Proton exchange membrane fuel cell cathode pressure and flow observation method

The invention provides a proton exchange membrane fuel cell cathode pressure and flow observation method. The method comprises the following steps of S1, establishing a fuel cell air system lumped parameter model; S2, designing a self-adaptive observer based on the model to observe the pressure of a cathode cavity and the flow of a cathode inlet; S3, in the observer design process, considering the manifold inlet and outlet temperature difference caused by an intercooler to guarantee the convergence of the observer; and S4, inputting the measurable signals of a fuel cell system into the observer, and realizing the real-time accurate observation of the cathode flow and pressure through the real-time iterative operation. The proton exchange membrane fuel cell cathode pressure and flow observation method provided by the invention has the advantages that the arrangement of a signal acquisition sensor is convenient, the realizability is high, the observation precision is effectively improved, and the control effect