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大型空间可展开天线展开过程组合控制研究

Zhongguo Jixie Gongcheng/China Mechanical Engineering(2009)

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Abstract
针对大型空间可展开天线展开过程控制问题,基于奇异摄动理论将天线系统分解为慢变、快变两个子系统,提出一种将非线性PID控制和H∞鲁棒控制相结合的组合控制方法。慢变子系统采用非线性PID控制来控制刚性运动跟踪期望轨迹,快变子系统采用H∞控制抑制弹性振动,从而保证刚性、柔性状态输出同时达到要求。仿真结果表明:采用该方法可使弹性变形对本体运动的影响减小,在天线较好地跟踪期望轨迹展开的同时,有效地抑制了弹性振动,显著改善了系统的跟踪性能和稳定性能。
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Key words
space deployable antenna,singular perturbation,combined control,elastic vabiration,non-linear PID control,H∞ control
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