Design of γ-Suboptimal H∞ Speed Controller for Diesel Engine

Diesel engine is a complex nonlinear system. In view of the uncertainty model in process linearization diesel and insufficient robustness existing PID controller, robust control theory applied to speed engine. Firstly, quasi-steady state locally linearized establish its space model. Then, by analyzing stability under friction torque uncertainty, H∞ controller established, law finally obtained solving LMI method. Finally, simulation experiment designed MATLAB/Simulink environment. The results show that has strong fault tolerance, good resistance external disturbance, regulation obviously better than traditional controller.