To set the proper parameter of register and on-chip ram of TMC428, it can make TMC428 control three stepper motor in the same time, and realize three-axis control system.

At last, the hardware in the loop simulation system for three-axis stabilized satellite attitude control based on PC, with reaction wheel and gyro in the loop is designed.

The researches of this paper are very important and significative job to improve precision of servo-control system of three axis optical tracking test table even all type of electric simulator tables.