LU505544B1 - System and method for actively suppressing vibration of flexible truss structure based on piezoelectric materials - Google Patents
System and method for actively suppressing vibration of flexible truss structure based on piezoelectric materials Download PDFInfo
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- LU505544B1 LU505544B1 LU505544A LU505544A LU505544B1 LU 505544 B1 LU505544 B1 LU 505544B1 LU 505544 A LU505544 A LU 505544A LU 505544 A LU505544 A LU 505544A LU 505544 B1 LU505544 B1 LU 505544B1
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- fixedly connected
- connecting shaft
- buffering
- far away
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- 239000000463 material Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 53
- 230000003139 buffering effect Effects 0.000 claims abstract description 36
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 32
- 239000010432 diamond Substances 0.000 claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The application discloses a system and a method for actively suppressing vibration of a flexible truss structure based on piezoelectric materials, belonging to the technical field of vibration control. The system includes two first connecting frames, where a plurality of first connecting rods are fixedly connected between the two first connecting frames; the two first connecting rods at the top of the first connecting frames are respectively fixedly connected with buffering mechanisms; the two first connecting rods at the bottom of the first connecting frames are respectively fixedly connected with driving mechanisms, one end of the buffering mechanism, the driving mechanism far away from the first connecting rod is provided with a diamond actuator. When a flexible truss structure consisting of two first connecting frames, a plurality of first connecting rods, buffering mechanisms, driving mechanisms, a diamond actuator vibrates, the diamond actuator actively suppresses vibration, the buffering mechanisms.
Description
DESCRIPTION LU505544
SYSTEM AND METHOD FOR ACTIVELY SUPPRESSING VIBRATION OF FLEXIBLE
TRUSS STRUCTURE BASED ON PIEZOELECTRIC MATERIALS
The application belongs to the technical field of vibration control, and in particular to a system and a method for actively suppressing vibration of a flexible truss structure based on piezoelectric materials.
As an intelligent material, piezoelectric materials have been widely studied and applied in various engineering structures. It can not only produce charge output (positive piezoelectric effect) under the action of external force field, but also produce force or displacement output (inverse piezoelectric effect) under the action of external electric field. Therefore, piezoelectric materials have been widely used in the fields of sensors and actuators. Piezoelectric actuator makes use of the inverse piezoelectric effect of piezoelectric materials. Piezoelectric actuator has been widely used in aerospace, machinery, electric power and other fields because of its high resolution of output displacement, fast response and low power consumption. It is one of the most promising intelligent actuators at present.
Large-scale flexible space truss structure has the advantages of light weight, convenient manufacturing process, convenient disassembly and assembly in space, flexible and rich configurations, and can realize structural shape adjustment, which can meet the space mission design requirements of most spacecraft structures, so it is widely used in spacecraft structures. However, due to its large size, light weight, obvious flexibility and weak damping, the flexible space truss structure will inevitably be disturbed by various external and internal factors when working in space, thus arousing low-frequency, nonlinear and large-scale vibration, and once aroused, it will be difficult to attenuate itself, which will interfere with the normal work of the attitude control system 505544 and seriously affect the positioning accuracy of spacecraft.
The present application aims to provide a system and a method for actively suppressing vibration of a flexible truss structure based on piezoelectric materials, so as to solve the problems existing in the prior art.
In order to achieve the above purpose, the application provides the following scheme: the application provides a system for actively suppressing vibration of a flexible truss structure based on piezoelectric materials, which includes two first connecting frames, where a plurality of first connecting rods are fixedly connected between the two first connecting frames; the two first connecting rods at the top of the first connecting frames are respectively fixedly connected with buffering mechanisms; and the two first connecting rods at the bottom of the first connecting frames are respectively fixedly connected with driving mechanisms, one end of the buffering mechanism and the driving mechanism far away from the first connecting rod is provided with a diamond actuator.
Optionally, the diamond actuator includes diamond frames fixedly connected with the buffering mechanism and the driving mechanism respectively, a piezoelectric stack is installed in the diamond frame, and displacement sensors are installed on both sides of the diamond frame respectively, and the displacement sensors are electrically connected with an external controller.
Optionally, the buffering mechanism includes a first connecting rope fixedly connected with the first connecting rod at the top of the first connecting frame, one end of the first connecting rope far away from the first connecting rod is fixedly connected with a buffering part, and one end of the buffering part far away from the first connecting rope is fixedly connected with a second connecting rope, and the second connecting rope is fixedly connected with the diamond frame.
Optionally, the buffering part includes a first connecting shaft fixedly connected With 505544 the first connecting rope, and one end of the first connecting shaft far away from the first connecting rope is slidably connected with a second connecting shaft, the second connecting shaft is fixedly connected with the second connecting rope, the second connecting shaft is hollow, the first connecting shaft is slidably connected in the second connecting shaft, and one end of the first connecting shaft extending into the second connecting shaft is fixedly connected with a limit ring, the limit ring abuts against the inner wall of the second connecting shaft, and a first spring is fixedly connected between the first connecting shaft and the inner wall of the second connecting shaft.
Optionally, the driving mechanism includes a third connecting rope fixedly connected with the first connecting rod at the bottom of the first connecting frame, one end of the third connecting rope far away from the first connecting rod is fixedly connected with a third connecting shaft, one end of the third connecting shaft far away from the third connecting rope is slidably connected with a fourth connecting shaft, and one end of the fourth connecting shaft far away from the third connecting shaft is fixedly connected with a fourth connecting rope, and the fourth connecting rope is fixedly connected with the diamond frame. The fourth connecting shaft is hollow, one end of the third connecting shaft far away from the third connecting rope is located in the fourth connecting shaft and is fixedly connected with a first motor, the output shaft of the first motor is fixedly connected with a lead screw, a slider is fixedly connected in the fourth connecting shaft, and the slider is in transmission connection with the lead screw.
The method for actively suppressing vibration of the flexible truss structure based on piezoelectric materials is characterized by including following steps: 1) respectively setting two first buffering mechanisms and driving mechanisms in a pre-tightening state, so that the system is in a static balance position; 2) when the system is excited, the external controller receives the signal from the displacement sensor to make the diamond actuator work; and 3) the buffering mechanisms and the driving mechanisms assist the system to suppress vibration.
The application discloses following technical effects: when a flexible truss structure, oc 44 consisting of two first connecting frames, a plurality of first connecting rods, buffering mechanisms, driving mechanisms and a diamond actuator vibrates, the diamond actuator actively suppresses vibration, the buffering mechanisms and the driving mechanisms assist in suppressing vibration.
The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application, and do not constitute an improper limitation of this application. In the attached drawings:
FIG. 1 is a schematic structural diagram of a system for actively suppressing vibration of a flexible truss structure based on piezoelectric materials;
FIG. 2 is a schematic structural diagram of the buffering mechanism of the present application;
FIG. 3 is a schematic structural view of the driving mechanism of the present application.
In the figures: 1. first connecting frame; 2. first connecting rod; 3. diamond frame; 4. piezoelectric stack; 5. displacement sensor; 6. first connecting rope; 7. second connecting rope; 8. first connecting shaft; 9. second connecting shaft; 10. limit ring; 11. first spring; 12. third connecting rope; 14. third connecting shaft; 15. fourth connecting shaft; 16. fourth connecting rope; 17. first motor; 18. first motor; 19. slider.
DESCRIPTION OF THE APPLICATION LU505544
In the following, the technical scheme in the embodiment of the application will be clearly and completely described with reference to the attached drawings. Obviously, the described embodiment is only a part of the embodiment of the application, but not the whole embodiment. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative labor belong to the scope of protection of the present application.
In order to make the above objects, features and advantages of the present application more obvious and easier to understand, the present application will be further described in detail with the attached drawings and specific embodiments.
Referring to FIG. 1- FIG. 3, the present application provides a system for actively suppressing vibration of the flexible truss structure based on piezoelectric materials, which includes two first connecting frames 1, a plurality of first connecting rods 2 are fixedly connected between the two first connecting frames 1, the two first connecting rods 2 at the top of the first connecting frames 1 are respectively fixedly connected with buffering mechanisms, and the two first connecting rods 2 at the bottom of the first connecting frames 1 are respectively fixedly connected with driving mechanisms, one end of the buffering mechanism and the driving mechanism far away from the first connecting rod is provided with a diamond actuator.
When the flexible truss structure consisting of two first connecting frames 1, a plurality of first connecting rods 2, buffering mechanisms, driving mechanisms and a diamond actuator is excited, the diamond actuator is used for active vibration suppression, and the buffering mechanisms and the driving mechanisms are used for auxiliary vibration suppression.
In a further optimization scheme, the diamond actuator includes diamond frames 3 fixedly connected with the buffering mechanism and the driving mechanism respectively, a piezoelectric stack 4 is installed in the diamond frame 3, and displacement sensors 5 are respectively installed on both sides of the diamond frame 3, and the displacement sensors 5 are electrically connected with an external controller.
In a further optimization scheme, the buffering mechanism includes a first 505544 connecting rope 6 fixedly connected with the first connecting rod 2 at the top of the first connecting frame 1, one end of the first connecting rope 6 far away from the first connecting rod 2 is fixedly connected with a buffering part, and one end of the buffering part far away from the first connecting rope 6 is fixedly connected with a second connecting rope 7, and the second connecting rope 7 is fixedly connected with the diamond frame 3.
In a further optimization scheme, the buffering part includes a first connecting shaft 8 fixedly connected with the first connecting rope 6, a second connecting shaft 9 is slidably connected with one end of the first connecting shaft 8 far away from the first connecting rope 6, the second connecting shaft 9 is fixedly connected with the second connecting rope 7, the second connecting shaft 9 is hollow, the first connecting shaft 8 is slidably connected with the second connecting shaft 9, and one end of the first connecting shaft 8 extending into the second connecting shaft 9 is fixedly connected with a limit ring 10, and the limit ring 10 abuts against the inner wall of the second connecting shaft 9, and a first spring 11 is fixedly connected between the first connecting shaft 8 and the inner wall of the second connecting shaft 9.
In a further optimization scheme, the driving mechanism includes a third connecting rope 12 fixedly connected with the first connecting rod 2 located at the bottom of the first connecting frame 1, one end of the third connecting rope 12 far away from the first connecting rod 2 is fixedly connected with a third connecting shaft 14, one end of the third connecting shaft 14 far away from the third connecting rope 12 is slidably connected with a fourth connecting shaft 15, and one end of the fourth connecting shaft far away from the third connecting shaft 14 is fixedly connected with the diamond frame 3. The fourth connecting shaft 15 is hollow, and one end of the third connecting shaft 14 far away from the third connecting rope 12 is located in the fourth connecting shaft 15 and is fixedly connected with the first motor 18. The output shaft of the first motor 18 is fixedly connected with a lead screw, and a slider 19 is fixedly connected in the fourth connecting shaft 15, and the slider 19 is in transmission connection with the lead screw.
The method for actively suppressing vibration of the flexible truss structure based 505544 piezoelectric materials is characterized by including following steps: 1) respectively setting two first buffering mechanisms and driving mechanisms in a pre-tightening state, so that the system is in a static balance position; 2) when the system is excited, the external controller receives the signal from the displacement sensor 5 to make the diamond actuator work; 3) the buffering mechanisms and the driving mechanisms assist the system to suppress vibration.
In the description of the invention, it is to be understood that the orientation or position relationships indicated by the terms " longitudinal ", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc, are based on the orientation or position relationships shown in the attached drawings and are intended only to facilitate the description of the invention. It is not indicated or implied that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as a limitation of the present invention.
The above-mentioned embodiments only describe the preferred mode of the application, and do not limit the scope of the application. Under the premise of not departing from the design spirit of the application, various modifications and improvements made by ordinary technicians in the field to the technical scheme of the application shall fall within the protection scope determined by the claims of the application.
Claims (6)
1. A system for actively suppressing vibration of a flexible truss structure based on piezoelectric materials, characterized by comprising two first connecting frames (1), a plurality of first connecting rods (2) are fixedly connected between the two first connecting frames (1), the two first connecting rods (2) at the top of the first connecting frames (1) are respectively fixedly connected with buffering mechanisms, and the two first connecting rods (2) at the bottom of the first connecting frames (1) are respectively fixedly connected with driving mechanisms, one end of the buffering mechanism and the driving mechanism far away from the first connecting rod is provided with a diamond actuator.
2. The system for actively suppressing vibration of the flexible truss structure based on piezoelectric materials according to claim 1, characterized in that the diamond actuator includes diamond frames (3) fixedly connected with the buffering mechanism and the driving mechanism respectively, a piezoelectric stack (4) is installed in the diamond frame (3), and displacement sensors (5) are respectively installed on both sides of the diamond frame (3), and the displacement sensors (5) are electrically connected with an external controller.
3. The system for actively suppressing vibration of the flexible truss structure based on piezoelectric materials according to claim 2, characterized in that the buffering mechanism includes a first connecting rope (6) fixedly connected with the first connecting rod (2) at the top of the first connecting frame (1), one end of the first connecting rope (6) far away from the first connecting rod (2) is fixedly connected with a buffering part, and one end of the buffering part far away from the first connecting rope (6) is fixedly connected with a second connecting rope (7), and the second connecting rope (7) is fixedly connected with the diamond frame (3).
4. The system for actively suppressing vibration of the flexible truss structure based 505544 on piezoelectric materials according to claim 3, characterized in that the buffering part includes a first connecting shaft (8) fixedly connected with the first connecting rope (6), a second connecting shaft (9) is slidably connected with one end of the first connecting shaft (8) far away from the first connecting rope (6), the second connecting shaft (9) is fixedly connected with the second connecting rope (7), the second connecting shaft (9) is hollow, the first connecting shaft (8) is slidably connected with the second connecting shaft (9), and one end of the first connecting shaft (8) extending into the second connecting shaft (9) is fixedly connected with a limit ring (10), and the limit ring (10) abuts against the inner wall of the second connecting shaft (9), and a first spring (11) is fixedly connected between the first connecting shaft (8) and the inner wall of the second connecting shaft (9).
5. The system for actively suppressing vibration of the flexible truss structure based on piezoelectric materials according to claim 2, characterized in that the driving mechanism comprises a third connecting rope (12) fixedly connected with the first connecting rod (2) located at the bottom of the first connecting frame (1), one end of the third connecting rope (12) far away from the first connecting rod (2) is fixedly connected with a third connecting shaft (14), one end of the third connecting shaft (14) far away from the third connecting rope (12) is slidably connected with a fourth connecting shaft (15), and one end of the fourth connecting shaft (15) far away from the third connecting shaft (14) is fixedly connected with the diamond frame (3); the fourth connecting shaft (15) is hollow, and one end of the third connecting shaft (14) far away from the third connecting rope (12) is located in the fourth connecting shaft (15) and is fixedly connected with the first motor (18); the output shaft of the first motor (18) is fixedly connected with a lead screw, and a slider (19) is fixedly connected in the fourth connecting shaft (15), and the slider (19) is in transmission connection with the lead screw.
6. A control method of the system for actively suppressing vibration of the flexible 505544 truss structure based on piezoelectric materials according to any one of claims 1-5, characterized by comprising following steps:
1) respectively setting two first buffering mechanisms and driving mechanisms in a pre-tightening state, so that the system is in a static balance position;
2) when the system is excited, the external controller receives the signal from the displacement sensor (5) to make the diamond actuator work; and
3) the buffering mechanisms and the driving mechanisms assist the system to suppress vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU505544A LU505544B1 (en) | 2023-11-16 | 2023-11-16 | System and method for actively suppressing vibration of flexible truss structure based on piezoelectric materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU505544A LU505544B1 (en) | 2023-11-16 | 2023-11-16 | System and method for actively suppressing vibration of flexible truss structure based on piezoelectric materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU505544B1 true LU505544B1 (en) | 2024-05-16 |
Family
ID=91129052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU505544A LU505544B1 (en) | 2023-11-16 | 2023-11-16 | System and method for actively suppressing vibration of flexible truss structure based on piezoelectric materials |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU505544B1 (en) |
-
2023
- 2023-11-16 LU LU505544A patent/LU505544B1/en active
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