摘要
对日益大型化、复杂化的隔振系统进行主动控制,采用多误差的最小均方差算法(LMS)计算负荷较大,且算法的实现过程复杂。基于此,研究了基于FXLMS算法的多通道解耦控制算法,建立简单的自适应控制器,可独立的控制子系统作动器,误差传感器测得的误差信号只参与该子系统对应作动器的控制力的调节,使所有误差传感器的误差信号的平方和最小,实现对多自由度振动的主动控制。仿真和试验结果表明,通过调整收敛系数和控制代价加权因子,主动隔振系统采用简单易行的解耦算法对线谱振动进行控制是行之有效的。
At present,vibration isolation systems become larger and more complicated. When the multi-error LMS algorithm is used in such systems,the computational complexity increases and it is more difficult for the algorithm to be implemented. Here,the decoupled multi-channel active control algorithm based on FXLMS algorithm was studied and simple adaptive controllers driving independently the actuators of each sub-system were designed. The outputs of error sensors of the relevant subsystem only joined to adjust the control force of the corresponding actuators. When the sum of squared outputs of all the error sensors was minimized,the active control for vibration of a multi-DOF system would be realized. The simulation and test results showed that the decoupled control algorithm used in an active vibration isolation system is simple and effective by adjusting the convergence coefficients and control effort weighted factors.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第19期192-196,共5页
Journal of Vibration and Shock
关键词
主动隔振
FXLMS算法
解耦算法
仿真与试验
active vibration isolation
FXLMS algorithm
decoupled algorithm
simulation and test
