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    Measurement Error and Calibration of FOG IMU


    Medium · Ericco Inertial Technology
    1 year ago
    Medium · Ericco Inertial Technology
    1 year ago
    Traditional IMU calibration methods include static multi-position calibration under normal temperature environment , angular rate calibration and ... Read more
    fog imu calibration and testing procedures from medium.com
    Missing: testing ‎ procedures

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    Drone IMU Calibration Explained - Pilot Institute
    FOG IMU calibration involves using a high-precision, temperature-controlled, multi-axis turntable to determine, model, and compensate for sensor errors like bias, scale factor, non-orthogonality, and
    g g
    𝑔
    -dependent drift. Procedures typically include a 12-position or 3-axis rotation method (e.g., positive/negative rates) to calibrate accelerometers and gyros, often utilizing Kalman filtering for high-precision,, 27-dimension parameter identification across various temperature points.
    Key Calibration and Testing Procedures
    • System Error Modeling & Setup: The process begins by defining the mathematical model of the FOG IMU error, which includes bias, scale factor, and non-orthogonality, as well as inner lever-arm parameters.
    • Temperature Calibration: Because FOG sensors are sensitive to temperature, the IMU is placed on a turntable within a temperature chamber to calibrate across a full temperature range.
    • Multi-Position/Rate Testing:
      • 12-Position Method : A common method where the IMU is placed in 12 specific orientations to calibrate, often used for improving accuracy.
      • Tripartite Positive/Negative Rate Method : The IMU is placed on a single-axis turntable, rotating 360° in both directions for each axis (X, Y, Z) to determine precise bias and scale factors.
      • Dynamic/Static Hybrid Approach : Combines static positions for initial calibration with dynamic turntable movements to identify non-linear and coupling errors.
    • Data Acquisition and Processing: The IMU's raw output data is recorded during these movements, often involving 27-dimension Kalman filtering to estimate errors.
    • Compensation: The identified error parameters are used to generate compensation algorithms, such as Piecewise Linear Interpolation (PLI), to correct the output data.
    Testing Procedures
    • Static Test: The IMU is kept stationary to measure stability, zero bias, and white noise (Allan Variance Analysis).
    • Rate Table Test: Measures scale factor accuracy and nonlinearity by subjecting the IMU to known angular rates.
    • Environmental Testing: Testing for performance under vibration, shock, and thermal cycling.
    Key Parameters Calibrated
    • Gyros: Bias, Scale Factor,
      g g
      𝑔
      -sensitive drift, Axis Non-orthogonality.
    • Accelerometers: Bias, Scale Factor, Non-linear parameters, Axis Non-orthogonality.
    • Lever Arm: The distance between the navigation frame center and the IMU center.
    (PDF) A hybrid grading calibration method for FOG strapdown IMU
    Aug 5, 2025 — In view of these problems, this paper proposes a high precision FOG hybrid grading calibration method using low-cost turntable. Co...
    ResearchGate
    Measurement Error and Calibration of FOG IMU - Medium
    Feb 28, 2024 — According to the mathematical model of system error, a FOG IMU tripartite positive and negative rate/one position error calibratio...
    Medium
    A novel hybrid calibration method for FOG-based IMU - ScienceDirect
    It divides the whole process into two steps: the coarse calibration and the fine calibration. The coarse calibration allows the sy...
    ScienceDirect.com
    Improving the calibration process of inertial measurement unit ...
    To calibrate an IMU, five steps must be taken, shown in Figure 1. In the first step, the mathematical model of the sensor output (
    The Institute of Navigation
    IMU calibration method and calibration process
    Apr 10, 2024 — Accurate calibration of the IMU is of great significance for improving the navigation and positioning accuracy of the system. The ...
    Ericco Inertial Technology
    IMU Calibration Using 12-position Method - Ericco Inertial Technology
    Apr 12, 2024 — Summarize. As a commonly used IMU calibration method, the 12-position method can effectively improve the accuracy and reliability ...
    Ericco Inertial Technology
    Optimal Inner Lever-arm Parameters Calibration Method of High- ...
    * arm. parameter. * As shown in Fig.1, the mounting limits of the three. * accelerometers relative to the FOG-IMU center point are...
    The Institute of Navigation
    FOG IMU calibration - Micro-Magic Inc
    Apr 17, 2025 — Explore high-precision calibration for FOG IMU (Fiber Optic Gyro Inertial Measurement Unit) across full temperature ranges. Learn ...
    www.memsmag.com
    • (PDF) A hybrid grading calibration method for FOG strapdown IMU
      Aug 5, 2025 — In view of these problems, this paper proposes a high precision FOG hybrid grading calibration method using low-cost turntable. Co...
      ResearchGate
    • Measurement Error and Calibration of FOG IMU - Medium
      Feb 28, 2024 — According to the mathematical model of system error, a FOG IMU tripartite positive and negative rate/one position error calibratio...
      Medium
    • A novel hybrid calibration method for FOG-based IMU - ScienceDirect
      It divides the whole process into two steps: the coarse calibration and the fine calibration. The coarse calibration allows the sy...
      ScienceDirect.com
    • Improving the calibration process of inertial measurement unit ...
      To calibrate an IMU, five steps must be taken, shown in Figure 1. In the first step, the mathematical model of the sensor output (
      The Institute of Navigation
    • IMU calibration method and calibration process
      Apr 10, 2024 — Accurate calibration of the IMU is of great significance for improving the navigation and positioning accuracy of the system. The ...
      Ericco Inertial Technology
    • IMU Calibration Using 12-position Method - Ericco Inertial Technology
      Apr 12, 2024 — Summarize. As a commonly used IMU calibration method, the 12-position method can effectively improve the accuracy and reliability ...
      Ericco Inertial Technology
    • Optimal Inner Lever-arm Parameters Calibration Method of High- ...
      * arm. parameter. * As shown in Fig.1, the mounting limits of the three. * accelerometers relative to the FOG-IMU center point are...
      The Institute of Navigation
    • FOG IMU calibration - Micro-Magic Inc
      Apr 17, 2025 — Explore high-precision calibration for FOG IMU (Fiber Optic Gyro Inertial Measurement Unit) across full temperature ranges. Learn ...
      www.memsmag.com
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    IMU calibration method and calibration process


    Ericco Inertial Technology
    https://www.ericcointernational.com › application › imu...
    Ericco Inertial Technology
    https://www.ericcointernational.com › application › imu...
    Apr 10, 2024 — The calibration methods of IMU are mainly divided into two categories: static calibration and dynamic calibration . Static calibration is mainly ... Read more
    5.0 (820)
    Missing: procedures ‎| Show results with: procedures

    FOG IMU calibration


    memsmag.com
    https://www.memsmag.com › fog-imu-calibration
    memsmag.com
    https://www.memsmag.com › fog-imu-calibration
    Apr 17, 2025 — Explore high-precision calibration for FOG IMU (Fiber Optic Gyro Inertial Measurement Unit) across full temperature ranges. Read more
    Missing: procedures ‎| Show results with: procedures

    Improving the calibration process of inertial measurement ...


    The Institute of Navigation
    https://navi.ion.org › content
    The Institute of Navigation
    https://navi.ion.org › content
    by H Rahimi · 2020 · Cited by 7 — To calibrate an IMU, five steps must be taken , shown in Figure 1. In the first step, the mathematical model of the sensor output (generally, the IMU) is ... Read more

    A novel hybrid calibration method for FOG-based IMU


    ScienceDirect.com
    https://www.sciencedirect.com › science › article › pii
    ScienceDirect.com
    https://www.sciencedirect.com › science › article › pii
    by B Xu · 2019 · Cited by 22 — Combination method of coarse and accurate calibration is used to realize high precision calibration of FOG - IMU sensors. First of all, the system parameters ... Read more
    Missing: testing ‎ procedures

    When Should You Recalibrate or Replace a FOG IMU?


    GuideNav
    https://guidenav.com › blog › when-should-you-recalib...
    GuideNav
    https://guidenav.com › blog › when-should-you-recalib...
    Recalibration is a controlled, multi-step process that restores the IMU's original accuracy by removing accumulated bias, temperature drift, and alignment ...

    A hybrid grading calibration method of FOG-IMU and its ...


    IEEE Xplore
    https://ieeexplore.ieee.org › document
    IEEE Xplore
    https://ieeexplore.ieee.org › document
    by J Chang · 2017 — Firstly, system parameters are calibrated by the discrete calibration method, in which the effects of the lever-arm are considered. Secondly, sensors' ... Read more
    Missing: testing ‎ procedures

    Inertial Measurement Unit (IMU) – An Introduction


    Advanced Navigation
    https://www.advancednavigation.com › Tech Articles
    Advanced Navigation
    https://www.advancednavigation.com › Tech Articles
    Feb 13, 2023 — Typically, static interference can be measured via performing a set of calibration procedures after the unit has been installed. The process ... Read more
  • The Technology Behind IMU...
  • IMU Calibration
  • Interpreting Inertial...

    • A Method for Improving the Precision of FOG Scaling ...


    IOPscience
    https://iopscience.iop.org › article › pdf
    IOPscience
    https://iopscience.iop.org › article › pdf
    by Y Zhang · 2023 — The purpose of IMU calibration is to determine the scale factor, installation error angle, constant drift , and other relatively fixed error ... Read more
    Missing: procedures ‎| Show results with: procedures

    A Complete Guide to Inertial Measurement Unit (IMU)


    JOUAV
    https://www.jouav.com › blog › inertial-measurement-u...
    JOUAV
    https://www.jouav.com › blog › inertial-measurement-u...
    Apr 17, 2025 — Calibrating an IMU involves a series of steps to ensure accurate and reliable sensor readings. Begin by placing the IMU on a stable surface to ... Read more

    Scholarly articles for fog imu calibration and testing procedures

    A novel hybrid calibration method for FOG -based IMU - ‎ Xu - Cited by 22
    A new calibration method of MEMS IMU plus FOG IMU - ‎ Lu - Cited by 38
    In-field fast calibration of FOG -based MWD IMU for … - ‎ Li - Cited by 27

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