基于X滤波最小均方算法的冲击振动自适应逆控制

Adaptive Inverse Control of Shock Vibration Based on Filter-X Least Mean Square Algorithm

针对冲击振动控制的自身特点及已有算法的缺陷,提出了冲击振动的自适应逆控制方法.该方法能够根据不同的负载特性自适应地调节逆控制器参数,在时域实现了冲击振动控制,完全克服了频域方法中低频分辨率低、易产生溢出的问题.同时,针对X滤波最小均方(LMS)算法运算量大、收敛速度慢的缺点,提出了一种快速X滤波LMS算法,运用批处理技术,使码元间的平均计算量减小.试验表明,该方法使控制精度提高了约50%,明显优于已有的控制方法.

After analyzing the characteristics of shock vibration control and the limitation of existed algorithm, a method of shock vibration control based on adaptive inverse control was proposed. The method could adjust the parameter of the controller according to different loads, realize vibration control in time domain and solve the problems of overflow and low resolution at low frequencies appeared in the frequency domain method. To decrease the computation complexity and convergence time of the filter-X least mean square (LMS) algorithm, a fast filter-X LMS algorithm which reduced the averaging computational complexity by using of block process technique was provided. Practical testing shows that the control accuracy is increased about 50% and the performance is improved.