비공진 주파수로 가진 되는 구조물의 능동 진동 제어를 위한다중 입력 다중 출력 fxLMS 알고리듬

Abstract

In this study, we proposed the modular filtered-x least means square(fxLMS) algorithm to easily apply the multi-input multi-output (MIMO) fxLMS to the vibration control. If the number of input and output channels are increased, the weight matrix of the fxLMS control needs to be re-defined. However, the modular fxLMS algorithm proposed in this study can work like a function so that the complex fxLMS algorithm can be easily implemented simply by adding additional modular fxLMS blocks. It is proved mathematically that the modular fxLMS algorithm proposed in this study is the same as the original fxLMS algorithm. To validate the proposed method, the vibration control of a shell structure excited by the internal harmonic disturbance was carried out experimentally. The shell structure is equipped with a single-reference accelerometer, four error accelerometers, and four voice-coil type actuators. The fully coupled MIMO fxLMS algorithm was implemented by the modular fxLMS algorithm and the Simulink. It is proved experimentally that the vibration of the shell structure can be effectively suppressed by the proposed method.