Design of Highly Reliable Positioning System Based on Beidou/GPS Dual Mode Module
In order to solve the problem of positioning and reliable recovery of some important structures of aircraft after flight test,a highly reliable positioning system based on Beidou and GPS dual-mode module is designed.The system uses the BDM 910 module integrated with GPS/RNSS(Radio navigation satellite sys-tem)module and RDSS(Radio determination satellite system)module as the core positioning device is used in the system,and the BDS(Beidou navigation satellite system)frequency point and GPS frequency point navigation messages are received through dual links and four antennas redundancy.While effective satellite navigation signals are captured,the system own position information is resoved in real time.The location in-formation is sent to the search device in real time in the form of Beidou short message,and the landing point coordinates of the aircraft are finally determined.The problem of positioning and recovery of relevant impor-tant structures is solved in the flight test in a complex environment.The positioning system has the ability to analyze the positioning data and the communication information of the positioning device in real time,the data analysis rate is less than 5 s,the positioning accuracy is less than 10 m,the communication success rate is more than 95％,the system is continuously running and lasts more than 4 hours,and the positioning is highly reliable.
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