Howtosignalprocessing
How do you calibrate an IMU sensor?
The simplest calibration of an IMU consists of calculating the offset for each axis of the gyroscope. The gyroscope is the easiest calibration due to the expected readings outputted under steady conditions. Each of the three axes of the gyro should read 0 degrees-per-second (dps, °/s) when the IMU is not moving.
How does IMU calibration work?
The method need previously calibrated IMU, called standard IMU. Standard IMU and IMU to be calibrated have to have a solid mechanical connection. Then a sequention of movement is done and an outputs from both IMUs are recorded simultaneously. Outputs can be recorded with different sampling frequency for each IMU.
How often do you calibrate an IMU?
Just like you should re-calibrate if you change locations, you should also calibrate your IMU every time you change elevation. 1000ft increments work best.
