Research For Electro Dynamic Servo System Of Stabilizer Fin

The drive system of the fin stabilizer used to be electric-hydraulic servo system In recent years, with the development of the electromechanical integration it is made possible that using electric-mechanical servo system as the drive equipment of the fin stabilizer in small or medium ships. This paper is written in this background.At first, moment of force of the fin shaft is analyzed when ship has a complex movement on the sea in this paper, and the power curve that drive the fin stabilizer is offered. Then the drive system of the fin stabilizer is analyzed. To give a control policy which AC motor is controlled by applying electric current loop, speed loop, position loop in this system. And have a debugging to parameter of the classical PID controller. The results of the simulation are very good. Furthermore, in order to connect with microprocessors more convenient and thus digitizing the drive system, several methods of using an incremental photoelectric coding plate are analyzed to realize an angle or angular speed sensor. At last, the sensor is designed and debugged using floating M/T method and the effect is pretty goodj thus realizing the measurement of the angle and angular speed with high precision.