块处理的变步长自适应振动主动控制方法  

Variable step adaptive vibration active control method based on block processing

作　　者：徐世宇 何其伟 XU Shiyu;HE Qiwei(College of Power Engineering,Naval University of Engineering,Wuhan 430033,China;College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033 [2]海军工程大学舰船与海洋学院,湖北武汉430033

出　　处：《舰船科学技术》2023年第12期40-46,共7页Ship Science and Technology

摘　　要：针对振动主动控制次级通道的时变特点和在线辨识次级通道算法中各通道相互影响,导致控制效果不佳的问题,提出一种基于块处理的变步长自适应振动主动控制方法。根据参考信号和期望信号的功率变化对次级通道辨识和振动控制进行块处理的在线调整步长,排除异常信号干扰,进一步提高辨识精度与速度。仿真结果表明,与原算法比较,该算法的辨识速度和精度均能提升近10%,系统在控制环境突变下能提前近一半时间完成收敛。以单层隔振平台为控制对象对本算法进行实验研究,结果表明,该算法对单层隔振平台的振动响应有较好的控制效果,验证了该算法在实际控制中的有效性。In order to solve the problem of poor control effect caused by the interaction between secondary channel and control channel in active vibration control,an active vibration control method with variable step secondary channel online identification based on block processing is proposed.The variable step size for block processing of secondary channel identification and vibration control is improved according to the power changes of reference signal and expected signal.The step size is adjusted on-line to accelerate the convergence speed of algorithm,improve the identification accuracy and enhance the system stability.The simulation results show that,compared with the original algorithm,the algorithm has faster identification speed,higher accuracy and better system stability.The algorithm is experimentally studied with single-layer vibration isolation platform as control object.The results show that the algorithm has better control effect on vibration response of single-layer vibration isolation platform,and the effectiveness of the algorithm in actual control is verified.

关 键 词：振动主动控制 次级通道在线辨识 滤波型最小均方算法 变步长 

分 类 号：U661.44[交通运输工程—船舶及航道工程] O328[交通运输工程—船舶与海洋工程]