S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Journal Papers (저널논문_기계항공공학부)
Drift error analysis caused by RLG dither axis bending
- Kim, Kwangjin; Park, Chan Gook
- Issue Date
- Sensors and Actuators A 133(2) (2007).
- In this paper, a drift error equation caused by the flexure of ring laser gyroscope (RLG) mechanical dither is derived for analyzing the effect on system performance in the presence of input acceleration. To separate the effects of dithering rate motion and vehicle rate motion, the flexure error is classified as sensor level error if the sensing axis coincides with the dithering axis and as system level error if the two axes do not coincide. The drift error is then derived by using the relationship between gyro output and the rotation vector. These equations show that RLG-based INS
attitude error caused by the flexure is directly proportional to time, the amount of input acceleration and the dynamic frequency of the vehicle.
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