A MEMs inertial group calibration method based on fiber inertial assistance
A calibration method and inertial assisted technology, applied in the aerospace field, can solve the problems of high manual rotation accuracy requirements, complete calibration parameters, calibration accuracy and reliability need to be improved, etc. Cost, flexible operation effect
Active Publication Date: 2021-02-19
CENT SOUTH UNIV
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Problems solved by technology
This test method proposes a device-level calibration method for MEMS gyroscopes, which is only applicable to the estimation of gyroscope error terms. In addition, this operation method has high requirements for manual rotation accuracy, and has poor performance in terms of completeness of calibration parameters, calibration accuracy, and reliability. needs improvement
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[0043] A MEMS inertial calibration method based on optical fiber inertial assistance, comprising the following steps: the first step, installing the optical fiber inertial and MEMS inertial, specifically: installing the MEMS inertial and the calibrated optical fiber inertial together through tooling , lock, connect the cables between the optical fiber inertial group, MEMS inertial group, power supply and acquisition computer and check for correctness; the second step, preheat the optical fiber inertial group and MEMS inertial group until stable; the third step, turn on the acquisition computer According to the set path, the data of the optical fiber inertial group and the MEMS inertial group are collected, and the device error is estimated in the whole process; the fourth step is to output the estimated result of the device error as the calibration result; the inertial group is powered off, and the system is disconnected Electricity.
[0044] Details are as follows:
[0045] ...
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The invention provides a MEMS inertial group calibration method based on optical fiber inertial assistance, comprising the following steps: the first step, installing the MEMS inertial group and the marked optical fiber inertial group; the second step, preheating the optical fiber inertial group and the MEMS inertial group To be stable; the third step is to collect the data of the optical fiber inertial group and the MEMS inertial group according to the set path, and estimate the device error in the whole process; the fourth step is to output the estimated result of the device error as the calibration result. Applying the calibration method of the present invention, the effect is: the present invention adopts the combination of the optical fiber inertial group and the MEMS inertial group, can complete the one-time calibration of all parameters of the MEMS inertial group, and makes up for the current calibration method for MEMS inertial group calibration without a turntable. Inadequacies in implementability; the present invention uses a low-cost optical fiber inertial navigation system to replace a high-precision turntable, and does not need other auxiliary devices, does not require accurate manual rotation, and is more flexible in operation, and can greatly reduce the cost.
Description
technical field [0001] The invention relates to the field of aerospace technology, in particular to a MEMS inertial group calibration method based on optical fiber inertial assistance. Background technique [0002] Due to its small size, low cost, simple structure, and autonomous navigation, the fiber optic inertial navigation system is widely used in military and civilian navigation, guidance and control systems. Micro-electro-mechanical system (MEMS) sensors have the characteristics of small chip size, light weight, low power consumption, and high reliability. MEMS inertial systems can provide information on attitude, speed, and position in mobile phones, watches, drones, weapons, etc. Navigation applications play an important role. [0003] Inertial group calibration is a necessary step before navigation application, and its calibration effect directly affects the accuracy of the system. [0004] In the traditional MEMS calibration method, a high-precision turntable is ...
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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 芦佳振叶莉莉郑钧璟韩松来桂明臻
Owner CENT SOUTH UNIV