为了简便、全面地研究各种热控系统故障对卫星各热控环节温度变化的作用和影响，将卫星热故障划分为热阻型、控制策略型和诱发型热负荷变化3种基本类型，建立了卫星外壳、辐射器、舱内环境和关键目标仪器4个主要热控环节温度变化的动态方程，应用热故障模拟模型，可以对各类热控系统发生故障时的热控环节温度变化规律进行较全面的仿真研究，从而为热控系统故障诊断及容错控制系统设计提供简便的数学模型和仿真方法。

In order to master the satellite temperature change caused by thermal control system faults more easily and roundly, satellite thermal control system faults were sort into three basal classes： thermal resistance type, control strategy type,and passive heat load change. A dynamical model which can reflect the temperature change laws of satellite surface, radiator, indoor environment and key electrical equipment was also introduced. With this model the temperature changes caused by thermal faults can be conveniently simulated and this provides a mathematical model and simulation method for fault diagnosis and fault-tolerant control system design of satellite thermal control.