Angle random walk units

Angle random walk (ARW) is a noise specification, in units of deg/hr1/2, that is directly applicable to angle calculations. ARW describes the average deviation or error that will occur when you integrate the signal.

1. What is angle random walk?
2. How do you find the angle of a random walk?
3. What is gyro range?
4. What is gyro scale factor?

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.

How do you find the angle of a 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 gyro range?

Typical gyroscope full ranges are 450, 1000 and 2500 deg/s. A full range of 450 deg/s is sufficient for most industrial applications, such as maritime applications, satellite stabilization and camera stabilization.

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 (%).