窄带主动噪声控制中频率不匹配应对方法实时仿真

非声学传感器的使用致使前馈窄带主动噪声控制(ANC)系统中往往存在频率不匹配(FM)。利用MATLAB/Simulink实时仿真功能,构建了针对前馈窄带ANC系统中FM应对方法的实时仿真平台。对一种改进的FM应对方法进行了深入的实时仿真研究,与传统的FM应对方法进行了比较,对其性能进行评估。仿真结果与分析表明,与传统FM应对方法相比,新方法能够应对较大的非平稳FM量,且具有较快的收敛速度。

Real-time Simulation for Methods of Accommodating Frequency Mismatch in Narrowband Active Noise Control

Frequency mismatch (FM) generally presents in feedforward narrowband active noise control (ANC) system due to the application of non-acoustic sensor. Based on the real-time simulation function of MATLAB/Simulink, this paper constructs a real-time simulation platform for methods of accommodating FM in feedforward narrowband ANC system. A new proposed FM accommodating method is illustrated and studied through real-time simulations in deep, and also its performance is evaluated by comparing with the traditional FM accommodating approach. Simulations results shows that the new system can cope with larger nonstationary FM with faster convergence rate in compare with the traditional system.