某卫星电源系统仿真试验台下位机系统的设计

Development of the Lower System of a Simulated Testbed for a Satellite's Electrical Power Subsystem

为验证和考核某卫星电源系统故障诊断专家系统的可行性和正确性 ,作者根据电源系统的工作原理 ,研制和开发了电源系统仿真试验台。本文主要从两部分来介绍该试验台下位机系统的设计方法 ,首先以太阳电池阵和损耗器为例 ,说明硬件模拟电路的设计方法 ,然后分析了单片机系统的硬件接口和软件设计方法。下位机系统的设计原理简单、功能可靠 ,能正确地模拟电源系统的正常与故障状态 。

In order to testify and examine the ability and correctness of a diagnostic expert system of the electrical power system of a certain kind of satellite,the authors have developed a simulated test system according to the operational principle of the electrical power system.In this paper,its lower computer system is mainly introduced in two parts.Firstly,the design principles of hardware circuits are illustrated by taking instances of simulated circuits towards solar battery arrays and ullage apparatuses.And then presented the methods to design hardware interface and software program of the single-chip microprocessor system.The design of this lower computer system is simple but reliable.It can simulate normal and faulty states of the power system,and has proved to offer adequate data for the validation of the expert system.