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 18 of 18 for “"Pantograph"”.
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Modeling and simulation of pantograph-catenary systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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An experimental and analytical study of pantograph dynamics
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Improvement of a pantograph for high-speed trains
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.
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Modelling and experimentation of pantograph dynamics by George C. Vesely.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
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Design of an Underactuated Lower Body Exoskeleton Using a Pantograph
This paper presents the design of an underactuated lower body exoskeleton to assist with walking. It reduces the amount of bodyweight going through the user's leg by providing a supporting force to the user that is engaged and disengaged depending on the stage of the gait cycle the user is in. It …
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Modeling and dynamics of pantograph/catenary systems for high speed trains
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1983.
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Verification of the Accuracy of Electronic Mandibular Movement Recording Devices: : An in vitro investigation
… relevant conditions.</p> <p>The primary use of a pantograph is to record patient mandibular border movement and program an articulator so that the movements of the articulator simulate the border movements of the patient. The objectives of this four part investigation was to assess the accuracy of …
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Simulation and Design of Two Tool Support Arm Exoskeletons with Gravity Compensation
… and analyze two arm exoskeletons based on a pantograph linkage that allow for the support of 89~N (20~pounds) at the user's hand. Using a pantograph linkage allows for a constant force to be created at the hand in any orientation when a constant vertical force is supplied to the other side of …
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A Novel Method and Two Exoskeletons for Whole-arm Gravity Compensation
… of position. This support is provided with a pantograph. The upper-arm and forearm bars are mirrored by smaller copies. Force applied to a pull point on the scaled copy of the arm is flipped and applied at a support point on the forearm or to a tool near the hand. Two exoskeletons, using …
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Continuous gauging of electric traction contact wire
… produces a collimated beam of light along the pantograph pan. The beam, through which the contact wire slides, is monitored by a vertical array of phototransistors spaced at equal intervals. The number of phototransistors in shadow at any instant is proportional to the contact wire thickness. A …
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Design and Evaluation of an Underactuated Lower Body Exoskeleton
… uses one motor per leg and makes use of a pantograph to reduce the overall profile and allow the exoskeleton to closely follow the shape of the user's leg. Support is provided between the ball of the user's foot and their waist by compressing a spring in parallel with the user's leg during …
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Wavelets operational methods for fractional differential equations and systems of fractional differential equations
… of Emden-Fowler type, a class of generalized Pantograph equations and Delay differential systems. A new operational matrix of fractional order derivative and integration based on this polynomial was also developed and used together with collocation method to solve FDEs, systems of FDEs and …
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Synthesis and Design of a Bimodal Rotary Series Elastic Actuator
… The clutch was a drum brake actuated with a pantograph linkage and ACME lead screw. This configuration produced 11 Nm of holding torque experimentally but was theoretically shown to produce up to 51.4 Nm with larger motors. The elastic element was designed using finite element analysis (FEA) …
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The use of farm maps in teaching agriculture
… consisting of pencil, scale, pen, protractor, pantograph, ruler, T-Square, and drawing boards; the pencil and scale being most commonly used. 6. Many difficulties are enoountered in the preparation of the maps, one or more being listed by 96 per cent of the departments reporting in the study. …
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Kontaktvorgänge und Verschleißverhalten des Systems Fahrdraht - Schleifleiste
Der Kontakt Fahrdraht - Schleifleiste hat die Aufgabe, elektrischen Strom zwischen der Oberleitung und dem Stromabnehmer des Triebfahrzeuges mittels eines Gleitkontaktes zu übertragen. Das Kontaktverhalten und der dabei entstehende Verschleiß sind von einer Vielzahl von Parametern und …
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Design and Control of Two Under-Actuated Upper Body Exoskeletons for Augmenting Human Capabilities in Lifting
Exoskeletons are getting popular day by day due to their abilities in helping people. Exoskeletons can be used to help people gain motor senses through rehabilitation. It can also help healthy people to augment their abilities. These exoskeletons need to be strong yet light, so that the human body …
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Concepts for retractable roof structures.
… chosen is formed by a two-dimensional ring of pantographic bar elements interconnected through simple revolute hinges. A concept for retractable roofs is then proposed by covering the bar elements with rigid cover plates. To prevent the cover plates from inhibiting the motion of the structure a …
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Analýza jisté třídy zpožděných diferenciálních rovnic
Tato práce se zabývá analýzou jisté třídy zpožděných diferenciálních rovnic. Nejprve je uvedeno několik potřebných poznatků týkajících se diferenciálních rovnic se zpožděným argumentem. Dále je představena samotná studovaná třída rovnic a formulováno poměrně jednoduché kritérium představující …