Investigation of Robust Control of Position Control System

The objective of this paper is to design the robust controller for position control system. Here, Sun Seeker System (SSS) has been taken as the position control system. On a space vehicle, Sun seeker is mounted so that we can take the maximum amount of current possible from Photovoltaic cells (PV). To study the robust control analysis of this system, fractional order PID (FOPID) controller with FOMCON toolbox is investigated for different performance criteria such as Integral Time Absolute Error (ITAE), Integral Square Error (ISE) and Integral Absolute Error (IAE). Now to find the robust controller for the position control system, comparison between the PID and FOPID controller with different performance criteria have been carried out when they are tuned by MATLAB toolbox and Genetic algorithm (GA). The simulation results show that the controllers with fractional order derivatives and integrals give better performance and robustness when compared to the conventional controllers.

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