Research on Adaptive Speed Control of Marine Diesel Engine based on Discrete Time Integral Minimal Control Synthesis

The marine diesel engine propulsion system is a nonlinear, time-varying, and uncertain system. A new method based on the discrete-time minimal control synthesis algorithm (DTMCSI) is proposed to address the problems of long controller parameters adjustment cycles and degradation of dynamic speed regulation performance when its structure or parameters are changed. It can achieve accurate control of engine speed without any a priori knowledge of object parameters. Firstly, the response relationship between the speed and the fuel injection is modeled based on the idea of mean value modeling of diesel engines. Then, a speed control strategy for DTMCSI was designed. The resulting control strategy seems simple enough to adjust the engine speed quickly and precisely. The tracking performance is compared with that obtained with a standard PID controller. Simulation results show that this control method can improve the precision of engine speed control. In addition, the calibration of control parameters can be greatly reduced.