基于终端滑模控制的燃料电池进气管理

Fuel cell air intake management based on terminal sliding mode control

适当的进气可改善燃料电池的输出特性,但过量的进气可能导致质子交换膜损坏、氧匮乏和输出效率低等问题。进气系统过氧比值能反映气体供应的情况,是衡量燃料电池系统运行状况的重要参数。根据质子交换膜燃料电池(PEMFC)系统建模分析过程,将负载电流作为外部扰动,并基于模型设计出比例-积分-微分(PID)控制器、传统滑模控制器(SMC)和非奇异终端滑模(NTSM)控制器。仿真结果表明:3种控制算法均能实现稳态跟踪,但两种滑模控制器的控制效果好于PID控制器,NTSM控制器的控制时间比PID控制器和SMC分别减少70.5%和48.5%。

Proper air intake could improve the output characteristics of the fuel cell,but excessive air intake might cause damage of proton exchange membrane,oxygen deficiency and low output efficiency.The oxygen excess ratio of the air intake system could reflect the gas supply,which was an important parameter to measure the operating condition of the fuel cell system.Based on the proton exchange membrane fuel cell(PEMFC) system modeling and analysis process,the load current was taken as an external disturbance,the proportional-integral-derivative(PID) controller,traditional sliding mode controller(SMC) and non-singular terminal sliding mode(NTSM) controller were designed based on the model.The simulation results showed that three control methods could realize steady-state tracking,but the control effect of two sliding mode controllers was better than that of the PID controller.The control time of the NTSM controller was reduced by 70.5% and 48.5% than that of the PID controller and SMC,respectively.