Strapdown Inertial / Gnss Integrated Navigation System Test Platform

Integrated navigation system provides the navigate information of position to the airplane, it is the important equipment for airplane safety flight. This artical analyses the function,external connection and output signal of the SINS/ GNSS Integrated navigation system, puts forward the method of setting up a test platform, and then studies the methods of the key technique for soft and hardware. This artical provides a success example for the establishment of other test platforms .The test platform based on the computer hardware platform adopts the virtual instrument technique, the signal connection and task management is completed by the computer. The software which adops the Labview program language achieves the fuction of system test, fault examination ,user management,system maintenance and report managment. The test platform designded has the characteristics of operation simple and function well-found, and it can be good to satisfy the request of the user.In the hardware design, the collection of simulation quantity and disperse quantity is analysed ,and then the examples are gived. In this part,the disign of state selector is studied, and the design of Arinc429 bus based on ISA bus is espically researched. At last, anti- interference and the design of defenging mistake is analysed.Whether virtual instrument test system can run well is decided by the software in a large extent. The software structure of the virtual instrument is analysed and then the realization of each software layer is explained; After that, the application of the VISA system is sudied, and espially the establishment of instrument drive and the application of DLL is studied. Also multitask systems which is important to the efficiency and validity of software is anlysed.The fault examination and fault diagnosation is more and more important in the test system. This artical puts forward the application of the system BIT, and then studies the fault examination theories based on expert system.The test platform studied in this aritical is flexibility and can apply to other test syatem with a little modify.