针对小卫星姿轨控仿真测试系统需模拟星上真实飞轮的需求,设计并开发了一种具有故障模拟功能的飞轮模拟器,除可以模拟飞轮正常工作状态外,还可以模拟多种飞轮故障状态。本设计采用4片TMS320LF2407A为核心控制器,实现对4路相互独立飞轮电气特性的模拟,并利用RS-485接口实现故障及参数注入,DSP则根据注入的参数对飞轮输出进行调整。飞轮模拟器已应用于小卫星姿轨控仿真测试系统中。 In order to simulate the real flywheel requirements of satellite, a flywheel simulator with fault simulation function is designed and implemented for the simulation system of attitude and orbit control of small satellite. In addition to simulating the normal working state of flywheel, it can also simulate many kinds of flywheel fault status . The design uses four TMS320LF2407A as the core controller to realize the simulation of four independent flywheel electrical characteristics and the use of RS-485 interface to achieve fault and parameter injection, DSP is based on the injected parameters of the flywheel output to be adjusted. Flywheel simulator has been used in the small satellite attitude and orbit control simulation test system.