摘要
针对自适应前馈控制算法在主动隔振系统中存在的局限性,提出了一种基于迭代反馈调整(IFT)的主动隔振控制策略。该方法以主动隔振后的残余力均方值为目标函数,依托系统模型,根据实际需求设计控制器阶数,并通过信赖域的优化方法对控制器参数进行迭代调整,以获得期望的固定阶数的低阶控制器。该低阶控制器有利于降低成本和减少设计计算量,便于控制算法的实时实现。以基于磁致伸缩作动器的双层隔振系统为研究对象,用Matlab仿真软件对提出的算法进行仿真研究,并与自适应前馈控制算法中常用的归一化FX-LMS算法进行比较。结果表明,基于IFT方法所设计的低阶控制器比归一化的FXLMS算法具有更好的隔振效果,有着很好的实用性和推广性。
In view of the limitations of the feedforward adaptive control method for active vibration isolation system, a method based on iterative feedback tuning is proposed. This method takes the mean square value of residual force as target function, and designs the con- troller order based on system model and actual demand. The trust region method is used for the controller parameters adjustment. Final- ly, a fixed lower order controller is obtained. The low order controllers can reduce costs and the design calculation, which is convenient for the real-time control algorithm to come true. Taken the active vibration isolation system based on magnetostrictive actuator as the re- search object, the algorithm is simulated by the Matlab and compared with the Normal FXLMS algorithm. The results show that the low order controllers based on the IFT methods have better vibration isolation effect than the Normal FXLMS algorithm. And the methods hare good practicability and extensibility.
出处
《控制工程》
CSCD
北大核心
2012年第2期324-327,共4页
Control Engineering of China
基金
国家高技术研究发展计划(863计划)课题基金资助项目(2007AA05Z232
2007AA05Z432926)
关键词
主动隔振
IFT方法
信赖域法
低阶控制器
active vibration isolation
iterative feedback tuning method
trust-region method
low order controller
