• Multi-Position Calibration : Place the IMU in various static orientations (e.g., 6 or 12 positions) to map accelerometer errors (bias/scale factor) using gravity as a reference (
  

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• Gyroscope Calibration : Once the accelerometer is calibrated, rotate the sensor to estimate gyroscope errors, often using integrating angular velocity between static points.
• Thermal Calibration : Subject the IMU to varying temperatures in a climate chamber to create a compensation model that corrects for thermal drift in real-time.
• Axis Alignment (Orthogonalization) : Calculate transformation matrices to correct for misalignment between the sensor axes and the device body.
• Low-Cost/Field Calibration : Use a 3D-printed cube to hold the sensor in precise orientations without requiring expensive rate tables.
• Rotation Modulation : Use continuous or periodic rotation to self-compensate for bias drift.

• Stable Data Capture: Ensure the IMU remains perfectly still during static sampling.
• Temperature Stability: Perform calibration in a thermally stable environment, or specifically map temperature against sensor output.
• Duration: For high-precision requirements, record data for 15–24 hours.
• Environmental Cleanup: Ensure no magnetic interference is present, particularly for magnetometer-included IMUs.

Error Compensation Method for Pedestrian Navigation System ...

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National Institutes of Health (NIH) | (.gov)

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May 17, 2022 — Nowadays, rotation modulation technology is the primary method to realize the self-compensation of errors in the SINS, which can s...

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A robust and easy to implement method for IMU calibration without external equipments

It assumes that: * The magnitude of gravity is locally stable * The temperature is stable The method involves the following steps:

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Aug 8, 2024 — IV. IMU Intrinsic Calibration Method: * we are assuming the IMU measurement error model used here is derived from a sensor that do...

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3m

Hardware prep & ground control: IMU, compass & calibrations

YouTube · Propeller