Dr. Justin J. Scheidler Profile

Dr. Justin J. Scheidler

Research Engineer at NASA Glenn Research Ctr

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Publications (7)

Proceedings Article | 9 May 2024 Paper

Piezoelectric motor for cryogenic applications

Mircea Badescu, Yoseph Bar-Cohen, Stewart Sherrit, Hyeong Jae Lee, Nareg Shirajian, Luke Alvidrez, Justin Scheidler

Proceedings Volume 12949, 129490I (2024) https://doi.org/10.1117/12.3026845

KEYWORDS: Actuators, Ferroelectric materials, Vibration, Cryogenics, Transducers, Piezoelectric materials, Industrial applications, Finite element methods

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Expanding the capabilities that are used in the NASA’s exploration of planetary bodies in our solar system would require mechanisms and actuators that can operate at cryogenic temperatures (-240 °C to -60 °C) in dusty environments. These applications include the exploration of lunar surface environments with temperatures that are below -100 °C. For this purpose, the authors are working on developing piezoelectric motors capable of operating at such extreme conditions. Novel piezoelectric motors were conceived and are being investigated to enable precision deployment and motion mechanisms that can be used for potential actuation of antennas and solar arrays, lower power robot arms, and percussive drills. This motor technology is intended to be integrated in a testbed developed at NASA to demonstrate its capabilities once it has been characterized at room temperature. These motors are being developed as game changers for enabling rotational drive mechanisms (rovers, robots, gimbals, drills, etc.) in extremely cold and dusty environments. These drive systems will be operated without the use of heaters or atmospheric control chambers (which eliminates grease lubrication) to raise the actuator’s temperature. Further, these motors will enable actuation of very high precision mechanisms having lower power motion without gears or gear lubrication, backlash, or power consumption to hold position. These actuators contain piezoelectrically-excited fixtures that are vibrated out of phase such that they sequentially push the rotor to produce continuous rotation. A proof-of-concept linear actuator that uses fixtures with flexure-preloaded piezoelectric stacks and operates in an inch-worm configuration at low frequency has been developed and demonstrated. Further, a proof-of-concept rotary actuator is currently being developed that uses a V-shaped piezoelectric fixture driven in resonance that generates an elliptical motion at the horn tip to drive a rotor. In this paper, the latest progress will be presented.

Proceedings Article | 16 April 2016 Presentation + Paper

Experimental comparison of piezoelectric and magnetostrictive shunt dampers

Vivake Asnani, Zhangxian Deng, Justin Scheidler, Marcelo Dapino

Proceedings Volume 9801, 98010R (2016) https://doi.org/10.1117/12.2220302

KEYWORDS: Ceramics, Smart materials, Magnetism, Ferroelectric materials, Device simulation, Signal attenuation, Metals, Resistors

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Proceedings Article | 15 April 2016 Presentation + Paper

Vibration control via stiffness switching of magnetostrictive transducers

Justin Scheidler, Vivake Asnani, Marcelo Dapino

Proceedings Volume 9799, 979909 (2016) https://doi.org/10.1117/12.2219738

KEYWORDS: Vibration control, Switching, Magnetism, Transducers, Magnetostrictive materials, Vibration simulation, Vibration isolation, Switches, Control systems, Lawrencium, Active vibration control, Complex systems

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Proceedings Article | 1 April 2015 Paper

Design and testing of a dynamically tuned magnetostrictive spring with electrically controlled stiffness

Justin Scheidler, Vivake Asnani, Marcelo Dapino

Proceedings Volume 9433, 94330F (2015) https://doi.org/10.1117/12.2085574

KEYWORDS: Magnetism, Prototyping, Transducers, Magnetostrictive materials, Manufacturing, Computer aided design, Sensors, Magnetic sensors, Inductance, Calibration

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Proceedings Article | 1 April 2015 Paper

Dynamic characterization of Galfenol

Justin Scheidler, Vivake Asnani, Zhangxian Deng, Marcelo Dapino

Proceedings Volume 9432, 94320J (2015) https://doi.org/10.1117/12.2085573

KEYWORDS: Magnetism, Solids, Magnetic sensors, Sensors, Calibration, Electronics, Protactinium, Electromagnetism, Tolerancing, Visualization

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Proceedings Article | 10 March 2014 Paper

Stiffness tuning of FeGa structures manufactured by ultrasonic additive manufacturing

Justin Scheidler, Marcelo Dapino

Proceedings Volume 9059, 905907 (2014) https://doi.org/10.1117/12.2046247

KEYWORDS: Additive manufacturing, Composites, Ultrasonics, Magnetism, Electroluminescent displays, Solid state physics, Feedback control, Shape analysis, Beam shaping, Manufacturing

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Proceedings Article | 29 March 2013 Paper

Nonlinear dynamic model for magnetically-tunable Galfenol vibration absorbers

Justin Scheidler, Marcelo Dapino

Proceedings Volume 8690, 869002 (2013) https://doi.org/10.1117/12.2010114

KEYWORDS: Composites, Magnetism, Magnetostrictive materials, Ultrasonics, 3D modeling, Additive manufacturing, Smart materials, Aluminum, Nonlinear dynamics, Metals

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Showing 5 of 7 publications

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