Environment Control Exciter Simulation Of Integrity Test Of BDS Airborne Receiver

With the rapid development of BDS system and technology,BDS satellite navigation system has gradually become the core force to support civil aviation operation.Integrity is the key index to ensure flight safety.Perfectness test of BDS airborne receiver has become the focus of research and market demand.Integrity performance test is an important part of BDS navigation system.Therefore,it is of great value to study the integrity test of BDS airborne receiver.At present,the performance test of BDS navigation equipment mainly focuses on the optimization of hardware performance and integrity algorithm.The test scheme and test environment of BDS airborne receiver still need to be improved.Aiming at these problems,the simulation realization of the environmental control actuator for BDS airborne receiver integrity test is mainly studied.According to the requirements of the integrity performance test of airborne equipment in different flight stages,based on the analysis of various index requirements of the integrity test,the effects of various error sources were first analyzed,the typical error correction model was determined,and the RAIM of BDS airborne receiver was simulated.Referring to the performance test standard of GPS airborne equipment in RTCA/DO-208 standard document,the integrity test scheme of BDS airborne receiver is determined.Through setting flight trajectory data,error simulation and fault addition,the environment configuration module is constructed.The data interface module uses ARINC429 board and UDP protocol to transmit navigation information,visible star information and reference flight information.According to the evaluation process of integrity testing software,the development of testing software is realized.The mixed programming of VS and Matlab is adopted.Finally,based on the integrity test function module and the test evaluation software,the environment-controlled exciter is built.The operation of the environmental control exciter is stable,realizing the goal of generating navigation information,data transmission between devices and integrity evaluation,which provides a reference for the performance test of BDS airborne receiver.