Active control method and device for space sail board structure low modal vibration based on form sensing

Abstract

A method for actively controlling low mode vibration of space board-sail structure based on form-sending includes carrying out real time sense on vibration form of board-sail structure by optical fiber grating sensing network, generating control policy according to sensed vibration information of said structure, driving form memory alloy spring by using control driving unit to generate control action and utilizing form memory effect and super-elastic effect of said spring to realize purpose of eliminating structure vibration response. The device used for realizing said method is also disclosed.

Description

technical field [0001] The invention relates to a method and device for active control of low-mode vibration of a space sailboard structure, and in particular to a method and device for active control of low-mode vibration of a space sailboard structure based on the perception of structural vibration shape information. Background technique [0002] Due to space flexible structures such as solar panels and large satellite antennas, it is necessary to maintain high operating accuracy during long-term operation, and usually have extremely strict requirements on the vibration environment, and such structures generally have low stiffness, small damping, and low natural frequency and modal-intensive features, and the space environment has no external resistance, so it is very susceptible to vibration due to disturbance, and makes it difficult for most conventional vibration monitoring and control methods to meet the technical requirements. For example, when a spacecraft is operati...

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Problems solved by technology

[0003] In the prior art, the research and application of the piezoelectric material PZT / PVDF can be considered as the most representative achievement among the driving materials used for the active control of the vibration of the space sailboard structure. When used as a driver, it has the characteristics of low power consumption, electrical operation, frequency bandwidth and force generated internally, so it is very suitable for the needs of aerospace structure monitoring and control, but the deficiency of piezoelectric materials is that the output torque is not large enough when used as a driver , so it can achieve good results in controlling high-frequency vibrations, but the control effect is not very obvious for structures with low-mode and large-amplitude vibration responses

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