Method for actively inhibiting flexible vibration of sun sailboard

Abstract

The invention discloses a method for actively inhibiting the flexible vibration of a sun sailboard. According to the method, a stepping motor under sine and cosine subdivision drive is an executing mechanism, a satellite system dynamics model is established, after linear simplification is performed on the system dynamics model, the vibration frequency and the damping ratio of a system are calculated, an input former is designed to reshape an original sailboard rotating speed instruction, so that the system finishes sailboard rotating speed continuous drive and effectively inhibits the flexible vibration of the sailboard at the same time, and therefore influences on the load imaging quality by the flexible vibration of the sailboard are reduced. In addition, model parameter variation and design parameters do not have the strong robustness, compared with other sun sailboard flexible vibration control methods adopting piezoceramic materials, dampers and the like, adding of extra hardware devices is not needed, and engineering realization is simple.

Description

technical field [0001] The invention relates to a method for actively suppressing the flexural vibration of a solar panel, which belongs to the technical field of flexible spacecraft control, and is used for the flexural vibration suppression control during the rotation speed drive switching process of the solar panel, especially for low-frequency and very low-frequency flexures. Suppression of sexual vibrations. Background technique [0002] In order to track the sun to ensure energy supply, solar panels and their driving mechanisms are generally installed on satellites at present. However, due to the insufficient stiffness of the panels and the weak damping characteristics of the space environment, once the flexible vibration of the panels is excited, Difficult to decay quickly. In the past, due to the low resolution of optical or SAR (Synthetic Aperture Radar) payloads, the performance indicators such as satellite attitude pointing accuracy and stability were relatively ...

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Problems solved by technology

[0006] Document 4 "Michael J.Doherty, Robert J. Tolson. Input molding reduces structural vibration of solar panels [C]. NASA report, No: 19980232013" and Document 5 "Yuan Jinpeng, Liu Jiangong, Yang Lei. Bu A vibration suppression control strategy for motor-driven flexible loads [J]. Space Control Technology and Applications, 2008, 34(6): 34-38 "Although the load's flexibility factor is considered, the input molding technology is used to realize the The driving positioning and vibration suppression of flexible bodies, but in their research, the solar panel uses a stepping motor driven by chopper constant current, and the application background is limited to the positioning of the rotation angle of the flexible body. After the rotation angle is in place, the motor stops driving. This is different from the current engineering solar panels that use sine and cosine subdivisions to drive stepper motors and the actual working conditions that the panels need to be driven continuously to track the sun.

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