线性系统脉冲响应的实时高精度辨识

Real Time and High Precision Identification of Pulse Response of Linear System

本文首先介绍相关辨识中使用的三电平伪随机信号PRTN的特点,然后推导出应用PRTN作为输入信号的相关辨识的有关公式,并介绍使府TP86A单板机组成的高精度实时辨识装置以及用来进行一阶线性系统实时辨识的情况,由此证明理论分析与实际辨识结果相符.最后,讨论了在辨识过程中常见的干扰及其消除方法.

At first,this paper introduces the main features of 3-level pseudorandom signal PRTN and derives some useful equations about the correlation identification by using PRTN as the input signal.Furthermore,it introduces a high precision real-time identification device by using TP86A single board computer and gives the results of real-time system identification of a given one-order linear system.It proves the coincidence of the theoretical analysis discussed and the results of the practical identification obtained.Finally,some interferences often occured in the process of system identification and the elimination methods of their effects are also discussed.