闭环连续系统仿真若干问题的分析研究  

Analysis of Several Problems on Simulation of Closed-loop Continuous System

作　　者：黄静[1] 潘立登[1] 

机构地区：[1]北京化工大学自动化研究所,北京100029

出　　处：《控制工程》2006年第S2期87-88,203,共3页Control Engineering of China

摘　　要：分析研究了对闭环系统的纯滞后环节如何处理的问题,找到开环系统和闭环系统的理论输出值计算方法,并比较3种Pade近似和全极点近似的精度。将此算法应用到闭环系统中,进一步比较4种近似,以求得闭环系统中误差最小的近似方法。同时提出在计算过程中对纯滞后处理的改进方法,使得误差大大减小,精度提高了一个数量级。研究结果表明,在开环系统和闭环系统,全极点近似由于没有引入零点,使得误差最小;改进方法使误差精度提高了一个数量级。Several problems on simulation of closed-loop continuous system are discussed.The calculation methods of output value in both closed loop system and open loop system are found.Three Pade approximation methods and all-pole approximation method are contrasted in both open loop system and closed loop system.Besides,a method of revising time delay is presented,which leads to drastic decrease of calcu- lation error.The result is that all-pole approximation method results in the smallest error in both closed loop system and open loop system,as it does not lead to zero-pole.The revising method increases the error precision by an order of magnitude.

关 键 词：连续系统 纯滞后 帕德近似 全极点近似 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]