不稳定时滞过程的分数阶PI^λD^μ控制器设计

A Method of Designing PI^λD^μ Controller for Unstable Process With Time Delay

针对不稳定时滞过程,研究了一种基于设定值加权的分数阶PIλDμ控制器设计方法。首先采用比例环节构成内环反馈镇定不稳定时滞过程,然后基于等效的过程模型,依据设定值加权方法设计分数阶PIλDμ控制器,并进行了控制器参数整定。仿真结果表明:用此方法设计得到的分数阶PIλDμ控制器可以使系统获得良好的动态响应特性,干扰抑制特性以及克服系统参数变化的鲁棒性。

A method to design fractional PI^λD^μ controller based on set-point weight was studied for unstable process with time delay.Firstly,the inner feedback loop with a proportional controller was utilized to stabilize the unstable process with time delay.Then,the fractional PIλDμcontroller based on the equivalent stable process was designed by using the set-point weight strategy.The simulation results show that the fractional PI^λD^μ controller can ensure the system to have a better dynamic response characteristic,disturbance suppression performance and robustness against the system parameters perturbation.