in the process of FOG startup.The larger the temperature change is,the larger the scale factor error in the process of FOG startup is.The maximum scale factor error is up to 0.048,0.0144,0.025 when the temperature is -20,50,70 ℃,and the startup time is up to 6,7,11 srespectively...
Scale Factor ErrorThe paper considers the problem of improving the accuracy of gyro stabilized system of airborne gravimeter during the survey. To reduce the stabilization error, a time-varying correction algorithm is proposed, which accounts for the heading error during the maneuver. Performance of ...
Means to correct scale factor in the phase-nulling optical gyro are presented. In particular, methods are described that allow the wavelength of the light source to be tracked to high accuracy. A derivative of this technique, allowing the phase-nulling optical gyro to execute an in-flight cold...
All low and moderate cost MEMS gyros exhibit some time-zero null bias and scale factor errors, as well as some variation over temperature. Therefore, it is common practice for users to temperature compensate them. Generally speaking, gyros contain integrated temperature sensors just for this purpose...
We measured the scale factor error of a typical Epson gyro sensor. The data is shown in the graph below. The gyro sensor exhibits outstanding scale factor stability over temperature because the driving arm and sensing arm can be formed on the same crystal plane of the quartz material, and pl...
Experiments are carried out on a set of dual-axis RINS based on fiber optic gyroscope, and the scale factor asymmetry calibration results of three gyros are 2.56 ppm, 10.01 ppm and 0.88 ppm, respectively. In the navigation experiment, the navigation error is improved by 57.45% after ...
Scale factor error 0.37% 0.32% 0.50% Bias uncertainty 0.001/s 0.001/s 0.002/s Angle random walk 0.41/ 0.39/ 0.33/ Temperature -40～75℃ -40～75℃ -40～75℃ 表1.4 JAE公司光纤陀螺性能 Parameters JG-108F JG-35F JG-34F JG-52F Bias stability 5/hr 0.5/hr 0.5/hr 0.02/hr Scale factor...
The precision of azimuth angle is studied by analyzing its influence factor and establishing the scale factor error model and drift models of fiber optic gyro and the measurement error model of photoelectric encoder. Correction for fiber optic gyro and photoelectric encoder based on their mutual ...
其中V0是零点漂移值,ScaleFactor是感度因子,V是当前输出电压。一般使用GYRO攫I量 角速度是为了计算方位角的变化,由角速度按时间进行积分就可以得到方向上的变化 f_ 联r)=I盯(t)dt(1.3) 0 推算航法的优点是,能够持续的得出连续的行驶轨迹。缺点是,由于传感器存在误差, 故在积算自车位置中误差是不断积累的。
(Joyce, 1989; Pollard and Read, 1989) provided a velocity scale factor and constant angular offset between the transducer and the Ashtech antenna array. Heading accuracy is 0.1° or better, leading to uncertainty of 1cms−1in the cross-track velocity component. This bias, while of small ...