针对某型现役无人机活塞发动机飞行中出现的空中意外停车故障,从发动机停车控制原理出发分析其故障机理,构建发动机空中意外停车故障树,并用实例予以验证,为无人机发动机故障的空中应急处置和事后维修提供可行性建议。 Aiming at the accidental parking accident in air during the flight of a certain type of active UAV piston engine, the failure mechanism is analyzed based on the principle of engine stopping control. The accident tree parking fault tree is constructed and validated by an example. Emergency response and maintenance to provide feasible advice.