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Gyroscope vector magnitude: A proposed method for measuring angular velocities
Howard Chen1, Mark C Schall2, Nathan B Fethke3
1Industrial & Systems Engineering and Engineering Management Department, The University of Alabama in Huntsville, Huntsville, AL, USA; Department of Mechanical Engineering, Auburn University, Auburn, AL, USA.
Applied Ergonomics
|February 5, 2023
Summary
High upper arm angular velocity increases musculoskeletal disorder risk. A new Gyroscope Vector Magnitude (GVM) method better quantifies this velocity than existing methods, improving risk assessment.
Area of Science:
- Biomechanics
- Occupational Health
- Ergonomics
Background:
- High movement velocities are a key risk factor for work-related musculoskeletal disorders (MSDs).
- Current methods using inertial measurement units (IMUs) for upper arm angular velocity lack comprehensive measurement.
- Existing methods include generalized velocity and inclination velocity, which do not fully capture angular motion.
Purpose of the Study:
- To introduce and validate a new method, Gyroscope Vector Magnitude (GVM), for accurately calculating upper arm angular velocity.
- To compare the effectiveness of GVM against traditional methods.
Main Methods:
- Utilized inertial measurement units (IMUs) with accelerometers and gyroscopes.
- Developed the Gyroscope Vector Magnitude (GVM) calculation.
- Validated GVM against optical motion capture data.
Main Results:
- The proposed Gyroscope Vector Magnitude (GVM) method captures angular velocities across all motion axes.
- GVM more accurately represents the true upper arm angular velocity compared to existing methods.
- Traditional methods captured only 89% and 77% of the angular velocity measured by GVM.
Conclusions:
- The Gyroscope Vector Magnitude (GVM) method offers a more accurate representation of upper arm angular velocity.
- This improved measurement can lead to better identification and mitigation of MSD risk factors.
- GVM enhances the assessment of occupational biomechanics and ergonomic interventions.
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