MEMS inertial measurement unit with crossing axis coupling error compensation

Abstract

The invention discloses an MEMS inertial measurement unit with crossing axis coupling error compensation. The MEMS inertial measurement unit comprises three axial MEMS analog output gyroscopes and signal collecting circuits thereof, three axial MEMS digital output accelerometers and signal collecting circuits thereof, a gyroscope data conversion module, a crossing axis coupling error compensation module, a serial port communication circuit and a power supply configuration circuit, wherein the three axial MEMS analog output gyroscopes and the signal collecting circuits thereof are used for realizing the collection of gyroscope signals; the three axial MEMS digital output accelerometers and signal collecting circuits thereof are used for realizing the collection of accelerometer output signals; the gyroscope data conversion module is used for realizing the analog-digital conversion of the gyroscope data; the crossing axis coupling error compensation module is used for realizing the data treatment for the analog output gyroscopes and the digital output accelerometers; the serial port communication circuit is used for realizing the communication with an upper computer; the power supply configuration circuit is used for supplying various power supplies to the whole measurement unit. The MEMS inertial measurement unit not only can realize the collection of the carrier six-axis position information but also can eliminate the crossing axis coupling error caused by processing and mounting.

Description

Technical field [0001] The invention relates to a MEMS inertial measurement unit with cross-axis coupling error compensation, belonging to the technical field of MEMS inertial navigation. Background technique [0002] With the development of technology, the accuracy of MEMS inertial measurement unit is continuously improved, and because of its small size, low power consumption, and low cost, it has been widely used in more and more fields. The development of MEMS inertial measurement unit has extremely high value to the national economy and national defense construction. [0003] The first MEMS inertial measurement unit was launched in 1994 by the Draper laboratory in the United States. With the continuous advancement of technology, the integration of MEMS inertial measurement units is getting higher and higher, the volume is gradually decreasing, and the accuracy is getting higher and higher. The products that have been commercialized at present mainly include the HG-1910 of Hone...

AI Technical Summary

Problems solved by technology

[0004] Affected by processing technology and installation, MEMS inertial measurement units will have cross-axis coupling errors, which seriously affect the output accuracy of the system. Therefore, establishing a cross-axis coupling model to compensate for errors is also the focus of MEMS inertial measurement unit development technology

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