Superconducting linear actuator [PDF]
Special actuators are needed to control the orientation of large structures in space-based precision pointing systems. Electromagnetic actuators that presently exist are too large in size and their bandwidth is too low.
Hockney, Richard, Johnson, Bruce
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Design and Control of a Dual-Stage Actuation Active Vibration Isolation System
IEEE Access, 2019 Active vibration isolation system is used in various fields to reduce the vibrations transmitted. In this paper, a novel dual-stage actuator is proposed, which combines a voice coil motor and a piezoelectric actuator.
Bo Zhao, Weijia Shi, Jiubin Tan
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Magnetic suspension actuator concepts and applications [PDF]
The fundamental aspect which makes magnetic suspension systems possible is the magnetic phenomena by which significant forces can be generated. Each of these force-producing phenomena has unique characteristics and is implementable in a unique fashion ...
Kroeger, John
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The First Spanish Short Wave Stations. Development of Radio & Tv Technology [PDF]
, 2010 In the thirties in Spain there were three big Short Wave Stations. One, belonging to Transradio Española in Aranjuez, 50 kilometers south of Madrid, which rendered radiotelegraphic services to the Canary Islands, Europe and America. Another, belonging to
Romeo Lopez, Jose M.
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Vibration control with thin-film-coil actuator for head-positioning system in hard disk drives
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015 In a head-positioning system of hard disk drives, various mechanical resonances may degrade performance or stability of the control system. In these mechanical resonances, a torsional mode of a head-stack assembly (HSA), in which a resonant frequency is ...
Takenori ATSUMI +3 more
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Design of linear voice coil motor with semi‐closed structure
IET Electric Power Applications, 2019 A Halbach permanent magnet (PM) tubular linear voice coil motor (LVCM) with a semi‐closed structure is developed to enhance the thrust density in this study. Generally, the end of conventional LVCM is open and suffers from the considerable end reluctance.
Ciyong Luo, Zhonglan Lin, Jun Sun
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Investigation of kinesthetic illusion of biceps brachii muscle using a miniature voice coil motor
Journal of Advanced Mechanical Design, Systems, and ManufacturingThe kinesthetic illusion (KI) is a phenomenon in which transcutaneous vibration stimulation applied to a tendon induces the illusion of body movement. This phenomenon has potential applications in rehabilitation and virtual reality (VR).
Hiraku KOMURA +3 more
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The JPL Phase B interferometer testbed [PDF]
Future NASA missions with large optical systems will require alignment stability at the nanometer level. However, design studies indicate that vibration resulting from on-board disturbances can cause jitter at levels three to four orders of magnitude ...
Eldred, Daniel B., Oneal, Mike
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Optimal analysis, design and testing of an electromagnetic damper with resonantshunt circuit for vibration control of a civil structure [PDF]
, 2017 Control of vibration serviceability problems in civil engineering structures has received considerable attention in recent years. Most of this has been focused on classical technologies such as tuned mass dampers, viscous dampers, viscoelastic dampers ...
Ao, WK, Reynolds, P
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Design and Performance Evaluation of a Hybrid Flux-Path Limited-Angle Torque Motor
MachinesTorque motors are typically operated within a limited angular range and are widely used in high-precision control applications due to their ability to provide uniform torque throughout the operating region.
Ho-Young Lee, Soon-O Kwon, Min-Ro Park
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