Method for calibrating combined error coefficient of accelerometer under condition of reference uncertainty
A technology of accelerometer and combined error, applied in the direction of measuring devices, instruments, etc., can solve the problems of time-consuming and laborious, limited calibration conditions, unfavorable rapid calibration, etc.
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[0092] Since the accelerometer combination calibration requires high-precision horizontal and azimuth references, using this method can reduce the accuracy requirements of the references when the inertial measurement system is calibrated. The test process flow chart of the inventive method is as figure 1 As shown, the data processing flow chart is as follows figure 2 As shown, the specific steps are as follows:
[0093] 1. Install the strapdown inertia combination on the double-axis rotating mechanism, such as image 3 shown. Adjust the swivel mechanism so that the strapdown inertial combination rests in 16 different positions. The installation datum of the biaxial rotary mechanism does not need to be known precisely. And the 16 positions of the strapdown inertial measurement system are:
[0094] Position 1: Adjust the rotation mechanism so that the strapdown inertial combination is still at an arbitrary position, and record the rotation angle α(1) of the inner frame and...
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