Research On The Application Of Digital Control Of Electro-Hydraulic Loading System Of Fin Stabilizer

The electro-hydraulic simulation platform of fin stabilizer is for short loading system of fin stabilizer, which is key equipment that can research, test and examine fin stabilizer. Its function is reproduced forces condition including inertia force load, water-power load in different speed or fin angle. It can detect and examine static characteristic, dynamic characteristic, control precision and work reliability etc. Through substituting material object and material place, we can reduce research period, economize funds and increase reliability and successful rate.Electro-hydraulic load simulation platform of fin stabilizer is a kind of typical passive electro-hydraulic force servo system. Due to strong disturbance of fin angle, surplus forces are produced that can badly influence static and dynamic characteristic of loading system.The elimination of surplus forces can adopt structure compensation and control compensation. Analog control has insurmountable limitation in fore years. Due to the development of computer control skill, we can utilize digital control technique to eliminate surplus force maximum and increase load performance, which is the emphases of this paper.We analyze producing cause of surplus forces through simulation toward mathematical model of loading system of fin stabilizer. Under non-ideal condition of PID parameters determination, fuzzy -adaptive PID parameters is adjusted and simulated adopting fuzzy control theory. Finally, the digital controller is designed using DSP and PCL-1800 industrial control computer according to actual performance index request, and then we analyze experimental data of static loading and dynamic loading.