基于系统辨识的PID参数自整定算法在合成氨装置中的应用

从中石化湖北化肥分公司合成氨装置DCS系统中PID参数整定的实际出发,介绍了几种国内外PID参数自整定方法,分析它们的优缺点及存在的问题,提出一种新的基于系统辨识的PID参数自整定算法.论述基于VB的PID参数自整定软件开发,给出PID参数自整定程序设计界面.将这种PID自整定算法在中石化湖北化肥分公司DCS系统中进行应用实验,得出PID参数自整定前后PV趋势对比图,从而验证这种PID自整定算法的可行性.

A SORT OF PID PARAMETER SELF-TUNING ARITHMETIC BASED ON SYSTEM IDENTIFICATION AND ITS APPLICATION IN AMMONIA PLANT

The text, from the fact of PID parameters tuning in DCS system of ammonia plant of Hubei Chemical Fertilizer Branch Co., presents some PID parameters self-tuning methods at home and abroad, analyzes their advantages and disadvantages and the problems existed, puts forward a new PID parameters self-tuning arithmetic based on system identification. The text discusses the soft- ware development of PID parameter self-tuning based on ~qB, and gives the program interface of PID parameter self-tuning. The test was made in DCS system of the ammonia plant, getting the PV trend contrast chart before and after the new PID parameter self-tuning arithmetic was realized, further demonstrating the feasibility of the PID parameter self-tuning arithmetic.