摘要研究了通过次级通道阻尼补偿提高滤波x-最小均方(Least Mean Square; LMS)算法性能的实现方法，提出了一种自适应前馈等效阻尼补偿方案；将前馈补偿器与自适应前馈控制器设计相结合，设计了基于前馈等效阻尼补偿的改进滤波x-LMS算法，改进算法保持了滤波x-LMS算法结构简单、鲁棒性强等优点。以柔性悬臂梁前两阶模态振动为控制目标，分别采用两种算法进行了主动减振仿真实验，结果表明本文提出的改进滤波x-LMS算法具有更快的收敛速度。
Abstract： Feedforward damping compensation method, a realization of damping compensation of secondary path, is studied, and it can be used to improve the performance of filtered x-LMS algorithm. Then, by combining the feedforward compensator and the adaptive feedforward controller, an improved filtered x-LMS algorithm based on feedforward damping compensation is designed. The improved algorithm still holds the virtues of filtered x-LMS algorithm, such as simple structure, excellent robustness, etc. A simulation of active control on a flexible cantilever’s first two modal vibration is carried out, in which standard and improved filtered x-LMS algorithm are respectively used. Simulation results show that the improved algorithm is capable of suppressing the first two modal vibration of cantilever in far less time than standard one.
2009, Vol. 28 
