Results 141 to 150 of about 698 (181)
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Electromagnetic actuator for voice coil
The Journal of the Acoustical Society of America, 1979An electromagnetic actuator for linear driving of movable heads of a magnetic disc unit in an information processing system. A plurality of slits or plates are provided with a magnetic pole inscribed directly on the internal surface of a permanent magnet, and increase magnetic reluctance of the magnetic path and reduce inductance of a moving coil, thus
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Modeling Voice Coil Actuators with Recurrent Neural Network
2018 IEEE 27th Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS), 2018In order to accurately model the behaviors of a voice coil actuator (VCA), three-dimensional (3-D) simulation is preferred over a lumped model. However, the 3-D simulation for a VCA can be very computationally expensive, which is due to the spatial discretization, the multiphysics nature, and the nonlinearities of the VCA system.
Tianjian Lu +4 more
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A High Performance Voice Coil Actuator for Optomechatronic Applications
Journal of Mechanisms and Robotics, 2017Voice coil actuators (VCAs) are simple electro-mechanical devices, which are capable of generating linear motion in response to an electrical input. The generic cylindrical design of commercially available actuators imposes a large variety of limitations on the end user.
Dion Hicks +2 more
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Dynamic Modeling of Voice Coil Motor-Actuated Flexible Membranes
Volume 2: Intelligent Transportation/Vehicles; Manufacturing; Mechatronics; Engine/After-Treatment Systems; Soft Actuators/Manipulators; Modeling/Validation; Motion/Vibration Control Applications; Multi-Agent/Networked Systems; Path Planning/Motion Control; Renewable/Smart Energy Systems; Security/Privacy of Cyber-Physical Systems; Sensors/Actuators; Tracking Control Systems; Unmanned Ground/Aerial Vehicles; Vehicle Dynamics, Estimation, Control; Vibration/Control Systems; Vibrations, 2020Abstract In this paper, we derive a dynamical model for a controllable flexible membrane which is point-actuated by distributed voice coil motors (VCM) connected to it. Besides the modal analysis of the membrane motion, which is the only dynamics discussed in most of related published works treating external pressures as inputs, we ...
Hongyang Shi +6 more
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Atomic force microscopy using voice coil actuators for vibration isolation
2015 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), 2015This paper presents a vibration isolation system integrated with the internal actuators of an atomic force microscope (AFM) to vertically move the probe. For the motion, voice coil actuators (Lorentz actuators) are guided by low-stiffness flexures. Due to the low stiffness, the vibrations from the floor to the probe are decoupled at high frequencies ...
Shingo Ito +4 more
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A Review of Flexure Motion in Piezoelectric Actuators and Voice Coil Actuators
Applied and Computational EngineeringTo design a flexible work platform capable of accommodating large travel distances while maintaining high-precision positioning, traditional drive mechanisms have proven inadequate in addressing the evolving demands of emerging technological fields. Consequently, advancements in drive mechanisms have become essential, prompting continuous updates and ...
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Shorted turn effects in rotary voice coil actuators
IEEE Transactions on Magnetics, 1996The response of a voice coil motor (VCM) with a moving shorted turn is examined in both the frequency and time domains. The shorted turn modifies the low frequency behavior of both the impedance and the transfer function between coil current and VCM torque; the voltage to VCM torque transfer function is minimally affected.
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2016 IEEE International Conference on Robotics and Automation (ICRA), 2016
Among legged robots, hopping and running robots are useful because they can traverse terrain at high speeds and are a benchmark platform for locomotion actuators; if an actuator can power a hopping robot, it can power a walking robot. We aim to create a hopping mechanism for a small-scale, one-legged, untethered hopping robot.
Zachary Batts +2 more
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Among legged robots, hopping and running robots are useful because they can traverse terrain at high speeds and are a benchmark platform for locomotion actuators; if an actuator can power a hopping robot, it can power a walking robot. We aim to create a hopping mechanism for a small-scale, one-legged, untethered hopping robot.
Zachary Batts +2 more
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Slaving and disabling actuators with voice-coil adaptive mirrors
2020Adaptive mirrors based on voice-coil technology have force actuators with an internal metrology to close a local loop for controlling its shape in position. When actuators are requested to be disabled or slaved, control matrices have to be re-computed. The report describes the algorithms to re-compute the relevant matrixes for controlling of the mirror
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Axially focused radial magnet voice coil actuator
The Journal of the Acoustical Society of America, 1997A voice coil actuator (10) has a magnetic flux conductive material core (12), an axially focused, radially oriented magnet structure (14), and an electrical current conductive coil (16). The core has a first surface (18) and a continuous channel (20) disposed in the first surface.
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