An Analogue Compensation Scheme in Adaptive Active Control System with Significant Secondary Path Variation

Online secondary path modeling is used to deal with varying secondary path in active control systems. However, instability may happen when there is fast "significant" changing due to the tracking speed limitation of online secondary path modeling. In this paper a scheme involving analogue compensator is proposed to be used in the secondary path with fast "significant" changing. The function of the analogue compensator is analyzed and the guideline for design is given. Simulations have been carried out to compare the performance of the proposed scheme and the existing online secondary path modeling approach. The result shows that the proposed scheme is more effective for fast "significant" secondary path variation.