Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 72 for “"Orthosis"”.
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Magneto-rheological fluid orthosis for suppressing tremor
… magnetic field. The wearable tremor suppressing orthosis needs several conditions. It should be safe, light weight, simple and small in structure, and easily attachable. An MR fluid orthosis satisfies these conditions. This thesis shows the physical properties of MR fluid and the basic concept of …
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A control-brake orthosis for FES-aided gait
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Design and control of an active ankle-foot orthosis
Active ankle-foot orthoses (AAFOs) assist a user unable to dorsiflex the ankle joint. The optimal AAFO is lightweight and aids the user in achieving a nominal gait. This thesis presents the design and control of a novel discrete nonlinear series elastic actuator for AAFOs. The actuator uses …
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Design of A Variable-Stiffness Ankle-Foot Orthosis Emulator
Ankle-foot orthoses (AFOs) are passive devices used to improve gait in children with cerebral palsy. They are characterized by a torsional stiffness and ankle neutral angle. For this project, a lightweight ankle exoskeleton was designed to emulate the spring-like behavior of a traditional AFO for a …
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Identification, Simulation and Control of an Ankle Foot Orthosis
… a torsional shape memory alloy-based ankle foot orthosis for drop foot disorder. The model has been developed in stages. First, a dynamic model of ankle in walking is developed using identification method. A dynamic model of torsional shape memory materials is then developed. In the final stage, …
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Development of an Industrially Deployable Personalized Ankle–Foot Orthosis System
… of a personalized, field-deployable ankle–foot orthosis (AFO) system designed to assist industrial tasks like squatting. Industrial workers frequently suffer from lower limb fatigue and musculoskeletal injuries due to repetitive lifting and squatting. While robotic AFOs have shown potential to …
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Evaluation of a pneumatic ankle-foot orthosis: portability and functionality
… has developed a pneumatically powered ankle-foot orthosis (PPAFO) to address some of these issues. In this dissertation, we address the issue of availability of portable pneumatic power sources, and we evaluate the short-term kinematic and metabolic impact of a bilateral, bidirectional portable …
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Control System for Outdoor Use of Powered Portable Ankle-Foot Orthosis
… exoskeleton, the Powered Portable Ankle-Foot Orthosis (PPAFO), designed to assist both individuals with motor disabilities and healthy subjects in various outdoor settings. The work begins by reviewing relevant literature and prior work in the field of gait analysis, embedded systems, and …
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Variable stiffness orthosis for gait normalization in patients with toe walking
… The addition of external heel support through an orthosis attached on the exterior of the heel of the shoe may help reduce this fatigue and correct the tip toe gait of DMD and ITW patients, enabling them to walk for longer distances unassisted. In order to study the effect of additional heel …
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Force-controllable ankle foot orthosis (AFO) to assist drop foot gait
… The current assistive device is the Ankle Foot Orthosis (AFO), which though offering some biomechanical benefits, is nonadaptive and fails to eliminate significant gait complications. An Active Ankle Foot Orthosis (AAFO) is presented where the impedance of the orthotic joint is modulated …
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Goal definition spreadsheet for the design of a damped wrist orthosis
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1989.
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The Application of Series Elastic Actuators in the Hydraulic Ankle-Foot Orthosis
… that fits into this trend is the Ankle-Foot Orthosis (AFO), which is a device that restrains or strengthens the movement of an ankle to assist the user during gait. A powered AFO uses an actuator and power supply to add positive power to the ankle but becomes heavier as the power output …
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Paraplegic standing and reciprocal gait using a floor reaction hybrid F.E.S. orthosis
… and initial evaluation of a new, hybrid FES orthosis for paraplegics. Secondly, it describes investigations which were intended to optimize the stimulus parameters used with the orthosis. One of the major limitations with pure FES standing and walking systems is rapid muscle fatigue. During …
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Effectiveness of a foot orthosis on muscular activity in functional ankle instability
… with FI. (2) Further, it was investigated if the orthosis intervention group demonstrate higher ankle muscle activity by additional short-term use of a measurement in-shoe orthosis (compared to short-term use of “shoe only”) after intervention. (3) As prerequisite, it was evaluated if ankle muscle …
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The Efficacy of a Forearm Rotation Orthosis for Persons with a Hemiparetic Arm
… the efficacy of a dynamic forearm rotation orthosis used as the sole intervention and in combination with the Occupational Therapy Task-Oriented (OTTO) approach as well as to evaluate the efficacy of the OTTO approach on the functional performance of persons post-stroke with a hemiparetic …
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On improving control and efficiency of a portable pneumatically powered ankle-foot orthosis
… developed the Portable Powered Ankle-Foot Orthosis (PPAFO), which uses pneumatic power via compressed CO2 to provide untethered ankle torque assistance. My dissertation work focused on the development of control strategies for the PPAFO that are robust, applicable to different gait …
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Design and analysis of fiber reinforced elastomeric enclosures with application in upper arm orthosis
… fabrication of a soft pneumatic sleeve for arm orthosis that uses a contracting FREE is shown. The sleeve is designed to reduce wrist loads in patients that use crutches for ambulation, thereby reducing the risk of joint injury. It forms an alternate load path between the crutch and the forearm, …
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A Novel Distractive and Mobility-Enabling Lumbar Spinal Orthosis for Treating Mechanical Low Back Pain
… prototype of dynamic mobility orthosis (DMO1) was designed that provided a distractive load across the lumbar spine but required higher sagittal bending moments and was unable to maintain spinal off-loading throughout extended ranges of movement. The research objectives were to …
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Experimental Analysis of Skull Remodeling and Change in Intracranial Volume with a soft Orthosis in Canine Models
… facial asymmetry. It can be managed with a hard orthosis, but maintaining an infant in a hard orthosis is often intolerable. We attempted to reform the shape of the young canine skull with a soft orthosis that is lighter in weight and less constricting than the conventional hard orthosis. …
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