Howtosignalprocessing
- What is gyro bias stability?
- What is bias in-run stability?
- How accurate is a gyro?
- How do you calculate gyro bias?
What is gyro bias stability?
Grading Performance in Gyros
A bias stability measurement tells you how stable the bias of a gyro is over a certain specified period of time. In general, the lower the bias stability the lower the errors will be when integrating the gyro output over time.
What is bias in-run stability?
The in-run bias stability, or often called the bias instability, is a measure of how the bias will drift during operation over time at a constant temperature. This parameter also represents the best possible accuracy with which a sensor's bias can be estimated.
How accurate is a gyro?
Gyroscopes of this type can be extremely accurate and stable. For example, those used in the Gravity Probe B experiment measured changes in gyroscope spin axis orientation to better than 0.5 milliarcseconds (1.4×10−7 degrees, or about 2.4×10−9 radians) over a one-year period.
How do you calculate gyro bias?
Equation (13) shows that the attitude angle from the gyroscope is obtained by adding an angle change caused by the deviation of the true value of the attitude angle. Therefore, the gyro bias, wbi, is estimated by knowing the true value, q k + 1 r , of the attitude at any time.
