基于位移反馈控制的主动增加时滞补偿方法及其试验验证

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (6) : 185-191.

论文

基于位移反馈控制的主动增加时滞补偿方法及其试验验证

刘军龙1,2;代晶辉1;张春巍3;李芦钰4;欧进萍3,4;郝磊2

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Experiment of Time Delay Compensation Method Based on Displacement Feedback and Active Increasing Time Delays

LIU Jun-long1,2, DAI Jing-hui1; ZHANG Chun-wei3;LI Lu-yu4，OU Jin-ping 3,4;HAO Lei2

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摘要

时滞是结构振动主动控制系统中普遍存在的现象，时滞不仅会降低控制系统的性能，严重时会造成系统失稳、控制发散。针对此问题，本文研究以下三方面内容：首先基于单自由度系统时滞的稳定性理论分析，确定系统最大允许时滞量的解析解，该阈值可以作为确定何时应用时滞补偿技术的一个评判指标；其次，当作动器实际时滞量大于最大允许时滞量时，常规时滞补偿方法将会失效，提出了基于位移反馈的主动增加时滞的补偿新方法，并定性结合定量详细分析了主动控制算法的参数影响规律；最后，以单层剪切型框架结构为被控对象，进行了多种输入激励下基于位移反馈的主动增加时滞补偿试验验证。大量仿真分析和试验结果表明本文所提方法能够在保证系统稳定性的同时获得一定可观的控制效果

Abstract

Time delay is a more general phenomenon in the structure vibration control. Time delay may not only degrade the performance of the control system but also induce instability to the system. In the view of this practical problem, the objectives of the present study are divided into three parts. The first part presents the stability analysis of a SDOF system with time delayed feedback. The purpose is to find a analytic solution for the maximum allowable time delay. This value can be used as a criterion for deciding the need of time delay compensation as significant degradation in the control performance occurs only when the time delay in the system is close to this value. The second part presents a technique for compensation of time delay-active increasing time delay compensation when actual time delays larger than the maximum allowable time delay. At last, the experimental study of based on displacement feedback active increasing time delays compensation is conducted. The numerical simulation and experimental results demonstrated that the presented time delay compensation control algorithm is effective in reducing the maximum response of the systems and the system stability can be guaranteed

导出引用

刘军龙;代晶辉;张春巍;李芦钰;欧进萍;郝磊 . 基于位移反馈控制的主动增加时滞补偿方法及其试验验证[J]. 振动与冲击, 2011, 30(6): 185-191

LIU Jun-long;DAI Jing-hui;ZHANG Chun-wei;LI Lu-yu;OU Jin-ping;HAO Lei . Experiment of Time Delay Compensation Method Based on Displacement Feedback and Active Increasing Time Delays[J]. Journal of Vibration and Shock, 2011, 30(6): 185-191