Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: Powered transfemoral prosthesis, including: (1) knee, (2) motor revolute joint, (3) axial load cell, (4) motor, (5) ball nut revolute joint, (6) ball screw, (7) knee revolute joint and potentiometer, (8) tibia pylon, (9) pyramid connector, and (10) prosthetic foot. The inset shows the limb positioned at various angles of flexion: 0°, 30°, and 90°. Mechanical stops limit the range of motion.

Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: Angle-dependent transmission ratio between knee torque and motor torque. Motor torque is amplified by a gain of approximately 200 at mid-range and 140 at the mechanical limits.

Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: Average normal knee moment versus knee angle for various locomotive functions with the configuration-dependent torque bound of the actuator (dashed)

Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: Knee specifications transformed to rectified actuator-space requirements. The recommended actuator operation region is bounded by a combination of the maximum motor speed (dark) and the motor’s nominal power of 150 W (light). The dashed line bounds the peak motor output at its nominal voltage of 48 V. Average strides of normal walking, stair ascent, stair descent, and sit-stand are shown as scatter plots.

Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: Amputee EMG (linear envelope) signals of amputee donning myo-socket for static voluntary muscle contractions of the (a) rectus femoris, (b) vastus lateralis, and (c) biceps femoris

Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: Stride-normalized average amputee EMG (linear envelope) signals and ± 1 standard deviations of the (a) rectus femoris, (b) vastus lateralis, and (c) biceps femoris for level walking

Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: (a) Lateral and (b) medial views of the transfemoral prosthesis prototype with electronics, batteries, and prosthetic foot

Date of download: 10/16/2017 Copyright © ASME. All rights reserved. From: The Design and Initial Experimental Validation of an Active Myoelectric Transfemoral Prosthesis J. Med. Devices. 2012;6(1):011005-011005-12. doi:10.1115/1.4005784 Figure Legend: (a) Standing and (b) walking on level ground under myoelectric impedance control with support harness