Stiction compensated fuzzy controller design for non linear spherical tank level system using labview

Meenatchisundaram, S and Purohit, Asmita (2018) Stiction compensated fuzzy controller design for non linear spherical tank level system using labview. International Journal of Pure and Applied Mathematics, 118 (20). pp. 2023-2031. ISSN 1314-3395

[img] PDF
4282.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy

Abstract

Process system with pneumatic control valve as actuator is more prone to stiction over continuous long run as the frequency of setpoint change or disturbance impact is very low. This causes the controller output to be close to a fixed value almost all the time and the actuator will be forced to stay at the same position. This also induces nonlinear behavior of valve and in turn causes abnormalities in process plant during servo or regulatory change. Different methods and algorithms are proposed to compensate stiction. In this work, a simple fuzzy logic controller is designed to produce continuous oscillations around the setpoint once the process variable reach steady state. This causes the valve to continuously vary its position in a sluggish manner which avoids stiction due to fixed position for a long time, and at the same time keeping process value within the allowable tolerance. The designed fuzzy controller is tested in a nonlinear spherical level system with different operating regions and the results are found to be satisfactory.

Item Type: Article
Subjects: Engineering > MIT Manipal > Instrumentation and Control
Depositing User: MIT Library
Date Deposited: 02 Jul 2018 05:00
Last Modified: 02 Jul 2018 05:00
URI: http://eprints.manipal.edu/id/eprint/151396

Actions (login required)

View Item View Item