基于改进型指数趋近律的PEMFC供气控制器设计

PEMFC Gas Controller Design based on Improved Exponential Reaching Law

针对质子交换膜燃料电池(PEMFC)电堆氧气过低问题,给出一种滑模变结构控制器设计方案,它能够有效解决PEMFC因氧气不足造成控制性能下降的问题.采用改进型趋近律代替传统滑模控制中指数趋近律,能够有效抑制控制器因切换产生的高频抖动,从而提高系统的控制性能.最后,通过仿真验证本文所给出的改进型滑模控制器较传统滑模控制器,具有稳定性更高、鲁棒性更强的特点.

A sliding mode variable structure controller is presented for the problem of low oxygen gas in the fuel cell(PEMFC)for proton exchange membrane fuel cell,which can solve the performance degradation of PEMFC caused by the lack of oxygen effectively.Improved index reaching law instead of traditional reaching law can effectively restrain the high frequency jitter generated by switching controller.It can improve the control performance of the system.Finally,simulation results show that the improved sliding mode controller has higher stability and better robustness than the traditional sliding mode controller.