Attached integrated active vibration absorber

Abstract

The invention discloses an attached type integrated active vibration absorber which comprises a base, an actuator, a control panel and an acceleration sensing chip. The actuator is mounted on the base; the control panel and the acceleration sensing chip are mounted in the base; the attached type integrated active vibration absorber is installed on a controlled structure through a base. According to the attached type integrated active vibration absorber, the acceleration sensing chip, the control panel and the actuator are integrated to achieve active vibration absorption, the attached type integrated active vibration absorber has the advantages of being light in weight, small in size and the like, can be attached to the surface of a star, occupies extremely small space on the star, can achieve overall control in a cooperative mode and has very high engineering application value.

Description

Technical Field

[0001] The invention belongs to the technical field of satellite design and application, and in particular relates to an attached integrated active vibration absorber. Background Art

[0002] When a spacecraft is in orbit, the moving parts on the spacecraft, such as momentum wheels, control torque gyroscopes, and refrigerators, generate slight vibrations, which are transmitted to key payloads such as cameras and laser heads that require high precision and stability, affecting the quality of space mission completion. To this end, various vibration reduction and isolation measures are taken on the spacecraft to reduce the impact of the vibration of moving parts on precision payloads. Common vibration suppression measures include passive vibration absorption technology, active vibration absorption system, passive vibration isolation technology, and active vibration isolation technology.

[0003] The advantage of vibration absorption technology is that it does not need to be connected in series in the structural force transmission, and can be installed in an attached manner, which is convenient and easy. The frequency and output force of the active vibration absorption device are adjustable, and it is gradually applied on spacecraft. The active vibration absorption system includes sensors, actuators, and controllers. The active dynamic vibration absorption device uses actuators for motion compensation based on the motion information measured in real time by the sensor, which can effectively reduce the impact of the space micro-vibration environment on precision equipment and ensure the high-quality completion of space missions. In the traditional active vibration absorption scheme, the sensor, controller, and actuator are independent of each other, respectively realizing motion measurement, driving force solution, and actuation compensation. The functions are dispersed, the degree of integration is low, the volume and weight are large, and the signal transmission between each other involves cable layout and other issues. Considering the increasing size of spacecraft and the extremely limited resources on board, the above characteristics limit the space application of active vibration absorption devices to a certain extent. Summary of the invention

[0004] The technology of the present invention solves the problem: overcomes the shortcomings of the prior art, provides an attached integrated active vibration absorber, integrates the acceleration sensor chip, the control board, and the actuator to achieve active vibration absorption, has the advantages of light weight and small size, can be attached to the surface of a satellite, occupies very little space on the satellite, and multiple vibration absorbers can work together to achieve overall control, and has strong engineering application value.

[0005] In order to solve the above technical problems, the present invention discloses an attached integrated active vibration absorber, comprising: a base, an actuator, a control board and an acceleration sensor chip; wherein the actuator is installed on the base; the control board and the acceleration sensor chip are installed in the base; and the attached integrated active vibration absorber is installed on the controlled structure through the base.

[0006] In the above-mentioned attached integrated active vibration absorber, the base includes: a base chassis and a base column section; wherein the base column section is installed on the base chassis by screws or gluing and is located inside the base.

[0007] In the above-mentioned attached integrated active vibration absorber, the control board is connected to the base chassis or the base column section by means of screws or gluing.

[0008] In the above-mentioned attached integrated active vibration absorber, the acceleration sensor chip is installed on the control board by welding to measure the longitudinal acceleration of the controlled structure; wherein f1>4f2, f1 represents the natural frequency of the acceleration sensor chip after installation, and f2 represents the frequency of the controlled structure.

[0009] In the above-mentioned attached integrated active vibration absorber, the actuator comprises: an actuator housing, a coil assembly and an actuator mover; wherein the actuator housing is mounted on a base; and the coil assembly and the actuator mover are arranged in the actuator housing.

[0010] In the above-mentioned attached integrated active vibration absorber, the actuator housing includes: a lower cover, an outer tube and an upper cover; wherein one end of the outer tube is connected to the lower cover, and the other end is connected to the upper cover; and the lower cover is connected to the base column section.

[0011] In the above-mentioned attached integrated active vibration absorber, the coil assembly is laterally mounted on the inner wall of the outer cylinder by means of screws.

[0012] In the above-mentioned attached integrated active vibration absorber, the actuator mover includes: a first diaphragm spring, a magnetic steel, a second diaphragm spring and a connecting piece; wherein one end of the magnetic steel is connected to the second diaphragm spring, and the other end is connected to the first diaphragm spring through the connecting piece.

[0013] In the above-mentioned attached integrated active vibration absorber, a through hole is opened in the middle of the coil assembly for avoiding the connecting piece.

[0014] In the above-mentioned attached integrated active vibration absorber, the output wire of the coil assembly is connected to the control board through the opening of the coil assembly and the opening of the lower cover; the opening on the side of the base is used to install the external electrical connector.

[0015] The present invention has the following advantages:

[0016] (1) The present invention discloses an attached integrated active vibration absorber, which realizes the integrated design of sensing, control and actuation in a relatively small volume, and can realize the functions of measurement, solution and actuation without relying on external information input.

[0017] (2) The present invention discloses an attached integrated active vibration absorber with a strongly coupled nested conformal integrated design, which ensures that the attached integrated active vibration absorber is light in weight and small in size, and has a significant weight reduction compared with similar products.

[0018] (3) The present invention discloses an attached integrated active vibration absorber with a compact structure and a simple external interface. It can be directly attached and installed on the surface of a satellite, effectively simplifying the installation workflow, and multiple devices can work together to form a distributed active vibration absorption system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a block diagram of a composition of an attached integrated active vibration absorber in an embodiment of the present invention;

[0020] Figure 2 This is a working principle diagram of an attached integrated active vibration absorber in an embodiment of the present invention;

[0021] Figure 3 It is a structural schematic diagram of an attached integrated active vibration absorber in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] One of the core ideas of the present invention is: to meet the demand for active suppression of micro-vibrations of precision space equipment, an attached integrated active vibration absorber is provided. Through a nested layout, a highly efficient integrated design of sensing, control, and actuation is achieved. The external mechanical interface is simple and can be attached and installed on the surface of a satellite. Compared with a vibration absorption system with independent sensors, actuators, and controllers, the weight and volume are significantly reduced.

[0024] like Figure 1 As shown, in this embodiment, the attached integrated active vibration absorber includes: a base, an actuator, a control board 4 and an acceleration sensor chip 5. The actuator is mounted on the base; the control board 4 and the acceleration sensor chip 5 are mounted in the base; and the attached integrated active vibration absorber is mounted on the controlled structure through the base.

[0025] In this embodiment, the base includes: a base chassis 1 and a base column section 2. The base column section 2 is mounted on the base chassis 1 by screws or adhesives. It should be noted that the base chassis 1 and the base column section 2 can be two independent parts, or they can be designed as an integrated unit, that is, the base can be directly integrated and processed.

[0026] Furthermore, the control panel 4 is connected to the base chassis 1 or the base column section 2 by screws or gluing, and is located inside the base.

[0027] Furthermore, the acceleration sensor chip 5 is mounted on the control board 4 by welding to measure the longitudinal direction ( Figure 1 The acceleration sensor chip 5 needs to be firmly connected to the control board 4, and the natural frequency f1 of the acceleration sensor chip 5 after installation and the frequency f2 of the controlled structure meet the following conditions: f1>4f2.

[0028] Furthermore, a hole is opened on the side of the base to install an external electrical connector.

[0029] In this embodiment, the actuator comprises: an actuator housing, a coil assembly 7 and an actuator mover. The actuator housing is mounted on a base; the coil assembly 7 and the actuator mover are arranged in the actuator housing.

[0030] Furthermore, the actuator housing includes: a lower cover 3, an outer cylinder 10 and an upper cover 11. One end of the outer cylinder 10 is connected to the lower cover 3, and the other end is connected to the upper cover 11; the lower cover 3 is connected to the base column section 2.

[0031] Furthermore, the actuator mover includes: a first diaphragm spring 6, a magnetic steel 8, a second diaphragm spring 9 and a connecting piece 12. Among them, one end of the magnetic steel 8 is connected to the second diaphragm spring 9, and the other end is connected to the first diaphragm spring 6 through the connecting piece 12. The magnetic steel 8, the first diaphragm spring 6, and the second diaphragm spring 9 are connected as a whole through the connecting piece 12 and screws. One side of the diaphragm spring of the actuator mover can be connected to any structure of the upper cover 11, the lower cover 3, and the outer cylinder 10 or the connecting surface between them, and installed by gluing or screws. By supplying currents of different frequencies and amplitudes to the coil assembly 7, the actuator mover can vibrate in the Z direction and generate inertial force in the Z direction.

[0032] Furthermore, the coil assembly 7 is laterally mounted on the inner wall of the outer cylinder 10 by screws. A through hole is opened in the middle of the coil assembly 7 for avoiding the connecting member 12. The outgoing wire of the coil assembly 7 is connected to the control board 4 through the opening of the coil assembly and the opening of the lower cover.

[0033] In this embodiment, the attached integrated active vibration absorber also needs to meet the following design requirements:

[0034] Stiffness design requirements: The first diaphragm spring 6 and the second diaphragm spring 9 need to be parameter designed to ensure the stiffness in three directions, requiring the stiffness in the Z direction to be as low as possible and the stiffness perpendicular to the Z direction to be as high as possible.

[0035] Gap design requirements: The gap between the magnetic cylinder 8 and the upper cover 11, the lower cover 3, and the coil assembly 7 in the Z direction must be greater than the stroke requirement of the actuator mover in the Z direction; the gap between the magnetic cylinder 8 and the upper cover 11, and the lower cover 3 must ensure that the strength of the first diaphragm spring 6 and the second diaphragm spring 9 is not destroyed under this gap.

[0036] In this embodiment, the attachment-type integrated active vibration absorber and the controlled structure can be connected in various ways. For example, the bottom surface of the base is mounted on the controlled structure by gluing or screwing; for another example, the outer cylinder 10 provides a mounting surface, which is mounted on the controlled structure by gluing or screwing to achieve vibration absorption in different directions relative to the controlled structure.

[0037] In this embodiment, if Figure 2As shown, the working mode of the attached integrated active vibration absorber is as follows: the acceleration sensor chip senses the acceleration information of the controlled structure in the Z direction. After the control board collects the acceleration information, it calculates the required vibration absorption force through the control algorithm, converts it into a coil current with a specific frequency and amplitude, and drives the actuator to generate vibration in the Z direction, which acts on the controlled structure, forming a closed-loop vibration absorption control of the controlled structure.

[0038] Based on the above embodiment, a specific example is provided for explanation.

[0039] like Figure 3 As shown, the attached integrated active vibration absorber includes: a base chassis 1, a base column section 2, a lower cover 3, a control board 4, an acceleration sensor chip 5, a first membrane spring 6, a coil assembly 7, a magnetic steel 8, a second membrane spring 9, an outer cylinder 10 and an upper cover 11. Among them, the base chassis 1 and the base column section 2 together form a base. The acceleration sensor chip 5 is welded on the control board, and the two form a unified whole and realize a conformal design with the base chassis 1 to maximize the use of the internal space. The lower cover 3, the outer cylinder 10 and the upper cover 11 together constitute the actuator housing; the first membrane spring 6, the coil assembly 7, the magnetic steel 8 and the second membrane spring 9 together constitute the actuator mover; the actuator mover is installed in the actuator housing to constitute the actuator; the lower cover 3 divides the attached integrated active vibration absorber into upper and lower parts, providing an installation interface for the upper actuator while also preventing the actuator from affecting the lower assembly during movement; the coil assembly 7 and the magnetic steel 8 serve as the excitation system of the attached integrated active vibration absorber, and the coil assembly 7 is fixedly installed on the outer cylinder 10 by screws; the magnetic steel 8 is a solid structure and is nested in the coil assembly 7. There is a certain gap between the coil assembly 7 and the magnetic steel 8, which can realize cyclic reciprocating motion under current drive.

[0040] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

[0041] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. An attached integrated active vibration absorber, characterized in that: include: A base, an actuator, a control board (4) and an acceleration sensor chip (5); wherein the actuator is mounted on the base; the control board (4) and the acceleration sensor chip (5) are mounted in the base; and the attached integrated active vibration absorber is mounted on the controlled structure through the base.

2. The attached integrated active vibration absorber according to claim 1, characterized in that: The base comprises: a base chassis (1) and a base column section (2); wherein the base column section (2) is mounted on the base chassis (1) by means of screws or gluing and is located inside the base.

3. The attached integrated active vibration absorber according to claim 2, characterized in that: The control panel (4) is connected to the base chassis (1) or the base column section (2) by means of screws or gluing.

4. The attached integrated active vibration absorber according to claim 1, characterized in that: The acceleration sensor chip (5) is mounted on the control board (4) by welding and is used to measure the longitudinal acceleration of the controlled structure; wherein f1>4f2, f1 represents the natural frequency of the acceleration sensor chip (5) after installation, and f2 represents the frequency of the controlled structure.

5. The attached integrated active vibration absorber according to claim 2, characterized in that: The actuator comprises: an actuator housing, a coil assembly (7) and an actuator mover; wherein the actuator housing is mounted on a base; and the coil assembly (7) and the actuator mover are arranged in the actuator housing.

6. The attached integrated active vibration absorber according to claim 5, characterized in that: The actuator housing comprises: a lower cover (3), an outer tube (10) and an upper cover (11); wherein one end of the outer tube (10) is connected to the lower cover (3), and the other end is connected to the upper cover (11); and the lower cover (3) is connected to the base column section (2).

7. The attached integrated active vibration absorber according to claim 6, characterized in that: The coil assembly (7) is laterally mounted on the inner wall of the outer cylinder (10) by means of screws.

8. The attached integrated active vibration absorber according to claim 5, characterized in that: The actuator mover comprises: a first diaphragm spring (6), a magnetic steel (8), a second diaphragm spring (9) and a connecting piece (12); wherein one end of the magnetic steel (8) is connected to the second diaphragm spring (9), and the other end is connected to the first diaphragm spring (6) via the connecting piece (12).

9. The attached integrated active vibration absorber according to claim 8, characterized in that: A through hole is provided in the middle of the coil assembly (7) for avoiding the connecting piece (12).

10. The attached integrated active vibration absorber according to claim 6, characterized in that: The output wire of the coil assembly (7) is connected to the control board (4) through the opening of the coil assembly and the opening of the lower cover; and the opening on the side of the base is used to install an external electrical connector.

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