Error correction method for geomagnetic vector measurement system based on Lagrange multiplier method
A measurement system and error correction technology, applied in the field of magnetic measurement, can solve problems such as reducing the accuracy of error calibration, failing to meet the requirements of geomagnetic vector measurement accuracy, and affecting the accuracy of parameter estimation.
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[0074] Below, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0075] 1. The simulation conditions are set, and the simulation test of the present invention is carried out.
[0076] 1) Set the geomagnetic field vector in the test area as B e =[35200-33155-2000]nT (under the geographic coordinate system, according to the global geomagnetic model, the projection vector value of the geomagnetic field vector under the geographic coordinate system can be calculated); the proton magnetometer measures the total amount of geomagnetism above the non-magnetic platform for T e =48397nT.
[0077] 2) According to prior knowledge, preset the values of some parameters in the measurement system (in the magnetic sensor coordinate system), specifically:
[0078] 3) The Euler angles between the magnetic coordinate system and the inertial navigation coordinate system are: [α 0 beta 0 gamma 0 ]=[8-5 3] degrees.
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