Relevant bibliographies by topics / Foot prosthesis

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Foot prosthesis'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Foot prosthesis.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Foot prosthesis"

1

Major, Matthew J., Joel Scham, and Michael Orendurff. "The effects of common footwear on stance-phase mechanical properties of the prosthetic foot-shoe system." Prosthetics and Orthotics International 42, no. 2 (May 9, 2017): 198–207. http://dx.doi.org/10.1177/0309364617706749.

Full text
Abstract:
Background:Prosthetic feet are prescribed based on their mechanical function and user functional level. Subtle changes to the stiffness and hysteresis of heel, midfoot, and forefoot regions can influence the dynamics and economy of gait in prosthesis users. However, the user’s choice of shoes may alter the prosthetic foot-shoe system mechanical characteristics, compromising carefully prescribed and rigorously engineered performance of feet.Objectives:Observe the effects of footwear on the mechanical properties of the prosthetic foot-shoe system including commonly prescribed prosthetic feet.Study design:Repeated-measures, Mechanical characterization.Methods:The stiffness and energy return was measured using a hydraulic-driven materials test machine across combinations of five prosthetic feet and four common shoes as well as a barefoot condition.Results:Heel energy return decreased by an average 4%–9% across feet in all shoes compared to barefoot, with a cushioned trainer displaying the greatest effect. Foot designs that may improve perceived stability by providing low heel stiffness and rapid foot-flat were compromised by the addition of shoes.Conclusion:Shoes altered prosthesis mechanical characteristics in the sagittal and frontal planes, suggesting that shoe type should be controlled or reported in research comparing prostheses. Understanding of how different shoes could alter certain gait-related characteristics of prostheses may aid decisions on footwear made by clinicians and prosthesis users.Clinical relevanceShoes can alter function of the prosthetic foot-shoe system in unexpected and sometimes undesirable ways, often causing similar behavior across setups despite differences in foot design, and prescribing clinicians should carefully consider these effects on prosthesis performance.
APA, Harvard, Vancouver, ISO, and other styles
2

Naseri, Amirreza, Majid Mohammadi Moghaddam, Mohammad Gharini, and Maziar Ahmad Sharbafi. "A Novel Adjustable Damper Design for a Hybrid Passive Ankle Prosthesis." Actuators 9, no. 3 (August 24, 2020): 74. http://dx.doi.org/10.3390/act9030074.

Full text
Abstract:
Specifications of actuators when interacting with biological systems such as the human body are entirely different from those used in industrial machines or robots. One important instance of such applications is assistive devices and prostheses. Among various approaches in designing prostheses, recently, semi-active systems attracted the interest of researchers. Even more, some commercial systems benefit from designs such as implementing an adjustable damper in the ankle prosthesis to increase range of motion. The main reason for adding damper is to assist amputees’ walking locomotion on slopes (especially downward). In this paper, we introduce a hydraulic damper design for use in the transtibial prosthetic foot. In the fabricated hydraulic prosthetic foot, two one-way flow control valves are exploited to tune the damping ratio in the plantar flexion and dorsiflexion, independently. Using the carbon prosthetic foot in series to a damper and spring could improve mimicking intact foot movement. First, we present the details of the damper and the prosthesis mechanical design. Then, we introduce experiment-based modeling for the damper’s conceptual design in the proposed prosthesis using SIM-Hydraulic and MATLAB. This device is fabricated and tested in a pilot experiment. The compact design with reduced weight and size of the prosthetic foot are additional advantages of the proposed prosthetic foot.
APA, Harvard, Vancouver, ISO, and other styles
3

Fridman, A., I. Ona, and E. Isakov. "The influence of prosthetic foot alignment on trans-tibial amputee gait." Prosthetics and Orthotics International 27, no. 1 (April 2003): 17–22. http://dx.doi.org/10.3109/03093640309167973.

Full text
Abstract:
An optimally aligned prosthesis, as accomplished by the subjective judgment of the prosthetist, guarantees the best quality of gait. Yet, amputees can adapt to a large variety of geometrical configurations of the prosthetic components. Different external rotation angles of the foot in trans-tibial (TT) prostheses were investigated. The study tried to identify (a) the relationship between foot angle and other gait parameters and (b) the compensating pattern of the amputees to excessive external rotation of the foot. Eight (8) TT amputees, fitted with an identical type of prosthesis, were investigated during ambulation. The prosthetic foot was externally rotated as follows: optimal angle (10.94°±5.21°), optimal angle plus another 18°, and optimal angle plus another 36°. Analysis of gait was performed with the aid of an electronic walkway. Speed of gait, stance and swing time, and foot angle were monitored in 4 runs for each of the three foot angles. Speed of gait remained almost constant in the three tests. Stance and swing time, as well as step length, significantly changed when 36° were added to the optimal foot angle. This foot position significantly influenced inter-legs time difference and symmetry between the legs. During ambulation, prosthetic foot external rotation was decreased by internal rotation of the limb at the hip joint level. It is concluded that TT amputees can maintain an efficient speed of gait even when the prosthetic foot is malpositioned in excessive external rotation. Although such a malalignment significantly influences other gait parameters during walking, amputees are able to adapt themselves by internal rotation of the hip joint in the amputated leg.
APA, Harvard, Vancouver, ISO, and other styles
4

Herr, Hugh M., and Alena M. Grabowski. "Bionic ankle–foot prosthesis normalizes walking gait for persons with leg amputation." Proceedings of the Royal Society B: Biological Sciences 279, no. 1728 (July 13, 2011): 457–64. http://dx.doi.org/10.1098/rspb.2011.1194.

Full text
Abstract:
Over time, leg prostheses have improved in design, but have been incapable of actively adapting to different walking velocities in a manner comparable to a biological limb. People with a leg amputation using such commercially available passive-elastic prostheses require significantly more metabolic energy to walk at the same velocities, prefer to walk slower and have abnormal biomechanics compared with non-amputees. A bionic prosthesis has been developed that emulates the function of a biological ankle during level-ground walking, specifically providing the net positive work required for a range of walking velocities. We compared metabolic energy costs, preferred velocities and biomechanical patterns of seven people with a unilateral transtibial amputation using the bionic prosthesis and using their own passive-elastic prosthesis to those of seven non-amputees during level-ground walking. Compared with using a passive-elastic prosthesis, using the bionic prosthesis decreased metabolic cost by 8 per cent, increased trailing prosthetic leg mechanical work by 57 per cent and decreased the leading biological leg mechanical work by 10 per cent, on average, across walking velocities of 0.75–1.75 m s −1 and increased preferred walking velocity by 23 per cent. Using the bionic prosthesis resulted in metabolic energy costs, preferred walking velocities and biomechanical patterns that were not significantly different from people without an amputation.
APA, Harvard, Vancouver, ISO, and other styles
5

De Pauw, Kevin, Pierre Cherelle, Bart Roelands, Dirk Lefeber, and Romain Meeusen. "The efficacy of the Ankle Mimicking Prosthetic Foot prototype 4.0 during walking: Physiological determinants." Prosthetics and Orthotics International 42, no. 5 (April 6, 2018): 504–10. http://dx.doi.org/10.1177/0309364618767141.

Full text
Abstract:
Background: Evaluating the effectiveness of a novel prosthetic device during walking is an important step in product development. Objective: To investigate the efficacy of a novel quasi-passive ankle prosthetic device, Ankle Mimicking Prosthetic Foot 4.0, during walking at different speeds, using physiological determinants in transtibial and transfemoral amputees. Study design: Nonrandomized crossover design for amputees. Methods: Six able-bodied subjects, six unilateral transtibial amputees, and six unilateral transfemoral amputees underwent a 6-min walk test at normal speed, followed by series of 2-min walking at slow, normal, and fast speeds. The intensity of effort and subjective measures were determined. Amputees performed all walking tests on a treadmill with current and novel prostheses. Shapiro–Wilk normality tests and parametric and nonparametric tests were conducted (p < 0.05). Results: Compared to able-bodied individuals, the rating of perceived exertion levels were significantly elevated in transtibial and transfemoral amputees for both prostheses (p ≤ 0.016). Compared to able-bodied individuals transfemoral amputees also showed significantly elevated heart rate for both prostheses at normal speed (p ≤ 0.043). Within-group comparisons demonstrated that walking with Ankle Mimicking Prosthetic Foot significantly increased the heart rate in transfemoral amputees and transtibial compared to current prosthesis (p = 0.002). Furthermore, transfemoral amputees reached a significantly higher rating of perceived exertion levels. Conclusion: Intensity of effort during walking with Ankle Mimicking Prosthetic Foot is higher compared to current prostheses. Clinical relevance Ankle Mimicking Prosthetic Foot 4.0 is a novel quasi-passive ankle prosthesis with state-of-the-art technological parts. Subjective measures show the importance of this technology, but the intensity of effort during walking still remains higher compared to current passive prostheses, especially in transfemoral amputees.
APA, Harvard, Vancouver, ISO, and other styles
6

Verheul, Floor Jacoba Marie-Georgette, Olaf Verschuren, Maremka Zwinkels, Mariska Herwegh, Anka Michielsen, Marieke de Haan, and Iris van Wijk. "Effectiveness of a crossover prosthetic foot in active children with a congenital lower limb deficiency: an explorative study." Prosthetics and Orthotics International 44, no. 5 (May 6, 2020): 305–13. http://dx.doi.org/10.1177/0309364620912063.

Full text
Abstract:
Background: Children with lower limb prostheses cannot always keep up with their peers during active play. A pediatric crossover foot may be a promising prosthetic alternative for children engaging in high-intensity movements necessary for active play. Objectives: To compare children’s walking performance, running performance, experienced competence, and cosmesis using their prescribed prosthesis compared with the crossover foot. Study Design: Pretest-posttest study. Methods: Children with lower limb amputation or deficiency were recruited. Measurements were taken at baseline with the prescribed prosthesis and 6 weeks later with the crossover foot. Walking speed, energy cost of walking, anaerobic muscle power, stair climbing speed, ankle power, and cosmesis were evaluated. Results: Four children participated in the study. Two children had increased walking speed with the same energy cost, one child had decreased speed with increased energy cost, and one child had the same speed with decreased energy cost. Muscle power increased for three of the four children and ankle power increased for all children while using the crossover foot compared to the prescribed prosthesis. Two children reported knee pain or feeling excessive knee flexion when running with the crossover foot. One child reported negative feelings toward cosmesis of the crossover foot. Conclusions: This study suggests crossover foot may benefit active children by improving walking and running performance, and decreasing energy cost. However, knee pain reports or negative feelings toward the atypical design suggest the crossover foot may not be ideal for every child. Further research is needed to determine which pediatric users would benefit from this type of prosthetic foot. Clinical relevance Children with lower limb deficiencies are active prosthetic users who often switch between low- and high-intensity movements in their daily activities. Therefore, they might benefit from a crossover prosthetic design. The preliminary findings of this study suggest the crossover foot (XF) may be a promising foot for active children.
APA, Harvard, Vancouver, ISO, and other styles
7

Verhoeff, T. T., P. A. Poetsma, L. Gasser, and H. Tung. "Evaluation of use and durability of polypropylene trans-tibial prostheses." Prosthetics and Orthotics International 23, no. 3 (December 1999): 249–55. http://dx.doi.org/10.3109/03093649909071642.

Full text
Abstract:
Forty-three (43) trans-tibial prostheses with a mean period of use of 33 months were evaluated in terms of utilisation and durability. The majority of the prostheses (80%) were worn by amputees with demanding occupations, such as farmers, fishermen and tradesmen. The prostheses were in use approximately 9 hours per day. No major or frequent breakdowns of the polypropylene prosthetic components were found. The suspension belts were the parts most frequently affected; a total of 32 needed replacement after an average 11 months of use. Eleven (11) prostheses were completely replaced, more than half at least partly because of socket-fitting problems. In all, socket-fitting problems were found in 15 prostheses, causing pain and consequently limitation of use. While the prosthetic polypropylene components were satisfactory, the rubber foot was a major cause of early breakdown. A total of 40 feet were replaced; their mean period of use before breakdown was 9 months. In practice, parts were frequently replaced at a later stage than desirable, meaning that there was frequent “overuse” of prostheses with worn parts. Measures were taken to increase the life span of the prosthesis: change in the design of the foot; issuing a spare foot with the prosthesis; strengthening the suspension belt. Additional evaluations are necessary to confirm the degree to which the findings are representative.
APA, Harvard, Vancouver, ISO, and other styles
8

Prince, F., P. Allard, R. G. Therrien, and B. J. McFadyen. "Running gait impulse asymmetries in below-knee amputees." Prosthetics and Orthotics International 16, no. 1 (April 1992): 19–24. http://dx.doi.org/10.3109/03093649209164303.

Full text
Abstract:
In running, large gait asymmetry is expected due to the inability of the foot prosthesis to comply with the kinematic demands and produce a powerful plantarflexion moment. In this work, interlimb asymmetry in below-knee (BK) amputee running gait was assessed for one rigid and three flexible keel prostheses, using vertical and anteroposterior ground reaction forces and respective impulses. Nine BK amputees and 6 controls participated in this study. The running speed was monitored by two light sensitive detectors while the ground reaction forces were measured with a Kistler force plate. Between the prosthetic side and the sound limb the impulse indicator showed greater asymmetry than the force. Interlimb asymmetry was very much present in all types of prosthesis tested but is less pronounced in the flexible keel prostheses. In the latter, the asymmetry may be associated with the forcetime history modulation rather than its magnitude alone. Generally, the impulses better describe interlimb asymmetry and the forces allow a greater discrimination between prosthetic foot types.
APA, Harvard, Vancouver, ISO, and other styles
9

Sin, S. W., D. H. K. Chow, and J. C. Y. Cheng. "A new alignment jig for quantification and prescription of three-dimensional alignment for the patellar-tendon-bearing trans-tibial prosthesis." Prosthetics and Orthotics International 23, no. 3 (December 1999): 225–30. http://dx.doi.org/10.3109/03093649909071638.

Full text
Abstract:
Clinically, it is hard to achieve and reproduce prosthesis alignment at will during daily prosthesis fitting. A new alignment jig was designed and developed to facilitate quantification and prescription of prosthesis alignment for patellar-tendon-bearing (PTB) trans-tibial prostheses. The alignment jig provided instantaneous readings of the three-dimensional orientation and position of the socket relative to the prosthetic foot in standardised units. The inter- and intra-tester errors of the alignment jig in measuring prosthesis alignment were evaluated and demonstrated to have good reliability. The alignment jig was recommended to be used clinically after the conventional dynamic alignment procedure to document the prosthesis alignment. Further application of the alignment jig for systematic evaluation of the effects of prosthesis alignment on gait for trans-tibial amputees is suggested.
APA, Harvard, Vancouver, ISO, and other styles
10

Scheepers, Lisan G., Joep O. Storcken, Frans Rings, Yvette van Horn, and Henk A. Seelen. "New socket-less prosthesis concept facilitating comfortable and abrasion-free cycling after Van Nes rotationplasty." Prosthetics and Orthotics International 39, no. 2 (January 15, 2014): 161–65. http://dx.doi.org/10.1177/0309364613515494.

Full text
Abstract:
Background and aim:Current leg prostheses in rotationplasty typically feature a thigh cuff, which, in cycling, may cause perspiration problems and friction-related abrasions of the skin. The aim has been to develop a socket-less prosthetic device for persons with a rotationplasty to be able to engage in high-intensity cycling without contracting abrasions.Technique:The new device (Socket-Less Rotationplasty Prosthesis for Cycling) features a standard cycling shoe on the rotationplasty foot, replacing the conventional socket and thigh cuff. A reinforced 12-layer carbon fibre frame bolted to the aforementioned shoe, replacing the standard tube, connects to a prosthetic foot and a second cycling shoe. Alignment of the Socket-Less Rotationplasty Prosthesis for Cycling is done both statically and dynamically.Discussion:The Socket-Less Rotationplasty Prosthesis for Cycling is lightweight and more ventilated relative to conventional sockets. All components can be replaced easily. Most important, however, is that the current user now can cycle 135 km on end without skin abrasions.Clinical relevanceThe Socket-Less Rotationplasty Prosthesis for Cycling concept enables patients with a leg rotationplasty to engage in high-intensity cycling without contracting skin problems, thereby facilitating clients’ participation.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Foot prosthesis"

1

Au, Samuel Kwok-Wai. "Powered ankle-foot prosthesis for the improvement of amputee walking economy." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40949.

Full text
Abstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
Includes bibliographical references (p. 103-108).
The human ankle provides a significant amount of net positive work during the stance period of walking, especially at moderate to fast walking speeds. On the contrary, conventional ankle-foot prostheses are completely passive during stance, and consequently, cannot provide net positive work. Clinical studies indicate that transtibial amputees using conventional prostheses exhibit higher gait metabolic rates as compared to intact individuals. Researchers believe the main cause for the observed increase in metabolism is due to the inability of conventional prostheses to provide net positive work at terminal stance in walking. This objective of this thesis is to evaluate the hypothesis that a powered ankle-foot prosthesis, capable of providing active mechanical power at terminal stance, can improve amputee metabolic walking economy compared to a conventional passive-elastic prosthesis. To test the hypothesis, a powered prosthesis is designed and built that comprises a unidirectional spring, configured in parallel with a force-controllable actuator with series elasticity. The prosthesis is controlled to mimic human ankle walking behavior, in particular, the power generation characteristics observed in normal human walking. The rate of oxygen consumption is measured as a determinant of metabolic rate on three unilateral transtibial amputees walking at self-selected speeds. The initial clinical evaluation shows that the powered prosthesis improves amputee metabolic economy from 7% to 20% compared to the conventional passive-elastic prostheses (Flex-Foot Ceterus and Freedom Innovations Sierra), even though the powered system is twofold heavier than the conventional devices. These results support the proposed hypothesis and also suggest a promising direction for further advancement of ankle-foot prosthesis.
by Samuel Kwok-Wai Au.
Ph.D.
APA, Harvard, Vancouver, ISO, and other styles
2

Rogers, Emily S. M. Massachusetts Institute of Technology. "Neurally-controlled ankle-foot prosthesis with non-backdrivable transmission for rock climbing augmentation." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121861.

Full text
Abstract:
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 87-88).
This thesis presents the design and evaluation of a neurally-controlled ankle-foot prosthesis optimized to enhance rock climbing ability in persons with transtibial amputation. The bionic rock climbing prosthesis restores biologic performance of the ankle-foot complex. The user volitionally controls the positions of both the prosthetic ankle and subtalar joints via input from electromyography surface electrodes worn on the residual limb. We hypothesize that a climbing specific robotic ankle-foot prosthesis will result in more biological emulation than a passive prosthesis. Specifically, we hypothesize that joint angles of the hip, knee, ankle, and subtalar of a person with transtibial amputation while rock climbing are are more similar to the joint angles of a height-, weight-, and ability-matched control subject with intact limbs, compared to climbing with a passive prosthesis. To test the hypothesis, a powered, 2-degree-of-freedom, neurally controlled prosthesis is built that comprises a pair of non-backdrivable linear actuators providing 16 degrees of dorsiflexion, 18 degrees of plantar flexion, and 20 degrees each of inversion and eversion. The prosthesis operates at a bandwidth and range of motion matching biological free-space motion of the ankle and subtalar joint. Climbing performance is evaluated by measuring joint angles and muscle activity during rock climbing with the robotic prosthesis and a traditional passive prosthesis, and comparing the kinematic data to that of a subject with intact biological limbs. We find that the bionic prosthesis brings the ankle and subtalar joint angles of the subject to more similar angles than the control subjects with intact biological limbs, compared to a standard passive prosthesis. These results indicate that a lightweight, actuated, 2-degree-of-freedom neurally-controlled robotic ankle-foot prosthesis restores biological function to the user during an extremely technical sport.
by Emily Rogers.
S.M.
S.M. Massachusetts Institute of Technology, Department of Mechanical Engineering
APA, Harvard, Vancouver, ISO, and other styles
3

Martinez, Villalpando Ernesto Carlos. "Estimation of ground reaction force and zero moment point on a powered ankle-foot prosthesis." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37271.

Full text
Abstract:
Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2006.
Includes bibliographical references (leaves 89-97).
Commercially available ankle-foot prostheses are passive when in contact with the ground surface, and thus, their mechanical properties remain fixed across different terrains and walking speeds. The passive nature of these prostheses causes many problems for lower extremity amputees, such as a lack of adequate balance control during standing and walking. The ground reaction force (GRF) and the zero moment point (ZMP) are known to be basic parameters in bipedal balance control. This thesis focuses on the estimation of these parameters using two prostheses, a powered ankle-foot prototype and an instrumented, mechanically-passive prosthesis worn by a transtibial amputee. The main goal of this research is to determine the feasibility of estimating the GRF and ZMP primarily using sensory information from a force/torque transducer positioned proximal to the ankle joint. The location of this sensor is ideal because it allows the use of a compliant artificial foot to be in contact with the ground, in contrast to rigid foot structures employed by walking robots. Both, the active and passive, instrumented prostheses were monitored with a wearable computing system designed to serve as a portable control unit for the active prototype and as an ambulatory gait analysis tool.
(cont.) A set of experiments were conducted at MIT's gait laboratory whereby a below-knee amputee subject, using the prosthetic devices, was asked to perform single-leg standing tests and slow-walking trials. For each experiment, the GRF and ZMP were computed by combining the kinetic and kinematic information recorded from a force platform and a 3D motion capture system. These values were statistically compared to the GRF and ZMP estimated from the data collected by the embedded prosthetic sensory system and portable computing unit. The average RMS error and correlation factor were calculated for all experimental sessions. Using a static analysis procedure, the estimation of the vertical component of GRF had an averaged correlation coefficient higher than 0.96. The estimated ZMP location had a distance error of less than 1 cm, equal to 4% of the anterior-posterior foot length or 12% of the mediolateral foot width. These results suggest that it is possible to estimate the GRF between the ground and a compliant artificial prosthesis with a sensor positioned between the knee and the ankle joint.
(cont.) Moreover, this sensory information is sufficient to closely estimate the ZMP location during the single support phase of slow walking and while standing on one leg. This research contributes to the development of fully integrated artificial extremities that mimic the behavior of the human ankle-foot complex, especially to help improve the postural stability of lower extremity amputees.
by Ernesto Carlos Martinez Villalpando.
S.M.
APA, Harvard, Vancouver, ISO, and other styles
4

Schlafly, Millicent. "Design and Testing of a Passive Prosthetic Ankle Foot Optimized to Mimic an Able-Bodied Gait." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7710.

Full text
Abstract:
Currently there are nearly 2 million people living with limb loss in the United States [1]. Many of these individuals are either transtibial (below knee) or transfemoral (above knee) amputees and require an ankle-foot prosthesis for basic mobility. While there are an abundance of options available for individuals who require an ankle-foot prosthesis, these options fail to mimic an intact ankle when it comes to key evaluation criteria such as range of motion, push-off force, and roll over shape. The roll over shape is created by plotting the center of pressure during a step in a shank-based coordinate system. To address the need for a prosthesis that effectively replaces the ankle's contribution to an able-bodied gait, a biomimetic approach is taken in the design the Compliant & Articulating Prosthetic Ankle (CAPA) foot. The passive CAPA foot consists of four components connected by torsion springs representing the Phalanges, Metatarsal bones, Talus, and Calcaneus. Biomimetic functionality is exhibited by CAPA foot with regards to the roll over shape and a linear relationship between moment exerted and ankle angle, distinguishing the CAPA foot from other ankle-foot prostheses. A mathematical model of the CAPA foot is created to determine the roll over shape a specific CAPA foot geometry would produce and support eventual customization of the 3D printed components. The mathematical model is used to optimize the design to two distinctly different roll over shapes, one with a rocker radius closer to that of the Talus bone and the other closer to the energetically advantageous value of 0.3 times leg length [2, 3]. Compliant and stiff versions of the two CAPA feet were compared to a conventional Solid Articulating Cushioned Heel (SACH) foot and a passive dynamic response foot (Renegade® AT produced by Freedom Innovations). Ten able bodied subjects walked on the Computer Assisted Rehabilitation Environment normally, and then with a transfemoral prosthetic simulator. The study was separated into two experiments. For the second experiment (subjects 6-10), the versions of the CAPA foot had pretension in the dorsiflexion springs. Overall the ankle angles and sagittal plane ground reaction forces of the CAPA foot better mimicked an intact ankle-foot than the existing passive ankle-foot prostheses. Added pretension increased the sagittal plane ground reaction forces and roll over shape radius of curvature and arc length. Nine out of ten participants preferred the CAPA foot and there was a statistical significant difference (F=14.2, p<0.01) between the difficulty level rating given for trials with the CAPA foot versus the existing ankle-foot prostheses. The mathematical model is found to be capable of accurately predicting experimental roll over shape trends and the concept of roll over shape based design is demonstrated. Successful aspects of the CAPA foot can be applied to other ankle-foot prosthesis. The CAPA foot could provide a passive, cheap, and personalizable ankle-foot prosthesis that improves mobility the quality of life for individual’s lacking an intact ankle.
APA, Harvard, Vancouver, ISO, and other styles
5

Hafner, Brian J. "Transtibial amputee gait adaptation : correlating residual limb compliance to energy storing and return prosthetic foot compliance in bouncing gait /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/8038.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Struckovs, Vasilijs. "Biomechanical adaptations involved in ramp descent: Impact of microprocessor-controlled ankle-foot prothesis. Kinetic and kinematic responses to using microprocessor-controlled ankle-foot prosthesis in unilateral trans-tibial amputees during ramp descent." Thesis, University of Bradford, 2017. http://hdl.handle.net/10454/17214.

Full text
Abstract:
Ramp descent is a demanding task for trans-tibial amputees, due to the difficulty in controlling body weight progression over the prosthetic foot. A deeper understanding of the impact of foot function on ramp descent biomechanics is required to make recommendations for rehabilitation programs and prosthetic developments for lower-limb amputees. The thesis aim was to determine the biomechanical adaptations made by active unilateral trans-tibial amputees (TT) using a microprocessor-controlled ankle-foot prosthesis in active (MC-AF) compared to non-active mode (nonMC-AF) or elastically articulated ankle-foot device. A secondary aim was to determine the biomechanical adaptation made by able-bodied individuals when ankle motion was restricted using a custom made ankle-foot-orthosis and provide further insight into the importance of ankle dynamics when walking on ramps. Kinetic and kinematic data were recorded from nine TT’s and twenty able-bodied individuals. Able-bodied participants, ankle restriction, led to an increase in involved limb loading response knee flexion that is accompanied by the increased knee power generation during the single-limb-support phase that correlates to TTs results. TT’s use of an MC-AF reduced the ‘plantar-flexion’ resistance following foot contact allowing foot-flat to be attained more quickly. Followed by the increased ‘dorsi-flexion’ resistance which reduced the shank/pylon rotation velocity over the support foot, leading to an increase in negative work done by the prosthesis. These findings highlight the importance of having controlled ankle motion in ramp descent. Use of an MC-AF can provide TTs controlled motion for descending ramps and hence provide biomechanical benefits over using more conventional types of ankle-foot devices.
Engineering and Physical Science Research Council (EPSRC) via Doctoral Training Account (DTA) (EP/P504821/1) Chas. A. Blatchford and Sons Ltd., Basingstoke, UK provided the prosthetic hardware, prosthetist support, and facilitated the attendance of the TT participants for this study
APA, Harvard, Vancouver, ISO, and other styles
7

De, Asha Alan R. "Biomechanical adaptations of lower-limb amputee-gait: Effects of the echelon hydraulically damped foot. Segmental kinetic and kinematic responses to hydraulically damped prosthetic ankle-foot components in unilateral, trans-tibial amputees." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/7271.

Full text
Abstract:
The aim of this thesis was to determine the biomechanical adaptations made by active unilateral trans-tibial amputees when they used a prosthesis incorporating a hydraulically-damped, articulating ankle-foot device compared to non-hydraulically attached devices. Kinematic and kinetic data were recorded while participants ambulated over a flat and level surface at their customary walking speeds and at speeds they perceived to be faster and slower using the hydraulic device and their habitual foot. Use of the hydraulic device resulted in increases in self-selected walking speeds with a simultaneous reduction in intact-limb work per meter travelled. Use of the device also attenuated inappropriate fluctuations in the centre-of-pressure trajectory beneath the prosthetic foot and facilitated increased residual-knee loading-response flexion and prosthetic-limb load bearing during stance. These changes occurred despite the hydraulic device absorbing more, and returning less, energy than the participants’ habitual ankle-foot devices. The changes were present across all walking speeds but were greatest at customary walking speeds. The findings suggest that a hydraulic ankle-foot device has mechanical benefits, during overground gait, for active unilateral trans-tibial amputees compared to other attachment methods. The findings also highlight that prosthetic ankle-foot device ‘performance’ can be evaluated using surrogate measures and without modelling an ‘ankle joint’ on the prosthetic limb.
APA, Harvard, Vancouver, ISO, and other styles
8

De, Asha Alan Richard. "Biomechanical adaptations of lower-limb amputee-gait : effects of the echelon hydraulically damped foot : segmental kinetic and kinematic responses to hydraulically damped prosthetic ankle-foot components in unilateral, trans-tibial amputees." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/7271.

Full text
Abstract:
The aim of this thesis was to determine the biomechanical adaptations made by active unilateral trans-tibial amputees when they used a prosthesis incorporating a hydraulically-damped, articulating ankle-foot device compared to non-hydraulically attached devices. Kinematic and kinetic data were recorded while participants ambulated over a flat and level surface at their customary walking speeds and at speeds they perceived to be faster and slower using the hydraulic device and their habitual foot. Use of the hydraulic device resulted in increases in self-selected walking speeds with a simultaneous reduction in intact-limb work per meter travelled. Use of the device also attenuated inappropriate fluctuations in the centre-of-pressure trajectory beneath the prosthetic foot and facilitated increased residual-knee loading-response flexion and prosthetic-limb load bearing during stance. These changes occurred despite the hydraulic device absorbing more, and returning less, energy than the participants’ habitual ankle-foot devices. The changes were present across all walking speeds but were greatest at customary walking speeds. The findings suggest that a hydraulic ankle-foot device has mechanical benefits, during overground gait, for active unilateral trans-tibial amputees compared to other attachment methods. The findings also highlight that prosthetic ankle-foot device ‘performance’ can be evaluated using surrogate measures and without modelling an ‘ankle joint’ on the prosthetic limb.
APA, Harvard, Vancouver, ISO, and other styles
9

Lasota, Marek. "Návrh protetického chodidla s využitím aditivních výrobních technologií." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382165.

Full text
Abstract:
Subject of this diploma thesis is a design of a prosthetic foot for an additive manufacturing. It is a dynamic foot made of plastic, designed for an 80 kg patient with a second level of a movement aktivity. From a few concepts is chosen one, which is then optimalized and printed with a MJF method. Functional sample is then undergoing static and cyclic tests according to ISO 10328.
APA, Harvard, Vancouver, ISO, and other styles
10

Eslamy, Mahdy Verfasser], Andre [Akademischer Betreuer] Seyfarth, and Stephan [Akademischer Betreuer] [Rinderknecht. "Emulation of Ankle Function for Different Gaits through Active Foot Prosthesis: Actuation Concepts, Control and Experiments / Mahdy Eslamy. Betreuer: Andre Seyfarth ; Stephan Rinderknecht." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2014. http://d-nb.info/1110903294/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Foot prosthesis"

1

Coetzee, J. Christiaan. Arthritis & arthroplasty: The foot and ankle. Philadelphia, Pa: Saunders/Elsevier, 2010.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

C, Nielsen Caroline, ed. Orthotics and prosthetics in rehabilitation. 2nd ed. St. Louis, Mo: Saunders/Elsevier, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

J, D'Astous, Edelstein Joan M, and Nielsen Caroline C, eds. Orthotics and prosthetics in rehabilitation. Boston, Mass: Butterworth Heinemann, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Investigations, United States Congress House Committee on Energy and Commerce Subcommittee on Oversight and. The Bjork-Shiley heart valve, earn as you learn: Shiley Inc.'s breach of the honor system and FDA's failure in medical device regulation : a staff report. Washington: U.S. G.P.O., 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Oversight and Investigations. FDA and the medical device industry: Hearing before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, House of Representatives, One Hundred First Congress, second session, February 26, 1990. Washington: U.S. G.P.O., 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Oversight and Investigations. FDA and the medical device industry: Hearing before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, House of Representatives, One Hundred First Congress, second session, February 26, 1990. Washington: U.S. G.P.O., 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Oversight and Investigations. FDA and the medical device industry: Hearing before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, House of Representatives, One Hundred First Congress, second session, February 26, 1990. Washington: U.S. G.P.O., 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

FDA and the medical device industry: Hearings before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, House of Representatives, One Hundred Second Congress, second session, March 25 and June 3, 1992. Washington: U.S. G.P.O., 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

New Design of Prosthetic Feet Made of New Materials: EXPERIMENTAL AND NUMERICAL ANALYSIS OF COMPOSITE MATERIALS PROSTHESIS FOOT. Amazon, LAP LAMBERT Academic Publishing: Hasan Saad, 2016.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

1960-, Coetzee J. Christiaan, and Hurwitz Shepard R, eds. Arthritis & arthroplasty.: The foot and ankle. Philadelphia, PA: Saunders/Elsevier, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Foot prosthesis"

1

Abdulsadah, Falah Hasan, Qasim Murtaza, Faisal Hasan, Siddharth Bhardwaj, Mehul Varshney, and Marwan Shaiban. "Design and Analysis of Partial Right Foot Chopart Socket Prosthesis." In Design Science and Innovation, 793–98. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9054-2_93.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Gupta, Rohit, and Ravinder Agarwal. "Lower-limb muscle EMG analysis to predict ankle-foot activities for prosthesis control." In Smart Computing, 404–11. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003167488-46.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Dong, Dianbiao, Wenjie Ge, Jianting Wang, Yuanxi Sun, and Donglai Zhao. "Optimal Design and Analysis of a Powered Ankle-Foot Prosthesis with Adjustable Actuation Stiffness." In Advances in Intelligent Systems and Computing, 578–87. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00214-5_73.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Klenerman, Leslie, and Bernard Wood. "Amputations and Prostheses." In The Human Foot, 157–73. London: Springer London, 2006. http://dx.doi.org/10.1007/1-84628-032-x_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Bonasia, Davide Edoardo, Laura Bruno, Lorenzo Morino, and Raul Cerlon. "Foot and Ankle." In Imaging of Prosthetic Joints, 95–102. Milano: Springer Milan, 2014. http://dx.doi.org/10.1007/978-88-470-5483-7_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

LeMoyne, Robert. "Ankle-Foot Complex and the Fundamental Aspects of Gait." In Advances for Prosthetic Technology, 15–27. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-55816-3_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Santiago, A. M., R. G. Rodríguez, E. A. Merchán, O. F. Avilés, J. Gudińo, and M. Avalos. "Design of an Impulsion Prosthetic System for Prosthetic Foot." In VI Latin American Congress on Biomedical Engineering CLAIB 2014, Paraná, Argentina 29, 30 & 31 October 2014, 964–67. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13117-7_244.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ficanha, Evandro M., Mohammad Rastgaar, and Kenton R. Kaufman. "Multi-axis Capability for Powered Ankle-Foot Prostheses." In Trends in Augmentation of Human Performance, 85–103. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8932-5_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Hansen, Andrew, and Felix Starker. "Prosthetic Foot Principles and Their Influence on Gait." In Handbook of Human Motion, 1–15. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30808-1_74-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Hansen, Andrew, and Felix Starker. "Prosthetic Foot Principles and Their Influence on Gait." In Handbook of Human Motion, 1343–57. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-14418-4_74.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Foot prosthesis"

1

Nanjangud, Akshay, and Robert D. Gregg. "Simultaneous Control of an Ankle-Foot Prosthesis Model Using a Virtual Constraint." In ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-5963.

Full text
Abstract:
Amputee locomotion can benefit from recent advances in robotic prostheses, but their control systems design poses challenges. Prosthesis control typically discretizes the nonlinear gait cycle into phases, with each phase controlled by different linear controllers. Unfortunately, real-time identification of gait phases and tuning of controller parameters limit implementation. Recently, biped robots have used phase variables and virtual constraints to characterize the gait cycle as a whole. Although phase variables and virtual constraints could solve issues with discretizing the gait cycle, the virtual constraints method from robotics does not readily translate to prosthetics because of hard-to-measure quantities, like the interaction forces between the user and prosthesis socket, and prosthesis parameters which are often altered by a clinician even for a known patient. We use the simultaneous stabilization approach to design a low-order, linear time-invariant controller for ankle prostheses independent of such quantities to enforce a virtual constraint. We show in simulation that this controller produces suitable walking gaits for a simplified amputee model.
APA, Harvard, Vancouver, ISO, and other styles
2

de Bastos, Talita P., José R. Galvão, Cicero Martelli, and Jean Carlos Cardozo da Silva. "Smart Carbon Fiber Foot Prosthesis." In Bragg Gratings, Photosensitivity and Poling in Glass Waveguides and Materials. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/bgppm.2018.jtu2a.17.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Dallali, Houman, Evandro Ficanha, and Mohammad Rastgaar Aagaah. "Dynamic Modeling of a 2-DOF Cable Driven Powered Ankle-Foot Prosthesis." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9706.

Full text
Abstract:
The first step to study and develop a two Degrees of Freedom (DOF) prosthesis is to derive a dynamic model for simulation and control design. In this paper, the ankle-foot prosthesis has controllable Dorsi-Plantarflexion (DP) and Inversion-Eversion (IE) DOF. We derive a compliant dynamic model for a recently developed ankle-foot prosthesis followed by identification of the actuators, transmission, and prosthetic foot parameters. The resulting model is then verified experimentally and in simulation. Dynamic decoupling of the actuators to the ankle’s DP and IE DOF is also investigated using Bode plots. The code used for simulating the prosthesis is provided on GitHub for the community.
APA, Harvard, Vancouver, ISO, and other styles
4

Nickel, Eric, Gregory Voss, Andrew Hansen, and Sara Koehler-McNicholas. "Development of an Ankle-Foot Prosthesis for Physical Therapy." In 2019 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/dmd2019-3238.

Full text
Abstract:
A novel ankle-foot prosthesis with adjustable range-of-motion limits was developed to support implementation of gradual training protocols in the physical therapy of new amputees. Stakeholder interviews drove design requirements that guided the development. Our first prototype did not pass structural strength testing, but with minor revisions to some components, our second prototype was able to pass structural strength testing to the P6 load level (125kg user) of the ISO 10328 standard for prosthetic feet. The system is ready for laboratory testing with prosthesis users and clinicians to generate further insight for future design iterations.
APA, Harvard, Vancouver, ISO, and other styles
5

Sie, Astrini, Jonathan Realmuto, and Eric Rombokas. "A Lower Limb Prosthesis Haptic Feedback System for Stair Descent." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3409.

Full text
Abstract:
Though there are a variety of prosthetic limbs that address the motor deficits associated with amputation, there has been relatively little progress in restoring sensation. Prosthetic limbs provide little direct sensory feedback of the forces they encounter in the environment, but “closing the loop” between sensation and action can make a great difference in performance [1]. For users of lower limb prostheses, stair descent is a difficult and dangerous task. The difficulty in stair descent can be attributed to three different factors: 1) Absence of tactile and haptic sensations at the bottom of the foot. Although force on the prosthetic socket provides some haptic feedback of the terrain being stepped on, this feedback does not provide information on the location of the staircase edge. 2) Insufficient ankle flexion of lower limb prostheses. Dorsiflexion of the physiological ankle during stair descent is about 27°. Even prostheses that provide active dorsiflexion provide less than this number, and regular prostheses provide almost no ankle dorsiflexion. The first two factors are analogous to the sensation of stair descent for someone without amputation wearing ski boots. 3) Prosthetic feet are optimized for flat-ground walking, offering undesirable energy storage at ankle flexion and energy return at toe-off. This can result in unwanted extra energy at the end of stance phase, propelling the user forward down the stairs. Most lower limb prosthesis designs focus on flat ground walking, but there has been less progress in addressing the challenges of stair descent. One technique that users of prosthetic lower limbs can use for addressing these challenges is to employ an “overhanging toe” foot placement strategy. Under this strategy, the edge of the staircase is used as a pivot point for the foot to roll over the stair. This reduces the need for ankle flexion by allowing the knee and hip to compensate, and avoids storing energy in the prosthetic spring. This strategy is dynamic, and requires the user to know the amount of toe overhang to adjust the movement of the rest of the body. Most haptic devices built to assist individuals wearing prostheses focus on upper extremity tasks [2–4] or standing and walking [5,6]. Whereas previous lower limb sensory replacement systems have targeted standing measures, here we focus on stair descent. The system provides cues of the stair edge location via vibrotactile stimulations on the thigh.
APA, Harvard, Vancouver, ISO, and other styles
6

Fairhurst, Stuart R., Sara R. Koehler-McNicholas, Billie C. S. Slater, Eric A. Nickel, Karl A. Koester, Gregory O. Voss, Andrew H. Hansen, and John E. Ferguson. "Improving Automatic Control of an Ankle-Foot Prosthesis Using Machine Learning Algorithms." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3464.

Full text
Abstract:
Most commercially available lower-limb prostheses are designed for walking, not for standing. The Minneapolis VA Health Care System has developed a bimodal prosthetic ankle-foot system with distinct modes for walking and standing [1]. With this device, a prosthesis user can select standing or walking mode in order to maximize standing stability or walking functionality, depending on the activity and context. Additionally, the prosthesis was designed to allow for an “automatic mode” to switch between standing and walking modes based on readings from an onboard Inertial Measurement Unit (IMU) without requiring user interaction to manually switch modes. A smartphone app was also developed to facilitate changing between walking, standing and automatic modes. The prosthesis described in [1] was used in a pilot study with 18 Veterans with lower-limb amputations to test static, dynamic, and functional postural stability. As part of the study, 17 Veterans were asked for qualitative feedback on the bimodal ankle-foot system (Table 1). The majority of participants (82%) expressed an interest in having an automatic mode. The participants also indicated that the automatic mode would need to reach walking mode on their first step and to lock the ankle quickly once the standing position was achieved. When asked about how they wanted to control the modes of the prosthesis, 82% wanted to use a physical switch and only 12% wanted to use a smartphone app. The results indicated that the following major design changes would be needed: 1) A fast and accurate automatic mode 2) A physical switch for mode changes This paper describes the use of machine learning algorithms to create an improved automatic mode and the use of stakeholder feedback to design a physical switch for the bimodal ankle-foot system.
APA, Harvard, Vancouver, ISO, and other styles
7

Amiot, David E., Rachel M. Schmidt, Angwei Law, Erich P. Meinig, Lynn Yu, Kathryn M. Olesnavage, Victor Prost, and Amos G. Winter. "Development of a Passive and Slope Adaptable Prosthetic Foot." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67947.

Full text
Abstract:
Historically, users of prosthetic ankles have relied on actively operated systems to provide effective slope adaptability. However, there are many drawbacks to these systems. This research builds upon work previously completed by Hansen et al. as it develops a passive, hydraulically operated prosthetic ankle with the capability of adapting to varying terrain in every step. Using gait cycle data and an analysis of ground reaction forces, the team determined that weight activation was the most effective way to activate the hydraulic circuit. Evaluations of the system pressure and energy showed that although the spring damper system results in a loss of 9J of energy to the user, the footplate stores 34J more than a standard prosthesis. Therefore, the hydraulic prosthetic provides a 54% increase in stored energy when compared to a standard prosthesis. The hydraulic circuit manifold prototype was manufactured and tested. Through proof of concept testing, the prototype proved to be slope adaptable by successfully achieving a plantarflexion angle of 16 degrees greater than a standard prosthetic foot currently available on the market.
APA, Harvard, Vancouver, ISO, and other styles
8

A. Ribeiro, G., and M. Rastgaar. "Prediction of Ground Profile for Lower-Leg Prosthesis Control Using a Visual-Inertial System." In 2018 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dmd2018-6962.

Full text
Abstract:
The field of control of powered lower-leg prostheses has advanced due to the improvements in sensors and computational power. Much effort has been done to improve the capabilities of prostheses, such as mimicking the stiffness, weight, and mobility of a human ankle-foot [1] and autonomously commanding the robotic prosthesis for gait [2].
APA, Harvard, Vancouver, ISO, and other styles
9

Ficanha, Evandro, Houman Dallali, and Mo Rastgaar. "Gait Emulator for Evaluation of a Powered Ankle-Foot Prosthesis." In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5089.

Full text
Abstract:
In this paper we present an enhanced gait emulator and a novel hybrid control system to test powered ankle-foot prostheses with two degrees of freedom in the sagittal and frontal planes. The gait emulator is a nonlinear and non-smooth system that has to follow a precisely timed set of phases to achieve a human-like periodic gait. Despite the complexity and parameter uncertainties of this five degrees of freedom system, our proposed hybrid control system simplifies the walking control by use of state triggered kinematic events. The control system works in closed loop with kinematic event detection to ensure robust and repeatable walking tests as design parameters are varied. The developed gait emulator can be used to test the prosthesis under various loading conditions and walking speeds.
APA, Harvard, Vancouver, ISO, and other styles
10

LaPrè, Andrew, and Frank Sup. "A Control Strategy for an Active Alignment Transtibial Prosthesis." In ASME 2015 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/dscc2015-9948.

Full text
Abstract:
This paper presents a control approach for an experimental transtibial prosthesis that can actively realign the residual limb in relation to prosthetic foot during the stance phase of gait. The realignment objective is to inject positive power into the gait cycle while actively reducing the magnitude of the sagittal moment transferred to the residual limb. The altered gait dynamics of this new type of prosthesis require a control approach that coordinates its function with a user’s gait cycle. This paper overviews the mechanical design of the prosthesis development, the proposed finite-state adaptive controller, and presents experimental results for constant cadence walking and adaptation while changing walking speeds.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Foot prosthesis' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography