Ground speed testing methods suitable for optical fibre gyroscope strap-down inertial navigation system
A strapdown inertial navigation and fiber optic gyro technology, which is applied to Sagnac effect gyroscopes and navigation through speed/acceleration measurement, can solve the problems of the system's ground speed detection accuracy, etc., to reduce the amount of calculation and save money Resources, the effect of improving the output accuracy of ground speed
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[0029] The ground speed detection method suitable for the fiber optic gyro strapdown inertial navigation system described in this embodiment, the specific steps are as follows:
[0030] Step 1, determining the position parameters of the carrier and the initial ground speed value through external equipment;
[0031] Step 2, the strapdown inertial navigation system performs initial alignment, and determines the initial attitude of the carrier relative to the navigation coordinate system n;
[0032] Step 3. Determine the ground speed update period H=t m -t m-1 , the ground speed update period H is equal to the rowing compensation period; H is set to N times the inertial sensor sampling period, and the N is an integer greater than 0;
[0033] Step 4. Collect the specific force signal f output by the quartz accelerometer and the angular velocity signal ω output by the fiber optic gyroscope, and calculate the projection Δv of the velocity increment of the carrier relative to the i...
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