Solar cell array vibration suppression system and method based on parallel mechanism

Abstract

The invention provides a solar cell array vibration suppression system and method based on a parallel mechanism. The system comprises the Stewart parallel mechanism located between a satellite body and a flexible solar cell array drive mechanism. A six-branch-rod three-freedom-degree Stewart parallel mechanism based on a voice coil type actuator is adopted as the Stewart parallel mechanism, and full-spectrum-band vibration suppression is achieved through active and passive combination. The lower end of the Stewart parallel mechanism is fixedly connected with the satellite body, and the upper end of the Stewart parallel mechanism is fixedly connected with the flexible solar cell array drive mechanism. In order to avoid the influence of solar cell array flexural vibration on whole-spacecraftultra-static ultra-stable control, a control scheme that the active and passive control integrated three-freedom-degree parallel mechanism is adopted for achieving solar cell array high-low-frequencyflexural vibration suppression is proposed.

Description

technical field [0001] The invention belongs to the research field of the design and research of the vibration isolation and suppression system of a spacecraft, and relates to the design of a vibration suppression system for a solar battery array of a flexible spacecraft, in particular to a large-scale flexible Design technology of vibration suppression system scheme for solar array spacecraft. Background technique [0002] With the continuous development of space activities such as high-resolution optical payloads, deep space telescopes, and interstellar laser communications, the requirements for pointing accuracy and attitude stability of the spacecraft body are getting higher and higher. For example, the new generation of space telescope JWST requires pointing accuracy up to 0.01×10 -6 rad. As one of the micro-vibration sources of the spacecraft, the solar cell array drive mechanism will generate a frequency-rich disturbance moment during normal operation, which will co...

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Problems solved by technology

However, the stiffness isolator can only suppress micro-vibrations in a limited frequency band, and has limited suppression effects on low-frequency vibrations and random disturbances of white noise, which cannot meet stringent performance requirements.

At the same time, the active vibration effect is not ideal. It only has a damping effect on a certain bandwidth or certain frequencies. In a high bandwidth, it is quite different from the expected vibration isolation index, and the orientation accuracy is not high.

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