Fractional PID controllers tuned by Particle Swarm Optimization for Multi-Input-Single-Output systems control

This paper deals with design of fractional-order PID controllers for Multiple-Input Single-Output (MISO) systems control. The controllers parameters are tuned by using the Particle Swarm Optimization (PSO) technique. The proposed idea is to design a SISO fractional order controller of each SISO subsystem by using the whole MISO system output and the desired-loop performances. Three different criteria are used in the PSO optimization technique. The performances of the fractional-order controllers are compared with those obtained with rational-order controllers through a numerical example.