Howtosignalprocessing
- How do you calculate angular random walk?
- What is angle random walk?
- What causes angular random walk?
- What is gyro scale factor?
How do you calculate angular random walk?
At 1 sec the value of the square-root of the AllanVariance is 15 deg/hr. This leads to a value of the Angular Random Walk (ARW) of 15/60 deg/sqrt(hr) = 0.25 deg/sqrt(hr) = 0.0042 deg/s/sqrt(Hz) = 15 deg/hr/sqrt(Hz) [white gyro noise assumed].
What is angle random walk?
Angle Random Walk (ARW) is the noise component perturbing the output of Fiber Optic Gyro (FOG). Allan Variance method is adopted to identify the ARW of particular FOG before and after thermal-inertial calibration. The reduction in ARW from 28% to 60% is observed experimentally.
What causes angular random walk?
Random Walk
If a noisy output signal from a sensor is integrated, for example integrating an angular rate signal to determine an angle, the integration will drift over time due to the noise. This drift is called random walk, as it will appear that the integration is taking random steps from one sample to the next.
What is gyro scale factor?
Scale Factor is a ration of input (angular velocity) and output value. The deviation of the scale factor to the ideal output is called scale factor error, which is normally displayed in percentage (%).
