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 13 of 13 for “"electromagnetic actuator."”.
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A multi finger electromagnetic actuator apparatus for biomechanical studies on the hand
… device powered by electromechanical voice-coil actuators. Five actuators were designed and constructed and a position and force feedback control system was implemented for each. The maximum continuous force output for each actuator ranged from 12-16 N, which is about 15%-30% of the maximum force …
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High bandwidth rotary fast tool servos and a hybrid rotary/linear electromagnetic actuator
… fast tool servos and the hybrid rotary/linear electromagnetic actuator developed for one of them. Design insights, trade-off methodologies, and analytical tools are developed for precision mechanical systems, power and signal electronic systems, control systems, normal-stress electromagnetic …
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Exploring and evaluating methods of actuating an active lens
… methods of active lens actuation: using an electromagnetic actuator and using an electroactive polymer. From testing each method's abilities, it was found that the electromagnetic actuator, though robust in design poses issues over long-time use. The electromagnetic actuator was able to …
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Active control of an automobile suspension system for reduction of vibration and noise
… on each of the front suspension control arms. An electromagnetic actuator was designed, built, and tested on a Lincoln LS with simulated roads noise. The actuator applies a force across the point 4 bushing, in response to accelerations of the vehicle frame, just inboard of the bushing, with the …
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Design and parametric simulation of radially oriented electromagnetic actuators
… thesis presents the design and simulation of an electromagnetic actuator system capable of delivering large pulses of radial force onto a cylindrical surface. Due to its robust design, simple control scheme, and large output force capability, the actuator design is developed to be considered for …
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An electromechanical valve drive incorporating a nonlinear mechanical transformer
… is the VVA operated by an electromechanical actuator without a camshaft, the so-called bi-positional electromechanical valve drive (EMVD). Existing EMVDs characteristically use a spring to provide the required mechanical power for operating a valve. The use of a spring provides many benefits …
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Active control of floor vibrations
… of the floor to compute the input signal to an electromagnetic actuator which, by the movement of the actuator reaction mass, supplies a force that reduces the transient and resonant vibration levels. Included in the analytical component of this research is the development of a mathematical …
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Novel Smart Actuation Systems for Single-port Laparoscopic Surgical Instruments
… then developed, which are namely a latching-type electromagnetic actuator, a soft dielectric elastomer spring roll actuator and a novel hydraulic actuation system. Advanced theoretical and numerical design and assessment techniques were utilised in the development of these smart actuation systems …
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Development of a Visual Demonstration Platform for Parallel Evaluation of Active Suspension Systems
… the introduction of active components, such as actuators and semiactive dampers, coupled with dynamic control strategies, a more desirable compromise between the benefits of soft and stiff suspensions can be achieved. The purpose of this research is not to create a better suspension, but to …
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Active vibration control for a free piston stirling engine with linear alternator FPSE/LA
… and the suitable control strategies using an electromagnetic actuator, namely a linear voice coil motor (VCM). Starting with a validated vibration model of the engine based on two degrees of freedom system (2-DOF), two control techniques, Feedforward/Zero-Placement control with …
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Progresivní zařízení pro tvorbu mikrovtisků
Diplomová práce se zabývá konstrukčním návrhem, realizací a kalibrací zařízení pro tvorbu mikrovtisků na zkušebních vzorcích. Mikrovtisky jsou vytvářeny vtlačo-váním hrotu s diamantovou špičkou. Pro vtlačování je použit elektromagnetický lineární aktuátor. Posunutí a rotace vzorku jsou zajištěny …
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Fabrication et caractérisation de micro moteurs Stirling à pistons libres, pour la récupération d’énergie thermique à basse température
Ce mémoire expose le travail réalisé dans le cadre de la mise en oeuvre de micromoteurs à pistons libres fonctionnant selon le cycle de Stirling, pour la valorisation d’énergie thermique à basse température (T< 200° C). Ce moteur prend une forme planaire, s’insérant entre une source et un puits de …