关键词: 分数阶PID控制器, 粒子群算法, 细菌觅食算法, 参数优化, 鲁棒性

Abstract: Fractional order Proportional-Integral-Derivative (PID) controller is a PID controller to the fractional Proportional-Integral-Derivative controller; it can more precisely control the complicated system than the traditional PID controller. The parameter values play a decisive role in the effects of control. A new hybrid algorithm was proposed. The Bacterial Foraging Algorithm and Particle Swarm Optimization (BFA-PSO) were combined to calculate the precise fractional order controller parameter values, which used the chemotactic, reproduction and elimination-dispersal of the BFA and combined the merits of few parameter and being easy to optimize. The simulation results show that the algorithm based on the fractional order PID control is of not only non-overshoot and fast convergence but also robustness and high precision, so it can be used to control different kinds of objects and processes.

Key words: fractional order Proportional-Integral-Derivative (PID) controller, Particle Swarm Optimization (PSO), Bacterial Foraging Algorithm (BFA), parameter optimization, robustness