Abstract
Satellite when outer space movement, the satellite attitude is the satellite normal work basic guarantee. Because in the star the moving part, the spatial moment of force is the satellite attitude stable disturbance factor, therefore, carries on the simulation in the ground experiment to these disturbance factor, has the vital significance to the satellite attitude control system's development. This article designed one kind of smallsat moment of force based on the MCS-51 monolithic integrated circuit to load the ground simulation control system, came to carry on the simulation to these disturbance factor. The hardware circuit take the ADuC841 monolithic integrated circuit as a core, uses the electro-optical encoder and CPLD gathers electrical machinery's path. Carries on the modelling simulation using the MATLAB simulation software to this system, determines system's controlled variable. Monolithic integrated circuit's control master routine has used the modular design, causes the program structure to be clear, the readability is strong, simultaneously has carried on the design programming and the simulation using Quartus II pair of CPLD. In the control algorithm, uses the mature PID control policy, enabled the system to obtain the good performance.
key word: Smallsat moment of force load; ADuC841; CPLD; PID control; MATLAB simulation
