The Test Platform Simulation For BDS/INS Integrated Navigation System Integrity Monitoring Performance Evaluation

With its construction,BeiDou Navigation System(BDS)will definitely be the trend of the future navigation system in the field of Civil Aviation.And the airworthiness of BDS draws more and more researchers' attention.Integrated Navigation System is one of the important navigation systems in a civil aircraft,so researching the airworthiness of BDS/Integrated Navigation System(INS)the practical application value.Integrity is an important performance indicator related to civil aviation safety,and is used to provide timely warning in case of malfunction or reduced performance.At present,the evaluation of the Integrated Navigation performance focuses on its accuracy,while an ideal lab environment which evaluates its integrity is rare.Due to these problems,the research mainly focuses on the test and evaluation platform of the integrity monitoring performance of integrated navigation system.In this paper,the structures of integrated navigation system and the fault models which could occur in the integrated navigation system are first analysed,and then the existing integrity monitoring algorithms of loosely / tightly coupled system are focused.And aiming at the shortcomings of the existing integrity monitoring algorithm of loosely coupled system,an effective integrity monitoring algorithm suitable for loosely integrated system,which is verified using simulation data,is presented to improve.the intergrity monitoring and alarm capability of integrated navigation system.At last,a platform is builded according to the requirements of Technical Standard Order(TSO)-C129 A and DO-208,which can standardly evaluate the performance of the integrity monitoring of BDS/INS Integrated Navigation System.The platform uses C# and Python hybrid developing environment.Through the process of developing,it realized a series of functions including data simulation,algorithm evaluation,practical system evaluation and so on which provided good condition to test and develop practical onboard BDS/INS integrated navigation system.