主动噪声抵消中初级传感器到次级声源间系统函数的辨识

提出了一种应用于主动噪声抵消系统中求解初级传感器到次级声源之间系统函数的辨识算法，简称ＰＳＩ，算法以频域最小二乘系统辨识算法为核心，首先根据实测数据用ＩＦＬＳ算法辨识出初级传感器到误差传感器之间的系统函数Ｈ，再根据实测数据用ＩＦＬＳ算法辨识出次级声源到误差传感器之间的系统函数Ｈ２，然后用模拟激励方法通过白噪声间接激发初级传感器到次级声源之间的各种模态；再次利用ＩＦＬＳ算法辨识初级传感器到次级声源之

Identification of system functions from primary sensor to secondary source in active noise control system

This paper delivers a system identification algorithm for finding the system function form primary sensor to secondary source in active noise control system, PSI in short. Based on the frequency domain least squares system identification algorithm (IFLS),the algorithm identifies the transfer function H of primary sensor to error sensor first using IFLS according to sampled data, secondly, identifies the function H2 of secondary soures to error sensor using IFLS according to sampled data, then simulatively stimulates all models form primary sensor to secondary source with white noise, again using IFLS to identify the transfer function H1 of primary sensor to secondary source, and let them satisfy the following relationl H= -H1H2.