结构自适应频谱塑形主动控制研究

Aiming at the demand of targeted vibration control for complex mechanical systems, a generalized adaptive active vibration spectral reshaping control method, which is able to control amplitude and phase of every single frequency components and to inject arbitrary frequency components, is proposed. Firstly, a digital twin model (DTM) of the controller is introduced to the traditional structure of filtering adaptive control. The coefficients of the DTM are online updated according to adaptive algorithm while the original controller copies the coefficients of DTM at every iteration, which improves the convergence of the control system. Second, a design method for generalized shaping filter is proposed, overcoming the weakness of the traditional algorithm which has no phase control and frequency injection capability. External multi-frequency signal and the estimated primary noise are applied to construct the shaping filter with amplitude, phase and frequency control capability. The proposed algorithm is able to realize modes of cancellation, suppression, hold, enhancement and injection. Time domain convergence analysis of the proposed algorithm is conduct and the results are in good agreement with the numerical simulations. Experimental study has been conducted to verify the effectiveness and superiority of the proposed algorithm.