Auto Tuning of PI Controller using Fuzzy Logic for the Spherical Tank System and its Real Time Implementation

Авторы

  • G. Sakthivel
  • R. Vinodha Department of Electronics and Instrumentation Engineering, Annamalai University Chidambaram, Tamilnadu, India
  • S. P. Natarajan Department of Electronics and Instrumentation Engineering, Annamalai University Chidambaram, Tamilnadu, India

Ключевые слова:

Fuzzy controller, PI controller, spherical tank, system identification, Fuzzy tuners

Аннотация

In this paper, Auto Tuning of PI controller using fuzzy logic is developed to improve the performance of the spherical tank process. A real time implementation of proposed controller for a spherical tank to control liquid level is studied. Control of liquid level in a spherical tank is highly non linear due to variation in the area of cross section of level system with change in shape. System identification of spherical tank system is done using black box model which is identified to be non linear and approximated to be a first order plus dead time model. Here the conventional PI controller parameters are obtained based on Ziegler-Nicholas (ZN) method and its servo & regulatory responses are compared with PI controller tuned by fuzzy logic. The real time implementation of the process is designed and implemented in MATLAB using VMAT-01 Data Acquisition Module. Fuzzy logic is used to tune each parameter of PI controller, fuzzy rules are designed to tune the parameters Kp and Ki of the PI controller, the performance of the spherical tank system has improved significantly compare to conventional PI controller. Keywords: Fuzzy controller, PI controller, spherical tank, system identification, Fuzzy tuners

Загрузки

Опубликован

2014-12-04

Выпуск

Том 5 № 3 (2014)

Раздел

Research Articles

Лицензия

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

·         I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.

·         I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).

·         I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.

·          I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

_______________

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.