差分进化算法，整定分数阶PID控制器参数(Differential evolution algorithm, tune fractional PID controller parameters)

整定PID参数时，需采用一种不需要任何初始信息并可以寻求全局最优解的、高效的组合优化方法(When tuning PID parameters, an efficient combination optimization method is needed, which does not need any initial information and can seek global optimal solution)