论文部分内容阅读
针对小卫星半实物仿真系统的技术需求,提出了一种太阳敏感器电模拟器设计实现方法;模拟器以FPGA作为控制核心,采用压控电流源实现了0-1式太阳敏感器、模拟式太阳敏感器的输出电流模拟;通过专用电流源芯片REF200实现了数字式太阳敏感器输出电流模拟;模拟器由计算机通过RS-485接口控制,既能模拟太阳敏感器正常工作时的电信号输出,也能模拟太阳敏感器出现故障时的电信号输出;该太阳敏感器电模拟器已应用于小卫星的半实物仿真,其电流精度可达±1μA。
Aiming at the technical requirement of small satellite semi-physical simulation system, a method of designing and implementing solar sensor electrical simulator is proposed. The simulator uses FPGA as the control core, realizes the 0-1 type solar sensor with voltage-controlled current source, The output current of the solar sensor is simulated. The output current of the digital solar sensor is simulated by a dedicated current source chip REF200. The simulator is controlled by the computer through the RS-485 interface, which can not only simulate the electrical signal output of the solar sensor during normal operation, It also simulates the electrical signal output in the event of a solar sensor failure; this solar-sensing electrical simulator has been used in a hardware-in-the-loop simulation of small satellites with current accuracy of ± 1μA.