Abstract
Diesel engine speed control system is one typical nonlinear system. In order to control speed of the single input nonlinear engine, the nonlinear model of the 4135 engine governor is established and the sliding mode variable structure controller is designed in the paper. Simulation in MATLAB has demonstrated that the sliding mode variable structure control is able to respond quickly, robust against system parameters and external disturbances, and able to keep the system stable, obtain strong robustness. This paper solves the problem that for the conventional PID controller, the overshoot is too big, settling and rise times are too long.
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