Influence of Sampling Rate on Wearable IMU Orientation Estimation Accuracy for Human Movement Analysis DOI Creative Commons
Bingfei Fan, Luobin Zhang, Shibo Cai

и другие.

Sensors, Год журнала: 2025, Номер 25(7), С. 1976 - 1976

Опубликована: Март 22, 2025

Wearable inertial measurement units (IMUs) have been widely used in human movement analysis outside the laboratory. However, IMU-based orientation estimation remains challenging, particularly scenarios involving relatively fast movements. Increased sampling rate has potential to improve accuracy, but it also increases power consumption and computational complexity. The relationship between frequencies accuracies unclear. We thus investigated specific influence of IMU frequency on across a spectrum speeds recommended sufficient rates. Seventeen healthy subjects wore IMUs their thigh, shank, foot performed walking (1.2 m/s) running (2.2 trials treadmill, motion testbed with an was mimic high-frequency cyclic movements up 3.0 Hz. Four sensor fusion algorithms computed orientations at 10, 25, 50, 100, 200, 400, 800, 1600 Hz were compared marker-based optical capture (OMC) determine accuracy. Results suggest that for is 100 Hz, 200 high-speed 400 accelerometer less important than gyroscope rate. Further, rates exceeding even resulted decreased accuracy because excessive updates using distorted accelerations angular velocity introduced more error merely velocity. These findings could serve as foundation inform wearable development or selection gait speeds.

Язык: Английский

Influence of Sampling Rate on Wearable IMU Orientation Estimation Accuracy for Human Movement Analysis DOI Creative Commons
Bingfei Fan, Luobin Zhang, Shibo Cai

и другие.

Sensors, Год журнала: 2025, Номер 25(7), С. 1976 - 1976

Опубликована: Март 22, 2025

Wearable inertial measurement units (IMUs) have been widely used in human movement analysis outside the laboratory. However, IMU-based orientation estimation remains challenging, particularly scenarios involving relatively fast movements. Increased sampling rate has potential to improve accuracy, but it also increases power consumption and computational complexity. The relationship between frequencies accuracies unclear. We thus investigated specific influence of IMU frequency on across a spectrum speeds recommended sufficient rates. Seventeen healthy subjects wore IMUs their thigh, shank, foot performed walking (1.2 m/s) running (2.2 trials treadmill, motion testbed with an was mimic high-frequency cyclic movements up 3.0 Hz. Four sensor fusion algorithms computed orientations at 10, 25, 50, 100, 200, 400, 800, 1600 Hz were compared marker-based optical capture (OMC) determine accuracy. Results suggest that for is 100 Hz, 200 high-speed 400 accelerometer less important than gyroscope rate. Further, rates exceeding even resulted decreased accuracy because excessive updates using distorted accelerations angular velocity introduced more error merely velocity. These findings could serve as foundation inform wearable development or selection gait speeds.

Язык: Английский

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