Results 181 to 190 of about 148,529 (236)
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Electromechanical Actuation Development
1978Abstract : Electromechanical actuation of primary flight control surfaces has been demonstrated by the development of an integrated rotary hinge-line dual- redundant actuation unit. The characteristics of the developed hardware closely correlate with the design predictions.
Robert A. Lewis, Neal E. Wood
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Control of an electromechanical camless valve actuator
Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301), 2003This paper addresses the modeling analysis and soft seating control of an electromagnetic actuator used in electromechanical camless valve-trains. Our mathematical modeling analysis reveals the instability of the actuator dynamics linearized around the seating position and zero velocity.
Chun Tai, Tsu-Chin Tsao
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Distributed parameters model of electromechanical actuator
Proceedings of the Fifth International Workshop on Robot Motion and Control, 2005. RoMoCo '05., 2005In this paper is considered modelling of voltage forced electromechanical actuator taking friction and spring stiffness into account. 3D distributed parameters model including eddy current phenomena and magnetic non-linearity is presented. In numerical example a motion of movable armature is presented.
Slawomir Stepien, A. Turkot
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Electromechanical microswitches with thermal actuation
2002 International Microprocesses and Nanotechnology Conference, 2002. Digest of Papers., 2002Conventional, semiconductor based electronics has its limitations in harsh environments, e.g. operation at low or high temperatures. micro- or nanomechanical switching elements may be an alternative to be used in logic circuits provided that they can be made small and fast enough for useful data processing.
Ketterer, B. +6 more
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Dynamics of the Apollo electromechanical actuator.
Journal of Spacecraft and Rockets, 1968This paper deals witli^Ii^^Mnear dynamics of the servo system that is used to control the gimbal position of the service propulsion engine of the Apollo service module. Particular attention is given to the actuator that is the major component of the system.
G. E. TUTT, J. A. JANSEN
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Mechanism of electromechanical actuation in polypyrrole
Synthetic Metals, 1995Conductive polymers, such as polypyrrole (PPy), undergo unusual mechanical responses when subjected to applied electrical potentials. This study reports on investigations into the molecular mechanisms of such responses in PPy, with specific reference to the role of the counterion and electrolyte cation.
M.R. Gandhi +3 more
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Ferroelectric perovskites for electromechanical actuation
Acta Materialia, 2003There has been a recent surge of activity in ferroelectric materials motivated by the desire for materials capable of large strains for actuator applications. New materials have been developed and systematic attempts to exploit underlying domains have been pursued.
Bhattacharya, K., Ravichandran, G.
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Electromechanical Flight Control Actuation
SAE Technical Paper Series, 1977<div class="htmlview paragraph">The new rare-earth sammarium-cobalt magnets are revolutionizing electromechanical actuation design to the extent that power-by-wire can be a legitimate follow-on to fly-by-wire. These new magnets coupled with innovative design techniques which feature direct interface with fly-by-wire are creating electromechanical
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Ferroelectric actuators in the electromechanical interface
Optical Engineering, 1990The function of a control system is to convert an operator cornmand into an electrical signal, to convert the electrical signal into a mechanical response, and to verify that the mechanical response achieves and maintains the desired level. A vital element in this interface is the electromechanical actuator.
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