Real-time simplified variable domain fuzzy control of PEM fuel cell flow systems

The problem of building an accurate model and the request of real-time control are often simultaneously encountered in the design of control systems. This paper studies and implements a real-time simplified variable domain fuzzy control method in PEM fuel cell flow systems. The method can achieve not only the fine control over cathode pressure of fuel cell stacks by adjusting the input and output domains, but also the real-time control by activating at most four control rules at a time in the inference process for dual-input controller. The experimental results with no load and under a given load demonstrate good performance of this method. The method might also be utilized in other similar processes.