Design of Signal Processing Platform for High-precision Inertial Navigation System Based on DSP and FPGA

In view of the middle-and-high Inertial Navigation System, which has the characteristic of small random drift and nonlinearity, wide dynamic range of output signal, and high precision, a high-precision inertial navigation signal processing platform based on DSP and FPGA was designed and implemented. The paper mainly discussed the timing logic design of AID sampling module, the interface design of key electrocircuit, the working flow of DSP, and the read-write of navigation data. And the platform has many characteristics such as simplifying design, high precision of data acquisition, excellent real-time performance, and good interface. Its effective accuracy is near to 18 bits, which is almost close to the practical effective accuracy of ADS1278. The application results shows that the platform satisfies the requirement of high-precision and high-reliability for Inertial Navigation System and Integrated Navigation System.