摘要
采用精细积分方法计算了时滞受控系统在地震作用下的动力响应,得到在不同反馈增益下随时滞量变化的系统地震响应峰值分布。分析了在小时滞范围内随时滞量变化和反馈增益在不同的取值下对系统响应的影响,结果表明时滞对系统控制效果的影响程度随反馈增益的增大而增大,当时滞较大时,采用较小的控制增益控制效果较好,当时滞较小时,采用较大的控制增益可以获得更好的控制效果。该结果可用于设计考虑时滞影响的结构振动主动控制算法。
A kind of dynamic equation of control system with double time delays was solved by a modified precise integration method. The accuracy of the method was proved by numerical examples in which time histories of system response and the distribution of response peaks of the system with variational time delays were calculated when feedback control gains take different values. The influences of different values of time delays and feedback control gains on the distribution of stable areas of the system were investigated. The influences of different feedback gains and variational time delays on system response were analysed, which shows that the influence of time delays gets more distinct as feedback gains increase. The result is of certain guiding significance for designing active structural vibration control algorithm considering the influence of time delay.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第6期181-184,共4页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(10772141
11172226)
关键词
精细积分
时滞
主动控制
控制增益
precise integration method
time delay
active control
control gain
