DSP Controller Design And Control Research Of Fin Stabilizer Loading System

The electro-hydraulic loading system is a kind of equipment for simulating the hydrodynamic force on fin stabilizer, its function is to reappear each kind of loads which the fin withstands under the laboratory condition. As a typical servo system for simulating various loads in the experiment, the electro-hydraulic loading system is quite a complex machine-electricity-hydraulic multiple system. Seeing from the control subject, it is also a strong-coupling and time-changing controlled object.This paper studies how to eliminate the surplus force and enhance the system loading precision in maximum extent. The first characteristic is: uses both feed-forward control and PID control to constitute compound control system to carry on the adjustment to the loading system. Feed-forward control carries on the thick adjustment to the system according to the structure invariable principle, PID control carries on the micro adjustment to the system through changing P, I, D coefficients, they together enhance the performance of the system. The second is: increases the loading precision by designing high performable DSP controller. The hardware uses CPLD to complete the decoding that DSP visit the components outside of chip, the software optimizes procedure code of each module.The paper divides into four parts. The first part, analyzed the principle and electrical control composition of the system, established the mathematical model. The second part, carried on the no-disturbance simulation and disturbance simulation, designed adjustment link with feed-forward compensation and PID control, analyzed the generation of surplus force, completed the computation of force target and system configuration with VB. The third part, constructed Client hardware circuit, established DSP minimum system, analog sampling channel, D/A switching circuit, CPLD interface circuit, RS232 interface circuit. The fourth part, designed software system of numeral controller, carried on the programming to system initialization module, A/D transformation module, PID controller module, D/A transformation module and serial communication module.