步进电动机的角位移量与输入脉冲数严格成正比，电动机转动一圈后，没有累积误差，所以步进电动机是数字控制系统常用的执行电动机，并且广泛的应用在小卫星上。为了

使步进电动机在小卫星上安全运行必需在地面做相应的检测。下面介绍在小卫星有效载荷地面检测仪中利用WindowsXP多媒体定时器实现步进电动机高精度控制的方法。-stepper motor angular displacement volume and input pulses strictly proportional to motor rotating ring, no accumulated error, the stepper motor is used digital control system implementation motor, and widely used in small satellites. To stepper motor in a small satellites necessary for safe operation on the ground do the same testing. Below introduced in a small satellite payload ground detector using Windows XP multimedia timer -- Stepping Motivation high precision control method.