基于Stewart平台的星上微振动主动隔离/抑制

李伟鹏; 黄海; 黄舟

doi:10.13433/j.cnki.1003-8728.2015.0428

基于Stewart平台的星上微振动主动隔离/抑制

doi: 10.13433/j.cnki.1003-8728.2015.0428

1.
北京航空航天大学宇航学院, 北京 100191

基金项目:

国家自然科学基金项目（11302010）与中国空间技术研究院CAST基金项目（CAST201204）资助

详细信息

作者简介:
李伟鹏（1980-），讲师，博士，研究方向为航天器振动主动控制技术，liweipeng@buaa.edu.cn

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- 文章访问数: 152
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- 被引次数: 0
出版历程
- 收稿日期: 2013-07-18
- 刊出日期: 2015-04-05

Active Isolation/Suppression for Satellite Micro-vibration with Stewart Platform

1.
School of Aastronautics, Beihang University, Beijing 100191

摘要

摘要: 针对星上微振动主动隔离/抑制的要求，以VCM（voice coil motor）作动器Stewart平台为控制装置，通过对其动力学模型解耦将控制转化为SISO（single input single output）问题；分析了Skyhook控制方法的隔振效果及其对抑振的局限性，在控制系统中加入了PFF（positive force feedback）控制回路，并引入加速度反馈环节以提高系统的鲁棒稳定性，形成一种振动主动隔离/抑制控制方法；利用Stewart平台的单杆开展了基础扫频激励和负载单频直接干扰共同作用下的S-DOF（single degree of freedom）微振动主动隔离/抑振控制实验，建立了Stewart平台刚/柔混合动力学模型并通过仿真研究了6-DOF振动主动隔离/抑振控制效果。实验和仿真结果表明：该方法可实现良好的振动主动隔离/抑制效果且性能稳定。
- Stewart平台 /
- 微振动 /
- 主动控制 /
- 振动隔离 /
- 振动抑制
Abstract: A Stewart platform actuated by VCM (voice coil motors) is selected as the control device to realize active isolation/suppression for micro-vibration onboard a satellite. A SISO (single input single output) control strategy is established for the Stewart platform by decoupling its dynamic model to the single strut model. The effectiveness of the vibration isolation as well as the limitation on vibration suppression of the Skyhook control method is analyzed, then a PFF (positive force feedback) loop is implemented to achieve isolation. To enhance the robust stability properties of the control system, an acceleration feedback loop is added to the system. Finally, micro-vibration active isolation/suppression experiments and simulations are conducted on the Stewart platform's single strut, as well as Stewart platform rigid-flexible coupling dynamic model. Base sweep excitations and payload single-tone disturbances are induced on both objects, and isolation/suppression is conducted with this paper's control method. The experimental and simulation results show that the control performance is quite good and stable with respect to both vibration isolation and suppression.
- acceleration /
- active control /
- computer simulation /
- computer software /
- control

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参考文献(25)

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