MIMU (Micro Inertial Measurement Unit) system with ECEF (Earth Centered Earth Fixed) model

Abstract

The invention discloses a Micro Inertial Measurement Unit (MIMU) system with an Earth Centered Earth Fixed (ECEF) model, which comprises a signal conditioning module (1), a modulus conversion module (2), a smooth filtering module (3), a mode setting module (4), an error model module (5), a mode decoding module (6), an ECEF model (7), an inertia and GPS (Global Positioning System) synchronizing information generation module (8) and a state control character generation module (9); the MIMU system is an embedding type platform based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) processor, and the high-speed convergence of the speed and the position of inertia data can be realized based on GPS data. In the invention, the converged data can assist the track of a GPS receiver on a loop and improve the relative bandwidth of the tracked loop so that the interference resistance of the GPS receiver is improved.

Description

technical field [0001] The present invention relates to a miniature inertial measurement unit (MIMU) system, more particularly, a MIMU system with an ECEF model, and a method for assisting a GPS tracking loop with the MIMU system of the present invention. Background technique [0002] Miniature inertial measurement unit (MIMU, miniature inertial measurement unit) is an important MEMS, which is composed of miniature gyroscope, miniature accelerometer, application specific integrated circuit (ASIC), embedded microcomputer and corresponding navigation software, which can provide motion The position, velocity and attitude information of the carrier. [0003] "Computer and Digital Engineering" published in the 2nd issue of 2010 and the 244th issue "Research on Strapdown Inertial Navigation Algorithm in Beidou Double Star / SINS Integrated Navigation". in the article's figure 1 A strapdown inertial navigation system (INS) formed by a computer, a navigation computer, a control disp...

AI Technical Summary

Problems solved by technology

The fused data of the present invention can assist the GPS receiver to track the loop, and improve the relative bandwidth of the tracking loop, thereby improving the anti-interference ability of the GPS receiver; meanwhile, the MIMU system designed by the present invention also solves the problem of optical fiber inertial navigation assistance. Problems of large volume and high cost of GPS receiver platform

Images