健康评估是卫星在轨安全健康工作的关键技术之一。针对卫星控制系统的健康状态评估问题,首先分析了卫星控制系统的内部结构特征,将控制系统按其结构分层并提出了基于层次推理地健康状态评估方法,然后通过分析系统特有的工作关系确定了各级系统状态数的计算方法,最后以某型气象卫星的一种控制模式为例计算了从部件到整系统的各级别状态数。计算以及仿真的结果显示该方法能够利用状态数合理地表示控制系统的健康状态。 Health assessment is one of the key technologies for the orbital safety and health of satellites. In order to assess the health status of satellite control system, the internal structure characteristics of satellite control system are firstly analyzed. The control system is stratified according to its structure and the method of health status assessment based on hierarchy reasoning is proposed. Then the system-specific working relation is determined Finally, taking a control model of a certain type of meteorological satellite as an example, the number of states at each level from component to whole system is calculated. The results of calculation and simulation show that this method can reasonably express the state of the control system by using the number of states.