声振主动控制系统中误差通道的在线辨识问题

声振主动控制系统中误差通道的存在是影响系统稳定性和控制效果的关键因素,它直接影响控制系统的收敛性和控制的有效性.在系统参数慢时变或近似不变的情况下,对误差通道离线辨识能大大简化控制算法.然而在很多实际的声振控制系统中,被控系统特性和参数经常是时变的,误差通道的在线辨识便成为主动控制研究中的关键所在.在线辨识算法有很多,结合在线辨识功能的自适应控制种类就更多.通过对声振主动控制领域中的已有的误差通道在线辨识技术进行分析与比较,指出其各自的优缺点,并提出其中值得研究的若干问题,以期有助于今后的进一步深入研究.

Problems on Online Secondary Path Modeling in Active Noise and Vibration Control System

The secondary path is the key factor of influencing the stability and control effect of active noise and vibration control system, which directly influences the convergence and effectiveness of the control system. In the case of system parameters varying slowly or nearly not varying, offline modeling of the secondary path can simplify the control algorithm greatly. But in some practical systems, the system characteristics are time varying. So online modeling of the secondary path is important in such cases. There are many online modeling approaches, and more active control strategies integrated with online modeling of secondary path have been proposed. In this paper, the focus is directed on the analysis and comparisons of existing online modeling approaches of the secondary path, and then some problems are presented.