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  2. Accelerometer - Wikipedia

    en.wikipedia.org/wiki/Accelerometer

    An accelerometer measures proper acceleration, which is the acceleration it experiences relative to freefall and is the acceleration felt by people and objects. [2] Put another way, at any point in spacetime the equivalence principle guarantees the existence of a local inertial frame, and an accelerometer measures the acceleration relative to that frame. [4]

  3. Inertial navigation system - Wikipedia

    en.wikipedia.org/wiki/Inertial_navigation_system

    Angular accelerometers measure how the vehicle is rotating in space. Generally, there is at least one sensor for each of the three axes: pitch (nose up and down), yaw (nose left and right) and roll (clockwise or counter-clockwise from the cockpit). Linear accelerometers measure non-gravitational accelerations [22] of the vehicle. Since it can ...

  4. Inertial measurement unit - Wikipedia

    en.wikipedia.org/wiki/Inertial_measurement_unit

    The accuracy of the inertial sensors inside a modern inertial measurement unit (IMU) has a more complex impact on the performance of an inertial navigation system (INS). [16] Gyroscope and accelerometer sensor behavior is often represented by a model based on the following errors, assuming they have the proper measurement range and bandwidth: [17]

  5. Every Hour-Long Walk Could Add 6 Hours to Your Life ... - AOL

    www.aol.com/lifestyle/every-hour-long-walk-could...

    An accelerometer is basically a fancy pedometer that tracks most kinds of movement, not just number of steps. ... data from previous well-designed studies was used to increase the accuracy of this ...

  6. PIGA accelerometer - Wikipedia

    en.wikipedia.org/wiki/PIGA_accelerometer

    PIGA accelerometers mounted in the AIRS (Advanced Inertial Reference Sphere) are part of the most accurate inertial navigation (INS) developed for the Peacekeeper missile. The INS drift rates are less than 1.5 x 10 −5 degrees per hour of operation, about 8.5 m per hour with the overall accuracy of the missile affected more by defects in the ...

  7. LN-3 inertial navigation system - Wikipedia

    en.wikipedia.org/wiki/LN-3_Inertial_Navigation...

    Singleton proposed to provide a system that would provide highly accurate pitch, roll, and yaw indicators. The system would be a north seeking stable platform controlled by gyroscopes and accelerometers. Such a system would automatically provide velocities in the east–west and north–south direction.

  8. Inertial reference unit - Wikipedia

    en.wikipedia.org/wiki/Inertial_reference_unit

    An inertial reference unit (IRU) is a type of inertial sensor which uses gyroscopes (electromechanical, ring laser gyro or MEMS) and accelerometers (electromechanical or MEMS) to determine a moving aircraft’s or spacecraft’s change in rotational attitude (angular orientation relative to some reference frame) and translational position (typically latitude, longitude and altitude) over a ...

  9. How accurate is your commercial fitness tracker? - AOL

    www.aol.com/accurate-commercial-fitness-tracker...

    In a 2019 study, 18 senior citizens took a stroll on some treadmills while armed to the hilt with fitness trackers. Commercial fitness trackers are being used for all kinds of things other than ...

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