说明：  通过迷你开发板m9020-fnu201实现对伺服电机的控制。运用力矩的方式对伺服电机控制而且运用力反馈的方式对伺服电机精确控制
(Development board through the mini-m9020-fnu201 achieve servo motor control. The use of torque on the servo motor control and the use of force feedback on the precise control of servo motor)