Nine-top MEMS (micro-electro mechanical system) inertial measuring device based on orthogonal rotation

Abstract

The invention belongs to the technical field of inertial navigation, and particularly relates to a nine-top MEMS (micro-electro mechanical system) inertial measuring device based on orthogonal rotation. The nine-top MEMS inertial measuring device based on orthogonal rotation includes three groups of tops, namely a first orthogonal top group, a second orthogonal top group, and a third orthogonal top group, wherein the first orthogonal top group coincides with a carrier coordinate system of the device; the spatial relationship of the three groups of tops can be obtained by successive anti-clockwise rotations of the carrier coordinate system around a vector S. Compared with a nine-top octadecahedron configuration scheme in the prior art, the nine-top MEMS inertial measuring device based on orthogonal rotation provided by the invention has the advantage that any three of the tops in the device are not co-planar, and the reliability is equivalent to that of seven sets of non-redundant inertial navigation systems, so that the system reliability is further improved.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation, in particular to a nine-gyro MEMS inertial measurement device based on orthogonal rotation. technical background [0002] The micro inertial measurement unit composed of inertial devices of micro-electro mechanical systems (MEMS) has the advantages of strong autonomy, small size, light weight, low cost and strong impact resistance. By increasing the number of sensitive components Redundant configuration is currently the most mainstream method to improve system reliability and accuracy. Installing the sensitive elements in a certain combination can improve the redundancy of each axis of the inertial measurement unit, and can use repeated measurement data to improve navigation accuracy. Wang Jingxian and others of Aviation Industry Corporation of China designed an octadecahedron configuration scheme for the nine gyroscopes. Its reliability is equivalent to six sets of non-redundant ine...

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Problems solved by technology

AVIC Wang Jingxian and others designed an octadecahedron configuration scheme for the nine gyroscopes, whose reliability is equivalent to six sets of non-redundant inertial navigation systems. The reliability of the system has not reached the highest (Wang Jingxian, Zhang Minghui "A Highly Reliable Strapdown Inertial Measurement Unit Layout", Chinese Journal of Inertial Technology, June 2012, Volume 20, Issue 3)

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