基于GSPN的飞机测试性指标确定方法研究

Research on Determination Method for Testability Index of Aircraft Based on GSPN

针对目前飞机测试性指标论证时缺乏有效方法支撑问题,提出了一种基于广义随机Petri网(Generalized Stochastic Petri Nets,GSPN)的测试性指标确定方法;通过分析飞机航线级的维修过程,构建过程的GSPN模型,并对模型进行求解和分析,得到测试性指标与使用可用度和平均修复时间之间的关系,以这两个指标共同作为约束目标,通过权衡分析确定飞机合理的测试性指标,并以某飞机测试性指标论证为例,演示验证了方法的可行性。

Aiming at the problem of lacking of effective method in the determination of aircraft testability index, a new method is proposed based on Generalized Stochastic Petri Nets. Through analyzing the maintenance process of the aircraft line level, the GSPN model of the process is constructed. Then the model is solved and analyzed. Meantime the relationship between testability index and operational availa- bility and mean time to repair is also obtained. Using the two indexes as a constraint, rational testability index is determined by trade--off analysis. Finally, taking the determination of one aircraft testability index as an example, the feasibility of the method is demonstrated.