Designing mixed <i>H</i><sub>2</sub>/<i>H</i><sub>∞</sub> structure specified controllers using Particle Swarm Optimization (PSO) algorithm
- 1 Electrical and Electronics Department, Engineering College, Thi-Qar, Iraq
- 2 Electrical and Electronics Department, Engineering College, Thi-Qar, Iraq
- 3 Iraq University College, Basra, Iraq
Abstract
This paper proposes an efficient method for de signing accurate structure-specified mixed H 2 / H ∞ optimal controllers for systems with uncertainties and disturbance using particle swarm (PSO) algorithm. It is designed to find a suitable controller that minimizes the performance index of error signal subject to an unequal constraint on the norm of the closed-loop system. Although the mixed H 2 / H ∞ for the output feedback ap proach control is considered as a robust and op timal control technique, the design process normally comes up with a complex and non-convex optimization problem, which is difficult to solve by the conventional optimization methods. The PSO can efficiently solve design problems of multi-input-multi-output (MIMO) optimal control systems, which is very suitable for practical engineering designs. It is used to search for pa rameters of a structure-specified controller, which satisfies mixed performance index. The simulation and experimental results show high feasibility, robustness and practical value compared with the conventional proportional-integ ral-derivative (PID) and proportional-Integral (PI) controller, and the proposed algorithm is also more efficient compared with the genetic algorithm (GA).
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