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resources:eval:user-guides:inertial-mems:imu-overview [04 Aug 2021 02:42] – [Additional Resources!] Chas Frick | resources:eval:user-guides:inertial-mems:imu-overview [31 Aug 2021 22:00] (current) – [Linear Acceleration Effect (Linear-g), Linear Acceleration Effect on Bias, Linear-g Rejection (Linear-g Sensitivity)] Chas Frick | ||
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Can be approximated with the formula: ND ≅ ARW/60* √2 | Can be approximated with the formula: ND ≅ ARW/60* √2 | ||

- | ====== Linear Acceleration Effect (Linear-g) ====== | ||

- | Measured in degrees/ | ||

====== Vibration Rectification Error (VRE) ====== | ====== Vibration Rectification Error (VRE) ====== | ||

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====== Cross-Axis Sensitivity ====== | ====== Cross-Axis Sensitivity ====== | ||

- | Unintended effect where rotation/ | + | Unintended effect where rotation/. |

+ | Can be calculated from axis to axis misalignment error for accels/ | ||

- | ====== Linear-g Rejection (Linear-g Sensitivity) ====== | + | Example: For the ADIS16448, the accel axis to axis misalignment is 0.2 degrees. Therefore Cross-axis sensitivity accel is sin(0.2) = 0.197%. Gyro is sin(0.05) = 0.09%. Magnetometer:= 0.247% |

- | Unintended effect where linear acceleration is detected as rotation | + | |

+ | ====== Linear Acceleration Effect (Linear-g), Linear Acceleration Effect on Bias, Linear-g Rejection (Linear-g Sensitivity) ====== | ||

+ | Unintended effect where linear acceleration is detected as rotation. Measured in degrees/ | ||

+ | | ||

+ | ====== Vibration Rejection (Gyros) ====== | ||

+ | A combination of Linear-g and Vibration Rectification (VRE) specs. | ||

+ | | ||

+ | Vibration response of a gyro = Linear-g X-Axis Acceleration + (VRE X-Axis Acceleration)^2 | ||

====== Additional Resources! ====== | ====== Additional Resources! ====== |

resources/eval/user-guides/inertial-mems/imu-overview.txt · Last modified: 31 Aug 2021 22:00 by Chas Frick