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Abstract: The conventional variable structure control technique for uncertain system requires that the uncertainty bound is known as a premise to assure robustness.The requirement creates an over-conservative controller and enlarges chattering.The propose
中文意思:
文摘:常规变结构控制用于不确定系统,须利用不确定性界确保系统的鲁棒性,控制器过于保守且抖振变大.本文把未知干扰和参数不确定性的影响等效为名义系统的外界干扰,利用时延技术对干扰进行在线估计,并将估计值引入到变结构控制中,从而抵消掉系统中的慢变不确定性,利用离散趋近律法,推出了准滑动模态的存在条件及其带宽.该方法克服了以往控制方法中须已知不确定性界的限制,且不必满足匹配条件,用较低的控制增益保证了系统的鲁棒性,降低了准滑动模态带即削弱了抖振.


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Abstract: The control reconfigurable aircraft with multi-surfaces needs robust basic flight control system to support enough time for failure detection and isolation.When partial surface loses,it can keep the damaged aircraft stable.In this paper,multivar 文摘:控制可重构飞机要求其基本飞行控制系统对舵面部分缺损故障具有强的鲁棒特性,在故障发生后保证飞机的稳定性,提供足够的时间进行故障的检测和隔离,为控制系统重构提供条件.本文采用高速采样PI控制器设计输出反馈跟随系统,给出了控制器的设计方法,并分析了它对于控制舵面部分缺损故障的鲁棒特性.仿真结果表明,这种控制器具有好的鲁棒特性.
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Abstract: The conventional variable structure control technique for uncertain system requires that the uncertainty bound is known as a premise to assure robustness.The requirement creates an over-conservative controller and enlarges chattering.The propose 文摘:常规变结构控制用于不确定系统,须利用不确定性界确保系统的鲁棒性,控制器过于保守且抖振变大.本文把未知干扰和参数不确定性的影响等效为名义系统的外界干扰,利用时延技术对干扰进行在线估计,并将估计值引入到变结构控制中,从而抵消掉系统中的慢变不确定性,利用离散趋近律法,推出了准滑动模态的存在条件及其带宽.该方法克服了以往控制方法中须已知不确定性界的限制,且不必满足匹配条件,用较低的控制增益保证了系统的鲁棒性,降低了准滑动模态带即削弱了抖振.
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