The Adaptive Control Of Direct Current Electric Motor Propulsion System Of Naval Vessel

DC electric propulsion system always takes a dominant station in submarine propulsion. These years , accompanied by the development of power-electronics technique and micro-control technique, permanent magnetic DC motor is characterized by small volume, light weight, high efficiency with low noises, big stand-alone capability and high reliability, which is possible to become a new generation submarine propulsion motor.With the good dynamic and static performance, double-closed-loop speed regulation system of speed and current is making an extensive application in the industry production. In another part, caused by various factors, the system is so difficult to adapt to the large-scale variety of object parameter that the influence of the process caused by environment and the variety of the process is inevitable. For example, inertial variety of machine in the electric motor axle, the system enlarged scale vary when the electric current breaks, etc. The dynamic performance varies obviously when object parameter varies in a large scale.According to the characteristic of submarine propulsion runs and characteristic of permanent magnetic DC motor propulsion system, the paper analyzed diversified varieties caused by object parameter varied and laden disturbance, and adopted the method of adaptive control to solve all these problems. I designed a controller according to Narendra project of MRAC ,which can make the system stabile, dependable, valid. Because of adjustive action of the controller, the result is satisfying when object access is not saturated, load varied slowly and rotational inertia varied in a large scale.Make use of the characteristic that the controller can change parameter itself when object parameter varies in a large scale, the thesis attain the anticipative purpose that the performance of control system maintained steadiness and the performance of propulsion system was amended.