Fuzzy logic based self tuning of PI controller for a non linear spherical tank system

G. Sivagurunathan, K. Jayanthi
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引用次数: 11

Abstract

Tuning the parameters of a controller is very important in system performance. Ziegler and Nichols tuning method is simple and cannot guarantee to be effective always. This paper investigates the design of fuzzy logic based self tuning Proportional Integral (PI) controller on a First order Plus Dead Time (FOPDT) non linear spherical tank system using block box modelling. The real time PI controller was designed for a liquid level process, the servo and regulatory responses of the controller were obtained. The simulation results of conventional PI controller, Internal Model Control (IMC) based PI controller and Self tuning Fuzzy PI controller is obtained using MATLAB. From the simulation it is clear that there is substantial improvement in the Self tuning Fuzzy PI controller in terms of peak overshoot, settling time, peak time, rise time, Integral Square Error (ISE) and Integral Absolute Error (IAE).
基于模糊逻辑的非线性球形罐系统PI控制器自整定
控制器参数的整定对系统性能的影响非常重要。齐格勒和尼科尔斯的调谐方法简单,不能保证总是有效。本文研究了基于模糊逻辑的一阶加死区(FOPDT)非线性球形罐系统自整定比例积分(PI)控制器的块盒建模设计。针对某液位过程设计了实时PI控制器,得到了控制器的伺服和调节响应。利用MATLAB仿真得到了传统PI控制器、基于内模控制的PI控制器和自整定模糊PI控制器的仿真结果。从仿真中可以清楚地看出,自调谐模糊PI控制器在峰值超调、稳定时间、峰值时间、上升时间、积分平方误差(ISE)和积分绝对误差(IAE)方面有了实质性的改进。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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