Design of Classical and State Space Controller Using a Moving Coil Machine

Abstract

This paper looks at two methods of designing controllers among numerous approaches used in controller designs; the root locus method using the SISOTOOL in MATLAB and the state space method. The root locus is a classical graphical method, of all the classical methods this was chosen because it helps to understand fundamental concept of controller design, and a graphical understanding of what is going on in the system. This paper analyse, design, compare and contrast a classical method, PID and a more recent approach; state space to controller design. The state space approach is more modern and used to highlight the short comings of the classical approach. A laboratory moving coil meter was used for the design of the controller. The utilisation of the system identification toolbox in MATLAB was employed for the system modelling obtained and analysed. Finally the paper compares the performance of both designed controllers based on root locus and state space methods at the second order moving coil system and previous work done were subjected to due comparison.