设计了一个驱动机构精密角速度测试系统,该系统可以精密测量驱动机构的输出轴在低速转动时的角速度。系统中模拟了惯量负载和扭矩负载,通过在轴系中加入扭矩反馈,使电控加载器能够实现在极低速工况下精确加载扭矩,并提出了一种基于虚拟仪器的模拟负载波形的实现方式。通过实验测试了驱动机构带四种不同负载时的角速度,并通过后处理软件得到驱动机构的角速度特性。 A precision angular velocity test system for the drive mechanism was designed to accurately measure the angular velocity of the output shaft of the drive mechanism during low speed rotation. In the system, inertia load and torque load are simulated. By adding torque feedback to the shaft system, the electronic control loader can accurately load the torque at very low speed. And a simulation load waveform based on virtual instrument is proposed the way. The angular velocity of the driving mechanism with four different loads is tested by experiments and the angular velocity characteristics of the driving mechanism are obtained by the post-processing software.