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Subject- and Environment-Based Sensor Variability for Wearable Lower-Limb Assistive Devices
by
Krausz, Nili E
, Hu, Blair H
, Hargrove, Levi J
in
Adult
/ Algorithms
/ assistive robotics
/ Biosensing Techniques
/ Clustering
/ computer vision
/ Data acquisition systems
/ Data collection
/ Electromyography
/ environmental sensing
/ Exoskeletons
/ Experiments
/ Female
/ Gait
/ Gait - physiology
/ Humans
/ Inertial platforms
/ intention detection
/ Kinematics
/ Kinetics
/ Locomotion
/ Locomotion - physiology
/ Lower Extremity - physiology
/ Machine learning
/ Male
/ Prostheses
/ Prosthesis Implantation
/ prosthetics
/ Reproducibility
/ sensor fusion
/ Sensors
/ Vision
/ Wearable Electronic Devices
/ Young Adult
2019
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Subject- and Environment-Based Sensor Variability for Wearable Lower-Limb Assistive Devices
by
Krausz, Nili E
, Hu, Blair H
, Hargrove, Levi J
in
Adult
/ Algorithms
/ assistive robotics
/ Biosensing Techniques
/ Clustering
/ computer vision
/ Data acquisition systems
/ Data collection
/ Electromyography
/ environmental sensing
/ Exoskeletons
/ Experiments
/ Female
/ Gait
/ Gait - physiology
/ Humans
/ Inertial platforms
/ intention detection
/ Kinematics
/ Kinetics
/ Locomotion
/ Locomotion - physiology
/ Lower Extremity - physiology
/ Machine learning
/ Male
/ Prostheses
/ Prosthesis Implantation
/ prosthetics
/ Reproducibility
/ sensor fusion
/ Sensors
/ Vision
/ Wearable Electronic Devices
/ Young Adult
2019
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Subject- and Environment-Based Sensor Variability for Wearable Lower-Limb Assistive Devices
by
Krausz, Nili E
, Hu, Blair H
, Hargrove, Levi J
in
Adult
/ Algorithms
/ assistive robotics
/ Biosensing Techniques
/ Clustering
/ computer vision
/ Data acquisition systems
/ Data collection
/ Electromyography
/ environmental sensing
/ Exoskeletons
/ Experiments
/ Female
/ Gait
/ Gait - physiology
/ Humans
/ Inertial platforms
/ intention detection
/ Kinematics
/ Kinetics
/ Locomotion
/ Locomotion - physiology
/ Lower Extremity - physiology
/ Machine learning
/ Male
/ Prostheses
/ Prosthesis Implantation
/ prosthetics
/ Reproducibility
/ sensor fusion
/ Sensors
/ Vision
/ Wearable Electronic Devices
/ Young Adult
2019
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Subject- and Environment-Based Sensor Variability for Wearable Lower-Limb Assistive Devices
Journal Article
Subject- and Environment-Based Sensor Variability for Wearable Lower-Limb Assistive Devices
2019
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Overview
Significant research effort has gone towards the development of powered lower limb prostheses that control power during gait. These devices use forward prediction based on electromyography (EMG), kinetics and kinematics to command the prosthesis which locomotion activity is desired. Unfortunately these predictions can have substantial errors, which can potentially lead to trips or falls. It is hypothesized that one reason for the significant prediction errors in the current control systems for powered lower-limb prostheses is due to the inter- and intra-subject variability of the data sources used for prediction. Environmental data, recorded from a depth sensor worn on a belt, should have less variability across trials and subjects as compared to kinetics, kinematics and EMG data, and thus its addition is proposed. The variability of each data source was analyzed, once normalized, to determine the intra-activity and intra-subject variability for each sensor modality. Then measures of separability, repeatability, clustering and overall desirability were computed. Results showed that combining Vision, EMG, IMU (inertial measurement unit), and Goniometer features yielded the best separability, repeatability, clustering and desirability across subjects and activities. This will likely be useful for future application in a forward predictor, which will incorporate Vision-based environmental data into a forward predictor for powered lower-limb prosthesis and exoskeletons.
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