Design And Study Of The Fuel Cell Control System Based On Arm 9

Fuel cell is a high efficient and clean power generation technique.And now it is regarded as one of the most competitive energy sources for the distributed power generation systems. The fuel cell control system is the key technology of the whole system for its safe, reliable and high efficient operation. With the development of relevant technologies, the control with more excellent performance and compact size is required. In this thesis, the PEMFC control system based on embedded technology is designed and implemented as the backup of grid voltage, it also intelligentize and miniaturize the fuel cell system.The development of the fuel cell and embedded system are introduced firstly. After the total design theme of the system, this thesis focuses on the hardware and software development. The stack temperature model is established and simulated using matlab, and the fuzzy PID control for this model is realized in the Linux environment.The thesis mainly focuses on:1. A 5kW PEMFC is designed. For the control system, S3C2410 processor with ARM9 kernel as the controller chip is adopted.2. Build the environment for the development, including the cross-compiling environment, the Linux 2.6 kernel transplantation and so on. Aiming at the special hardware, device drivers of the GPIO, PWM and UART modules of ARM processor are designed to realize the control output. According to the control requirements of the fuel cell system, the software system is designed into several layers. The method of combining multi-process with multi-thread is used to realize the real time control of the multi-channel system. 3. A fuzzy PID algorithm for temperature control system is proposed. By analyzing the temperature system feature, the fuzzy PID algorithm is designed and simulated by Matlab. From the simulation result, this algorithm improves the fuel cell system's performance.