual vibration signal and outputs a drive voltage control signal after closed-loop control calculation. The controller 23 outputs the drive voltage control signal to the piezoelectric stack 32 through the coaxial cable 39. The piezoelectric stack 32 receives the control signal and uses the inverse piezoelectric effect to generate a corresponding deformation. In conjunction with the force output rod on the upper side of the piezoelectric actuator, it actively eliminates the residual vibration. Finally, the force output rod is connected to the isolated object to achieve a hybrid active and passive vibration isolation for the isolated object. The active component is combined with the passive component in series. Vibrations from the vibration source first pass through a layered periodic structure damper to reduce most of the higher frequency vibrations, and then are actively isolated by a piezoelectric actuator, thus achieving effective vibration control. This vibration isolator can adapt to highly dynamic environments, has high reliability and durability. It has excellent vibration isolation effect in the mid-to-low frequency range and can effectively meet the requirements of a wide isolation frequency band and high isolation effect.

[0041] In summary, compared with a standalone active vibration isolator, the vibration isolation support of this invention can cope with higher frequency vibrations, and the vibration isolator has stronger reliability in actual operation. When the active vibration isolation element fails to work properly, the passive vibration isolation device in this vibration isolator still has a certain vibration isolation effect and will not completely fail. Compared with a standalone passive vibration isolator, the introduction of a periodic structure acts as a filter, which can effectively filter out some specific waves, greatly improving the vibration isolation effect of this device in the mid-to-low frequency range, and fully broadening the frequency bandwidth of effective vibration isolation.

[0042] Reference Figures 1-11 As shown, the second embodiment of the present invention provides a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure, which is basically the same as the first embodiment, except that: a piezoelectric shunt damper is pasted inside the hexagonal hole, and the piezoelectric shunt damper includes a piezoelectric fiber sheet 7, a resistor (R), and a capacitor (L). The piezoelectric shunt damper converts externally transmitted energy into mechanical energy through the piezoelectric effect, and then uses an external RL circuit to convert the electrical energy into heat energy for dissipation, thereby achieving attenuation of vibration energy.

[0043] When the base 5 is subjected to external vibration, the vibration is first transmitted to the layered periodic structure damper 4 through the lower base 5. The unique periodic structure of the rubber damper blocks the propagation of the vibration; most frequency bands are filtered out as they pass through the attenuation domain, and most of the vibration energy is reduced, achieving passive vibration isolation. The remaining energy is transmitted to the piezoelectric shunt damper inside the hexagonal holes, where the external energy is converted from mechanical energy to electrical energy through the piezoelectric effect. Then, an external RL circuit converts the electrical energy into heat energy for dissipation, achieving attenuation of the vibration energy. The residual vibration is actively isolated by the piezoelectric actuator, thus achieving effective vibration control.

[0044] Reference Figure 12 As shown, the third embodiment of the present invention provides a hybrid active-passive piezoelectric vibration isolation support based on a layered periodic structure, which is basically the same as the first embodiment, except that: a rubber strip 8 is inserted into each hexagonal hole, and the inner cavity of the rubber strip is filled with resin-bonded glass fiber composite material 9. The resin-bonded glass fiber composite material is filled with air bubbles, which can withstand a certain amount of compressive impact and vibration.

[0045] When the base 5 is subjected to external vibration, the vibration is first transmitted to the layered periodic structure damper 4 through the lower base 5. The unique periodic structure of the rubber damper blocks the propagation of the vibration; most frequency bands are filtered out as they pass through the attenuation domain, and most of the vibration energy is reduced, achieving passive vibration isolation. The remaining energy is transmitted to the resin-bonded glass fiber composite material inside the hexagonal holes, where it withstands a certain amount of compressive impact and vibration. The residual vibration is then actively isolated by the piezoelectric actuator, thus achieving effective vibration control.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A hybrid active-passive piezoelectric vibration isolation mount based on a layered periodic structure, characterized by: The application relates to a passive-active hybrid piezoelectric vibration isolation support based on a layered periodic structure, which comprises a support body and a control system, wherein the support body comprises a piezoelectric actuator and a damping buffer, the piezoelectric actuator and the damping buffer are connected in a whole through sleeve nesting, the damping buffer is a layered periodic arrangement damping buffer body, and the control system controls the piezoelectric actuator to generate corresponding deformation to realize vibration isolation; the piezoelectric actuator comprises a shell, the sleeve is located below the shell, the opening of the sleeve faces the damping buffer, the damping buffer is connected to the sleeve, the two ends of the damping buffer are respectively provided with an upper connector and a lower connector, the inner wall of the sleeve is provided with internal threads, the outer wall of the upper connector is provided with matched external threads, the upper connector is threadedly connected to the sleeve, the bottom of the lower connector is symmetrically provided with at least two mounting holes for being connected to an external base, a plurality of hexagonal holes are uniformly arranged on the damping buffer body, the areas between the upper and lower adjacent layers of the hexagonal holes form a triangular arrangement layered periodic structure or a square arrangement layered periodic structure, and a piezoelectric shunt damping is arranged in the hexagonal hole.

2. The passive-active hybrid piezoelectric vibration isolation support based on a layered periodic structure according to claim 1, wherein the piezoelectric actuator further comprises an upper sleeve, a piezoelectric stack and a force output rod, the upper sleeve is mounted at the opening of the upper end of the shell, the upper and lower ends of the piezoelectric stack are respectively sleeved with a piezoelectric stack upper protective shell and a piezoelectric stack lower protective shell, the piezoelectric stack, the piezoelectric stack upper protective shell and the piezoelectric stack lower protective shell are arranged in the shell, the piezoelectric stack is connected to the controller outside the shell through a coaxial cable, the bottom end of the force output rod penetrates through the upper sleeve and abuts against the piezoelectric stack upper protective shell in the shell, the upper end of the force output rod is arranged outside the upper sleeve, a plurality of pre-tightening mechanical structures are arranged between the piezoelectric stack upper protective shell and the upper sleeve, the pre-tightening force of the piezoelectric stack is controlled by adjusting the screwing depth of the pre-tightening mechanical structures, a hole with a size equal to that of the force output rod is left at the center position of the upper end of the upper sleeve, the bottom end of the force output rod penetrates through the hole and abuts against the piezoelectric stack upper protective shell, and the two sides of the hole are symmetrically provided with internal thread holes, the adjusting screws of the pre-tightening mechanical structures are threadedly connected in the internal thread holes, and the pre-tightening force of the piezoelectric stack is determined by adjusting the screwing depth of the adjusting screws. The inner wall of the upper connector is provided with an elastic rubber layer, and the inner wall of the lower connector is also provided with an elastic rubber layer.

3. The active-passive hybrid piezoelectric vibration isolation mount based on a layered periodic structure according to claim 1 or 2, characterized in that: The control system comprises a piezoelectric fiber sheet, a charge amplifier and a controller, the piezoelectric fiber sheet is arranged on a vibration-isolated object, the piezoelectric fiber sheet is sequentially connected to the charge amplifier and the controller through wires, the weak vibration signal of the vibration-isolated object detected by the piezoelectric fiber sheet is input to the controller after being amplified by the charge amplifier, the controller outputs a driving voltage control signal after closed-loop control calculation according to the received vibration signal, and the piezoelectric stack generates corresponding deformation by using the inverse piezoelectric effect after receiving the control signal.

4. The active-passive hybrid piezoelectric vibration isolation mount based on layered periodic structure according to claim 2, characterized in that: The upper end of the force output rod is provided with external threads, internal threads, a flat head or a ball head to meet the connection with different vibration-isolated objects.

5. The active-passive hybrid piezoelectric vibration isolation mount based on layered periodic structure according to claim 4, characterized in that: ​

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