Abstract:In this paper, a kind of variable step size active vibration control algorithm is proposed based on online secondary path modeling method. The variance rules of step size for active control filter and secondary path modeling filter are given in the proposed method. This paper also gives an auxiliary noise scheduling strategy to adjust the power of the auxiliary random noise. These variance rules are decided by the powers of the primary signal, residual signal and auxiliary noise. There is no need to set any experience parameters before the control system working. The convergence of the algorithm is improved, and simplifies the complexity of the algorithm. In the case of guarantee system stability, the auxiliary noise scheduling strategy can eliminate the influence of auxiliary noise on the residual noise as much as possible. Simulation results show that the proposed algorithm has performance in convergence and vibration control effect, comparing with previous algorithms. An active vibration control experiment on simply supported beam is made based on NI CRIO real-time controller. The results show that the vibration of the beam has been effectively attenuated, and the proposed method can track changes of the frequency of primary vibration. The results illustrate that good attenuation of structural vibration and the effectiveness of the proposed method is fully verified.
浦玉学,张 方,姜金辉. 变步长自适应结构振动主动控制算法[J]. 振动与冲击, 2015, 34(10): 199-205.
PU Yu-xue,ZHANG Fang,JIANG Jin-hui . A variable step size adaptive active structure vibration control algorithm. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(10): 199-205.
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