Sliding mode control for fuel oil viscosity of marine diesel engine

An advanced 10000 TEU container ship is adapted as the main object of study in this paper. According to the law of energy conservation and thermodynamic principle, the mathematical models for major components of fuel oil viscosity control system (FOVCS) of marine diesel engine are established. For being insensitive to parameter variation or disturbance and the advantage of fast response, sliding mode variable structure controller based on exponential reaching law is proposed and used in FOVCS. In order to eliminate the chattering phenomenon caused by the sliding mode control (SMC), variable exponent reaching law is used to optimize the controller. The optimized sliding mode controller and the traditional PID controller are applied to simulation system respectively. Simulation results show that the optimized sliding mode controller has good performance, strong adaptability and robustness.