基于滑模观测器的质子交换膜燃料电池阴极进气系统解耦控制

Decoupling control for proton exchange membrane fuel cell air supply system based on sliding mode observer

针对质子交换膜燃料电池(PEMFC)阴极进气系统,提出了一种新型的解耦控制策略,解决了系统进气流量与压力的协同控制难题,实现了二者的高精度控制。建立了关于流量和压力的线性变参数模型,基于模型设计了一种滑模观测器与状态反馈控制器相结合的控制方案,其中状态反馈的增益值通过线性二次型调节器(LQR)进行求解。将控制方案在PEMFC阴极试验平台上进行验证,结果表明,本文方法可以实现对进气流量和压力的高精度控制,达到解耦控制的目的。

A new decoupling control strategy was proposed for the air supply system of proton exchange membrane fuel cell(PEMFC),which solves the problem of the cooperative control of the air flow rate and pressure,then realizes the high precision control of the both.A linear variable parameter model of the air flow rate and pressure was established,based on the model,a control scheme combining sliding mode observer and state feedback controller was designed,in which the gain value of state feedback was solved by linear quadratic regulator(LQR).The control scheme is verified on PEMFC cathode experimental platform.The high precision control of the air flow rate and pressure can be realized,and the decoupling control of flow and pressure can be achieved.