基于移相法的结构主动控制时滞补偿效果分析  

ANALYSIS ON TIME-DELAY COMPENSATION OF ACTIVE CONTROL SYSTEMS BASED ON PHASE SHIFT METHOD

作　　者：李建强[1] 王修勇[1] 孙洪鑫[1] 陈茂生[1] 

机构地区：[1]湖南科技大学土木工程学院,湘潭411201

出　　处：《动力学与控制学报》2016年第1期80-85,共6页Journal of Dynamics and Control

基　　金：国家重点基础研究发展计划(973计划)项目(2015CB057702);国家自然科学基金资助项目(51378203);湖南省研究生科研创新项目(CX2015B496)~~

摘　　要：结构控制中由于信号传输及作动器机电转换必然引起时滞,对控制效果产生不利影响.本文提出了结构主动控制移相法时滞补偿策略,以单自由度结构为算例,分析了时滞大小、采样间隔、主动控制中权矩阵取值、结构阻尼比以及速度与位移不同时滞等情况下移相法的补偿效果.结果表明,移相法对结构时滞情况具有很好的补偿效果,时滞大小、权矩阵取值和速度与位移不同时滞时,会影响移相法对结构时滞补偿效果;但采样间隔,结构阻尼比不会影响移相法对结构时滞补偿效果.The signal transmission and electromechanical conversion of actuator cause time delay of structural control. Definitely,it adversely affects the control performance. In this paper,a phase shift algorithm for the time-delay of active structural system was proposed. The random earthquake response of structures with single degree of freedom subjected to E1 Centro was studied. The compensation effect of time-delay size,sampling interval,active control weighting matrix values,structural damping ratio,delays of different speed and displacement were analyzed based on the phase shift method. The results showed that the phase shift method is absolutely effective. Time-delay size,active control weighting matrix values and the delays of different speed and displacement affect the compensation effect,but the sampling interval and structural damping ratio make little influence on the compensation effect.

关 键 词：主动控制 时滞 时滞补偿 移相法 

分 类 号：O328[理学—一般力学与力学基础]