Dynamic characteristics of a coupling feedback vibration control system with time delay

被引：0
|
作者：
Liu S. [1 ]
Wei X. [2 ]
Fang X. [1 ]
Wang J. [1 ]
Su P. [1 ]
机构：
[1] College of Power Engineering, Naval University of Engineering, Wuhan
[2] No.91404 Troops of PLA, Qinhuangdao
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2017年 / 36卷 / 18期
关键词：
Coupling control; Delay compensation; Feedback delay; Vibration system;
D O I：
10.13465/j.cnki.jvs.2017.18.026
中图分类号：
学科分类号：
摘要：
A double stages coupling feedback digital vibration control system model was presented to analyze the dynamic characteristics of the corresponding system with time delay. The coupling relation between actuators was described through the signal transmit block diagram. With the model, the disadvantages of the traditional method were overcome and the reaction forces on the foundation were eliminated. A discrete domain equation for the force transmissibility under coupling feedback control was derived. The step responses of the system with different sampling time, damping and feedback type were calculated. The results show that the response of the digital control system can approach to that of the corresponding continuous system, when the time delay is smaller. But with a longer delay time, the corresponding poles will lie at the outside of the unit circle and the system becomes unstable. A lead compensator was designed to improve the control effect. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：177 / 183
页数：6
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