Analysis Of Continuous And Discrete Control Systems Using PID Controller

• Main Author: Khalaf, Aswaq Abdulameer
• Format: Thesis
• Language: English; English
• Published: 2016
• Subjects: Q Science (General); QA Mathematics
• Online Access: http://eprints.utem.edu.my/id/eprint/18386/1/Analysis%20Of%20Continuous%20And%20Discrete%20Control%20Systems%20Using%20PID%20Controller.pdf; http://eprints.utem.edu.my/id/eprint/18386/2/Analysis%20Of%20Continuous%20And%20Discrete%20Control%20Systems%20Using%20PID%20Controller.pdf; http://eprints.utem.edu.my/id/eprint/18386/; https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=100304

The Proportional-Integral-Derivative (PID) control strategy should be understood as a huge part in the engineering education oriented on process control. At the same time, this education could be difficult because of control system transfer function nature; some of this function has a long decimal numbers which make the mathematical calculation and system response analysis difficult. Applying suitable software using Graphical User Interface (GUI) windows able to contribute to enhance the quality of education and give a better understanding of the PID control. This work explains the PID controller three-term parameters affecting the closed-loop control system response. Ziegler-Nichols and manual tuning methods are used for setting the PID controller parameters in s-domain. The discrete-time PID controller is the most popular controller because of the technology development in the last few decades. The PID controller parameters are set in s-domain before they are converted into z-domain using one of the conversion methods. The conversion of the control system with PID controller is quite difficult. This dissertation discusses some of the common conversion methods that are used to convert the PID controller transfer function from continuous-time to the discrete-time and then analyzing the system response behavior in z-domain. The analysis of the control system in z-domain is more difficult compared to the s-domain. By using the GUI/MATLAB windows it improves education quality and gives more understanding of both the continuous-time and the discrete-time systems with the PID controller. A typical test on three case studies composing the third-order plant, speed control and position control of DC motor are used to show the implementation of these conversion methods and quality of the resulting z-domain systems. The simulation results from the GUI/MATLAB windows show the effect of sampling time on each one of the selected conversion methods.