| As the industrial revolution, the demand for goods is increasing. Society demand for energy is also expanding, and the environmental protection has been obtained much more attention.Taking into account the two factors simultaneously, a kind of safe, effective and pollution-free energy is indispensable to the future development. Proton exchange as a clean energy, the research for membrane fuel cells (PEMFC) has been studied for a long time, the control method research for PEMFC is also important. Such a system with highly non-linear and uncertainty, if the control problem can be converted to disturbances rejection problem, then the control will become more and more easy. The content of this research topic is shown below:1. According to the dynamic temperature model and electric power model of PEMFC, the working principle of the PEMFC and the characteristics of the cells have been analyzed, especially for the temperature characteristic of PEMFC. Some key factors which will effects the temperature control have been analyzed in this paper.2. According to the analysis of classic active disturbance rejection control (ADRC), the nonlinear feedback combination part of ADRC has some limitation, which will affects the ability of disturbance rejection and the effective of controller. Considering above, the sliding mode active disturbance rejection compound control (S-ADRC) method is proposed in this research, which adopts the switching law of sliding mode control in this control method. An example of an uncertain second-order system simulation is given to prove the effectiveness and robustness of the proposed control method.3. The proton exchange membrane fuel cell (PEMFC) is the research object in this paper. After the expansion of PEMFC system reconstruction, the control problem is converted to disturbance rejection problem. The S-ADRC is designed for PEMFC temperature control. To prove the ability of disturbance rejection of the controller, the external disturbance, the system uncertain and the system noise will be tested, at the same time, the classic ADRC with the same control parameters is applied to the PEMFC which is used to certify the proposed controller (S-ADRC) has stronger ability to resist disturbances. This topic research for this kind of uncertainty and unknown disturbance of chemical control process provides a new control direction. |
