Design and analysis of active transfemoral prosthesis

Geng, Yanli; Xu, Xin; Yang, Peng

doi:10.1109/iecon.2010.5675461

Cited by 16 publications

(13 citation statements)

References 11 publications

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“…Iterative learning control (ILC) is a relatively new technique that utilizes angle and angular velocity to control prosthetic knee joint [9]. ILC offer a control framework that is capable of ensuring stable and coordinated interaction with the user and his or her external environment.…”

Section: Discussionmentioning

confidence: 99%

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Technology Efficacy in Active Prosthetic Knees for Transfemoral Amputees: A Quantitative Evaluation

El‐Sayed

Hamzaid

Osman

2014

The Scientific World Journal

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Several studies have presented technological ensembles of active knee systems for transfemoral prosthesis. Other studies have examined the amputees' gait performance while wearing a specific active prosthesis. This paper combined both insights, that is, a technical examination of the components used, with an evaluation of how these improved the gait of respective users. This study aims to offer a quantitative understanding of the potential enhancement derived from strategic integration of core elements in developing an effective device. The study systematically discussed the current technology in active transfemoral prosthesis with respect to its functional walking performance amongst above-knee amputee users, to evaluate the system's efficacy in producing close-to-normal user performance. The performances of its actuator, sensory system, and control technique that are incorporated in each reported system were evaluated separately and numerical comparisons were conducted based on the percentage of amputees' gait deviation from normal gait profile points. The results identified particular components that contributed closest to normal gait parameters. However, the conclusion is limitedly extendable due to the small number of studies. Thus, more clinical validation of the active prosthetic knee technology is needed to better understand the extent of contribution of each component to the most functional development.

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Section: Discussionmentioning

confidence: 99%

“…However, the devices still cannot deliver sufficient joint power to restore functions such as climbing stairs, running, many locomotive functions, and standing stability during slope terrain [9–13]. It was noted that powered knee devices can reduce the hip power demand during stance and swing phase [14].…”

Section: Introductionmentioning

confidence: 99%

Technology Efficacy in Active Prosthetic Knees for Transfemoral Amputees: A Quantitative Evaluation

El‐Sayed

Hamzaid

Osman

2014

The Scientific World Journal

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“…Current knees in development include the MIT agonist-antagonist [14] and CSEA [22] knees, a screw driven knee from University of Sakarya [23], and Hebei University of Technology [24]. The Vanderbilt knee-ankle prosthesis is currently the only tested, active, combined ankle-knee prosthesis in the research stages of development [15].…”

Section: Introductionmentioning

confidence: 99%

Ankle–knee prosthesis with active ankle and energy transfer: Development of the CYBERLEGs Alpha-Prosthesis

Flynn

Geeroms

Jiménez‐Fabián

et al. 2015

Robotics and Autonomous Systems

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“…For example, the most critical input to be addressed during a transfemoral prosthesis controlled gait is the foot position, either on or off the ground, and this was determined from the angle, torque, and force sensors measurements. As the transition between gait phases is crucial for the control of active knee, such inertial sensors are used to recognize the transitions between the gait phases [ 4 – 6 ]. A magnetorheologic fluid actuated prosthetic knee used a strain gage sensors as an axial force sensors [ 1 ], sensor that is placed nearby the knee axis to detect force and torque [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Detection of Prosthetic Knee Movement Phases via In‐Socket Sensors: A Feasibility Study

El‐Sayed

Hamzaid

Tan

et al. 2015

The Scientific World Journal

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This paper presents an approach of identifying prosthetic knee movements through pattern recognition of mechanical responses at the internal socket's wall. A quadrilateral double socket was custom made and instrumented with two force sensing resistors (FSR) attached to specific anterior and posterior sites of the socket's wall. A second setup was established by attaching three piezoelectric sensors at the anterior distal, anterior proximal, and posterior sites. Gait cycle and locomotion movements such as stair ascent and sit to stand were adopted to characterize the validity of the technique. FSR and piezoelectric outputs were measured with reference to the knee angle during each phase. Piezoelectric sensors could identify the movement of midswing and terminal swing, pre-full standing, pull-up at gait, sit to stand, and stair ascent. In contrast, FSR could estimate the gait cycle stance and swing phases and identify the pre-full standing at sit to stand. FSR showed less variation during sit to stand and stair ascent to sensitively represent the different movement states. The study highlighted the capacity of using in-socket sensors for knee movement identification. In addition, it validated the efficacy of the system and warrants further investigation with more amputee subjects and different sockets types.

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Design and analysis of active transfemoral prosthesis

Cited by 16 publications

References 11 publications

Technology Efficacy in Active Prosthetic Knees for Transfemoral Amputees: A Quantitative Evaluation

Technology Efficacy in Active Prosthetic Knees for Transfemoral Amputees: A Quantitative Evaluation

Ankle–knee prosthesis with active ankle and energy transfer: Development of the CYBERLEGs Alpha-Prosthesis

Detection of Prosthetic Knee Movement Phases via In‐Socket Sensors: A Feasibility Study

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