Device for inhibiting vibration of space large annular trusswork and control method

A ring truss and structural vibration technology, applied in the field of spacecraft structure, can solve the problems of low robustness of the control system, neglect of high-order modes of the structure, poor anti-interference ability, etc., and achieve low energy consumption, simple structure, and high reliability Effect

CN109353546AActive Publication Date: 2019-02-19NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-02-19

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Abstract

The invention discloses a device for inhibiting vibration of a space large annular trusswork, and belongs to the technical field of spacecraft structures. The device comprises a spacecraft, an unfolding arm is connected with the spacecraft, and an executing mechanism is arranged on the unfolding arm; the annular trusswork is connected with the tail end of the unfolding arm, and a cable net reflecting face is arranged on the annular trusswork; the executing mechanism is also connected with one end of the annular trusswork through a pull cord; a control module is also connected with the executing mechanism. The invention further discloses a control method thereof. The control method is based on a tension force feedback principle, a motor takes induction currents as feedback, wherein the induction currents are generated when a motor rotor rotates and cuts magnetic lines, no other sensor data is needed to serve as feedback, no known system models are needed, and the device is easy to control, can still effectively inhibit vibration of the space large annular trusswork when the state of the system changes, and has good robustness.
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Description

technical field

[0001] The invention belongs to the technical field of spacecraft structures, and in particular relates to a device and a control method for suppressing the structural vibration of a space large ring truss antenna by using a motor and a pull wire. Background technique

[0002] The large-scale ring truss structure in space can have a diameter of more than 10 meters after unfolding and locking, and has the characteristics of large spatial scale, small damping, low vibration frequency, and dense modes. Once the large ring truss structure in the space is disturbed, it is easy to excite low-frequency vibrations. In addition, there is no air damping. Once the vibration occurs, it is difficult to attenuate in a short time, which will affect the normal operation of the antenna. Using guy wires as a means of injecting damping provides excellent vibration dampening without adding weight, system configuration and reliability.

[0003] André Preumont and Frédéric Bossen...

Examples

Embodiment Construction

[0032] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be pointed out that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0033] Such as figure 1 as shown, figure 1 It is a structural schematic diagram of a device for suppressing the vibration of a large space ring truss structure according to the present invention, the device includes a cable net reflector 2, a ring truss structure 1, a spacecraft 5, a deployment arm 3, an actuator 4, a control module and a pull wire 6; The actuator 4 includes a motor reel 41 , a motor 42 and a motor driver 43 ; one end of the pull wire 6 is wound on the motor reel 41 , and the other end is connected to the ring truss structure 1 . The motor 42 has the functions of tens...