Design of fuzzy-PID controller for tracking performance of machine tool

Halim, Nabilah (2016) Design of fuzzy-PID controller for tracking performance of machine tool. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This report presents the work done on designing controllers for tracking performance of XY table ball screw drive system. There are three critical demands in designing controller for machining operation in many manufacturing environment. The components include high tracking accuracy, high tracking precision and robustness. The evolution of machine tools technology through advancement of the machine tools controller causes the persistent demand of better tracking accuracy in industry of machine tool. The objective of this project are to design PID and Fuzzy-PID controller for tracking performance of XY table ball screw drive system and to compare the controllers through simulation with two different input signal which is sinusoidal and step input. The comparison of the result between simulation with injected disturbance forces for sinusoidal input, firstly with the value of 1500N, 2500N and lastly 3500N. while for step input based on transient response. The transient response including the percent overshoot, rise time, peak time and settling time. The controllers are designed based on the analysis of gain margin and phase margin, bandwidth, stability and sensitivity. The designed controllers have fulfilled the rule of thumbs for the gain margin and phase margin. For gain margin, the rule of thumb is 4-10dB while phase margin is 300-900. In step input the Fuzzy-PID controller show the fast response compare to PID controller. It is recommended to add another method of analyzing the designed controller by visualization using image processing which helps to detect the tracking error of the system easily.

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