自适应光学系统涉及到光学、电控等多个领域，因此分析和提高自适应光学电控系统的可靠性是非常必要的。引入基于故障树的分析方法，对自适应光学电控系统中影响成像的关键模块，例如波前探测单元、波前处理单元，建立了系统的故障树模型，并对其定性分析得到了系统的最小割集，定量分析得到了系统的故障概率以及底事件概率的重要度排序。根据分析结果，可以有效地提高系统的稳定性，优化系统设计。

The adaptive optics (AO) system involves many fields like optics, electronic control and so on, so it is necessary to improve the reliability of the electronic control system. The fault tree analysis (FTA) method introduced, and the key modules, such as the wavefront detection unit, wavefront processing unit, are analyzed.A fault tree model of the system is established. The minimum cut sets of system are got through qualitative analysis. Similarly, the probability of failure of the system and the order of the importance of bottom incident are got through quantitative analysis. According to the result, the stability of system can be improved and the design of system can be optimized effectively.