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

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.

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...

AI Technical Summary

Problems solved by technology

However, in the research on the vibration control method of the existing space large-scale ring truss antenna structure, the high-order modes of the structure are ignored, the anti-interference ability is poor, the additional mass is large, the robustness of the control system is not high, and the structural dynamics and dynamics of the structure must be known in advance. Disadvantages of control system models, etc.

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