Development Of Virtual Test Model Verfication Software

With the rapid development of virtual test technology,people gradually realize its value in practical application,and the application field of virtual test platform is more and more extensive.Therefore,people demand more and more credibility and accuracy of virtual test model.As the core element of the test system,the availability of the virtual test model will directly affect the follow-up work based on the model results.Therefore,the evaluation of the validity and credibility of the virtual test model is a problem that can not be ignored in the development of virtual test technology.The research objective of this thesis is to realize the digitalization,integration and automation of the verification process of virtual test model,systematization and quantification of evaluation indexes,to provide methods and means of model verification,to shorten the period of model verification,to improve the efficiency of virtual test verification,and to enable users to obtain the quantitative evaluation results of the model through simple operation.The main research contents are as follows.Firstly,the function analysis and case analysis of the software are carried out,and the overall scheme of the software is given.Then this thesis studies the validation and evaluation of complex virtual test model.Considering the complexity of the model and the numerous subsystems,the index system of the model should be established before the validation and evaluation work begins.The establishment of the index system is the starting point and difficulty of the model validation work.This thesis will provide users with the method of establishing the index system,guide users to complete the decomposition of the test model layer by layer,and produce a hierarchical index system.The quantitative evaluation method of the index of the model to be tested is studied.Based on the principle of data comparison,this thesis quantitatively evaluates the underlying indicators.U-test method,T-test method,parameter estimation method,TIC method,grey correlation coefficient method and periodogram method are proposed in this thesis.Because the above methods are qualitative methods,this thesis also studies the method of transforming qualitative results into quantitative results.Finally,the validity of the quantitative research of the above methods is verified.The method to determine the weight of each index in the index system of the model to be tested is studied.In this thesis,three methods of weight determination are proposed: expert assignment method,analytic hierarchy process and ring ratio coefficient method.Combining the previous research results,the software modules are developed and implemented separately,and then the modules are integrated to complete the software development work.Each module of the software has been developed and integrated,and the development of the software has been completed.Finally,taking the aircraft as an example,the practicability of the software is verified from four aspects: index system construction,index calculation,weight determination and comprehensive verification.The verification results show that the software developed in this thesis meets the technical requirements.