Time‐delayed position feedback control for a unique active vibration isolator
Time‐delayed position feedback control for a unique active vibration isolator
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DOI：
10.1002/stc.460
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发表时间：
2012-10
影响因子：
5.4
通讯作者：
Gianmarc Coppola;Kefu Liu
中科院分区：
文献类型：
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作者：
Gianmarc Coppola;Kefu Liu
这项工作研究了一种独特的主动隔振器的特性控制的时间延迟的位置反馈技术。所研究的系统具有明显的时间延迟所造成的致动器的动态。首先，考虑直接绝对位置和相对位置反馈。该研究揭示了消极的位置反馈和积极的位置反馈之间的几个主要区别。其次，对时滞位置反馈进行了稳定性分析。研究了两种不同的反馈，即延迟负位置反馈和延迟正位置反馈。确定了稳定性图，并给出了闭环系统的各种根轨迹。第三，提出了一种最优控制器的设计方法。进行数值优化，以找到一个最佳的控制器为每个所考虑的控制情况。最后，进行了实验研究，以验证分析和数值结果，并证明了最优控制器的有效性。版权所有© 2011约翰威利父子有限公司.
This work examines the characteristics of a unique active vibration isolator controlled by a time‐delayed position feedback technique. The system under study possesses an appreciable time delay caused by the actuator dynamics. Firstly, direct absolute position and relative position feedbacks are considered. The study reveals several main differences between a negative position feedback and a positive position feedback. Secondly, stability analysis of the delayed position feedback is carried out. Two different feedbacks are studied, namely the delayed negative and delayed positive position feedbacks. The stability chart is determined, and various root loci of the closed‐loop systems are presented. Thirdly, an optimum controller design methodology is presented. A numerical optimization is conducted to find an optimum controller for each of the considered control cases. Lastly, an experimental study is conducted to validate the analytical and numerical results and demonstrate the effectiveness of the optimum controllers. Copyright © 2011 John Wiley & Sons, Ltd.