摘要
从有源噪声控制的原理出发,结合车内噪声的特点,制定了以前馈数字式自适应控制器为核心,发动机和车身的振动加速度为输入,次级声源为输出,残余噪声信号为反馈的闭环有源噪声控制技术方案。采用了非声信号作为参考信号来解决次级声反馈问题,在次级通路建模上,引入了自适应在线附加随机噪声Zhang法,采用归一化FLMS算法建立自适应滤波器。在MATLAB/Simulink下建立了车内噪声有源控制的模型,并通过仿真论证了方案的可行性。
According to the theory of ANC （ Active Noise Control） and the characteristics of automobile cabin noise, and also taking the feed-forward digital self-adaptive controller as the core, the vibrating accelerations of engine and car body as inputs, the second loudhailer as output and the residual noise signals as feed-back, a closed-loop ANC technical program had been established. Non-acoustic signals were used as reference inputs to solve the problem of second acoustic wave＇s feed-back in ANC. A self-adaptive online identification with auxiliary noise called Zhang＇s method was used on secondary path modeling. The Normalized FLMS algorithm was adopted in self-adaptive filters to ensure the stability and convergence speed of the system. In MATLAB/Simulink, an ANC model of car＇ s interior noise control was established and its feasibility has been discussed through the simulation results.
出处
《机械设计与研究》
CSCD
北大核心
2009年第4期62-66,72,共6页
Machine Design And Research
关键词
自适应
有源控制
仿真研究
self-adaptive
active control
simulation study
