压电复合材料层合梁非线性模糊滤波振动控制  

Active Control of Piezoelectric Composite Beam Vibration Using a Nonlinear Fuzzy Filter

作　　者：屈文忠[1] 孙进才[1] 常新龙[2] 

机构地区：[1]西北工业大学,西安710072 [2]西安二炮工程学院,西安710025

出　　处：《应用力学学报》2001年第z1期80-84,共5页Chinese Journal of Applied Mechanics

基　　金：中国博士后科学基金资助

摘　　要：在振动主动前馈控制中通常采用的自适应滤波 XLMS算法只限定于线性主动控制问题。由于在振动主动控制中各种非线性因素的存在 ,使得非线性控制方法成为必需。本文利用模糊逻辑系统能够逼近任何非线性系统的特性 ,提出了一种非线性模糊滤波振动控制方法 ,解决了由于传感通道的非线性使得参考信号与外扰间呈非线性函数关系的主动控制问题。针对具有压电作动器的复合材料层合梁进行了振动主动控制的数值仿真计算 ,结果表明该非线性模糊自适应控制方法优于线性滤波 XLMS方法。Active control of vibration has been the subject of a lot of research in recent years. However, the popular filtered-X LMS algorithm is limited to linear control problems using feedforward control techniques. A fuzzy logic system based control structure and adaptive algorithm suitable for driving nonlinear feedforward control systems is presented in this paper. This nonlinear adaptive filter is capable of suppressing a primary disturbance, which is a nonlinear function of the reference signal fed to the filter. The simulation results for the nonlinear active control of piezoelectric composite beam vibration show that this nonlinear fuzzy adaptive control method performs better than linear filtered X LMS method for a nonlinear control problem.

关 键 词：压电作动器 复合材料梁 振动主动控制 非线性模糊滤波 自适应模糊控制 

分 类 号：O32[理学—一般力学与力学基础]