- 期刊
pH Control Using a Commercial PID Controller with Gap Action
應用商用型具間距作用PID控制器於pH控制
摘要
pH控制因其高度非線性和時變的特性，在工業製程上被認為是很具挑戰性且重要的課題，一般也普遍認為傳統的PID控制器在pH製程控制方面成效不彰。本文深入研究討商用型具間距作用之PID控制器於pH控制的實務應用問題，首先藉由間距作用的引入以合併pH程序的非線性及時變性質，提出此間距作用的設計原則，可得其參數調諧曲線；接著，探討具間距作用之PID控制器的參數調諧策略，可適用於廣大的pH操作範圍。模擬結果顯示，所提商用型PID控制器之控制策略除具有良好的pH操控性能外，對模式誤差亦有相當之韌性。
關鍵字
無資料並列摘要
pH control is recognized as a challenging and industrially important problem due to its highly nonlinear and time-varying characteristics. In the literature it is well known that the traditional PID controller gives a poor performance in controlling pH processes. This article studies the practical implementation problems of a commercial PID controller with gap action for the control of pH. Design principles and tuning procedures are proposed first by introducing the gap action to incorporating the high nonlinearity of the pH processes. Then the parameter tuning curve of the gap action is developed over a large operating range of pH. Therefore, the typical minimum error integral tuning formulas can be directly used to set the suitable PID controller parameters. Simulation results demonstrate satisfactory performance of the proposed pH control strategy.