Modeling and Analysis of Implementation Process for Civil Aircraft Certification Test Flight Based on Stochastic Petri Net
Certification test flight is an important activity for civil aircraft to obtain a type certificate,characterized by high cost and high risk.Studying the implementation process of certification test flight is conducive to promoting the orderly conduct of test flight,thereby reducing the test flight cycle and cost.Currently,research on the test flight process is limited to process description and qualitative analysis,lacking formal modeling and performance analysis of it,which hinders the examination of key links in the process.In order to solve the above problems,the implementation process in the three stages of certification test flight is studied,and the simulation model of it is constructed by using stochastic Petri ne(SPN).By establishing a Markov chain isomorphic to the model,the performance analysis of the implementation process is conducted to identify the time-consuming key links in the process.Furthermore,the impact of the implementation rates of key links on the average running time of the process is analyzed.Finally,the feasibility of the model and method is validated through a case study.The results show that the manufacturing com-pliance check and test flight data processing are the time-consuming key links in the process and should be the focus of process optimization.Compared to improving the speed of individual link,enhancing the implementation rates of these two key links at the same time has lower cost and greater improvement in process efficiency.
Implementation process of certification test flightStochastic Petri netMarkov chainPerformance analysisKey links
NETL
NSTL
万方数据
