Title

Design of a neural network based intelligent PI controller for a pneumatic system

Document Type

Journal Article

Publisher

International Association of Engineers

Place of Publication

Online Journal

Faculty

Computing, Health and Science

School

Computing, Health and Science Faculty Office, Centre for Communications Engineering Research

RAS ID

6225

Comments

This article was originally published as

Kothapalli, G., & Hassan, M. Y. (2008). Design of a neural network based intelligent PI controller for a pneumatic system. IAENG International Journal of Computer Science, 35(2), 217-225.

Original article available here

Abstract

Abstract Pneumatic actuation systems are widely used in industrial automation, such as drilling, sawing, squeezing, gripping, and spraying. Also, they are used in motion control of materials and parts handling, packing machines, machine tools, food processing industry and in robotics; e.g. two-legged robot. In this paper, a Neural Network based intelligent PI controller is designed and simulated to increase the position accuracy in a pneumatic servo actuator where the pneumatic actuator consists of a proportional directional control valve connected with a pneumatic rodless cylinder. In this design, a well-trained Neural Network provides the PI controller with suitable gains depending on feedback representing changes in position error and changes in external load force. These gains should keep the positional response within minimum overshoot, minimum rise time and minimum steady state error. A comparison between this type of controller with a conventional PI type shows that the position of cylinder using a conventional PI controller keeps jittering even when the cylinder reaches the required steady state. This is because of nonlinearities that exist in the pneumatic actuator. This jitter does not persist when a Neural Network based Intelligent PI type controller is used.

DOI

10.1.1.148.7042

 

Link to publisher version (DOI)

10.1.1.148.7042