The invention relates to a high precision micro-electromechanical combined inertial navigation unit which comprises a global positioning system (GPS) receiving module, an angular velocity sensor, an acceleration sensor, low pass filters connected with the acceleration sensor, high-speed analog-digital conversion modules, a digital signal processor comprising software program, and a corresponding power supply; the high precision micro-electromechanical combined inertial navigation unit is characterized by further comprising a field-programmable gate array (FPGA); three axes of micromechanical gyroscopes are respectively connected with the corresponding high-speed analog-digital conversion modules by the low pass filters; three axes of micromechanical accelerometers are respectively connected with the corresponding high-speed analog-digital conversion modules by the low pass filters, and are respectively connected with the FPGA. The FPGA can be programmed into a plurality of communication interfaces and digital filters, and all the functions in the FPGA can be completed in parallel. The GPS receiving module is directly connected with the FPGA. The high precision micro-electromechanical combined inertial navigation unit is small in volume, light in weight, good in real-time performance, low in cost and high in accuracy.
High precision micro-electromechanical combined inertial navigation unit