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Journal Articles

Dynamic Modeling of Spatially Varying Shape Memory Alloy Unimorph Actuators

Scott Kennedy, Nicholas Vlajic, Edmon Perkins
Journal: ASME Letters in Dynamic Systems and Control
Publisher: ASME
Article Type: Research Papers
Letters Dyn. Sys. Control. July 2024, 4(3): 031009.
Paper No: ALDSC-24-1008
https://doi.org/10.1115/1.4066314
Published Online: September 13, 2024
View Article titled, Dynamic Modeling of Spatially Varying Shape Memory Alloy Unimorph Actuators
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Topics: Actuators, Shape memory alloys, Modeling, Wire
Proceedings Papers

Effect of Sensor Failure on Dynamometry Calibration

Nicholas Vlajic, Michael Jonson, Manton Guers
Proc. ASME. IMECE2020, Volume 1: Acoustics, Vibration, and Phononics, V001T01A009, November 16–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-24264
https://doi.org/10.1115/IMECE2020-24264
View Paper titled, Effect of Sensor Failure on Dynamometry Calibration
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Topics: Calibration, Failure, Sensors, Dynamometers, Gages, Stress, Degrees of freedom, Errors, Fluids, Hammers
Proceedings Papers

Error Quantification in Dynamic Applications of Weakly Nonlinear Transducers

Lautaro Cilenti, Akobuije Chijioke, Nicholas Vlajic, Balakumar Balachandran
Proc. ASME. IDETC-CIE2020, Volume 2: 16th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC), V002T02A046, August 17–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: DETC2020-22137
https://doi.org/10.1115/DETC2020-22137
View Paper titled, Error Quantification in Dynamic Applications of Weakly Nonlinear Transducers
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Topics: Errors, Transducers, Calibration, Degrees of freedom, Dynamics (Mechanics), Excitation, Linear systems, Time series, Transients (Dynamics)
Journal Articles

Parameter Identification in a Magnetic Suspension Force Transduction System

Corey Stambaugh, Patrick Abbott, Nicholas Vlajic
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. December 2019, 141(12): 124503.
Paper No: DS-18-1340
https://doi.org/10.1115/1.4044646
Published Online: September 24, 2019
View Article titled, Parameter Identification in a Magnetic Suspension Force Transduction System
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Topics: Magnetic fields, Magnetic levitation, Magnets, Control equipment
Journal Articles

Nanometer Positional Control Using Magnetic Suspension for Vacuum-to-Air Mass Metrology

Nicholas Vlajic, Melissa Davis, Corey Stambaugh
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. December 2018, 140(12): 121003.
Paper No: DS-17-1490
https://doi.org/10.1115/1.4040504
Published Online: July 2, 2018
View Article titled, Nanometer Positional Control Using Magnetic Suspension for Vacuum-to-Air Mass Metrology
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Topics: Magnetic levitation, Simulation, Vacuum, State feedback, Instrumentation, Metrology, Control equipment, Noise (Sound)
Proceedings Papers

Impact Mechanics Parametric Studies With Applications to Dynamic Force Calibration

Nicholas Vlajic, Ako Chijioke
Proc. ASME. IDETC-CIE2017, Volume 6: 13th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, V006T10A006, August 6–9, 2017
Publisher: American Society of Mechanical Engineers
Paper No: DETC2017-67893
https://doi.org/10.1115/DETC2017-67893
View Paper titled, Impact Mechanics Parametric Studies With Applications to Dynamic Force Calibration
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Topics: Calibration, Transducers, Modal analysis
Proceedings Papers

Modelling the Response of Force Transducers Under Sine-Sweep Calibration

Nicholas Vlajic, Ako Chijioke
Proc. ASME. IDETC-CIE2015, Volume 8: 27th Conference on Mechanical Vibration and Noise, V008T13A055, August 2–5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-47820
https://doi.org/10.1115/DETC2015-47820
View Paper titled, Modelling the Response of Force Transducers Under Sine-Sweep Calibration
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Topics: Calibration, Modeling, Transducers, Frequency response, Energy dissipation, Excitation, Stiffness
Journal Articles

State-Dependent Delay Influenced Drill-String Oscillations and Stability Analysis

Xianbo Liu, Nicholas Vlajic, Xinhua Long, Guang Meng, Balakumar Balachandran
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research-Article
J. Vib. Acoust. October 2014, 136(5): 051008.
Paper No: VIB-13-1394
https://doi.org/10.1115/1.4027958
Published Online: July 25, 2014
View Article titled, State-Dependent Delay Influenced Drill-String Oscillations and Stability Analysis
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Topics: Delays, Drill strings, Dynamics (Mechanics), Stability, Drilling, Vibration, Bits (Tools), Torsion
Proceedings Papers

State-Dependent Delay Influenced Drill String Dynamics and Stability Analysis

Xianbo Liu, Nicholas Vlajic, Xinhua Long, Guang Meng, Balakumar Balachandran
Proc. ASME. IDETC-CIE2013, Volume 7B: 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, V07BT10A065, August 4–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: DETC2013-12904
https://doi.org/10.1115/DETC2013-12904
View Paper titled, State-Dependent Delay Influenced Drill String Dynamics and Stability Analysis
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Topics: Delays, Drill strings, Dynamics (Mechanics), Stability, Waves, Torsion, Discrete systems, Drilling, Dry friction, Engineering simulation
Journal Articles

Draft: Stick-Slip Motions of a Rotor-Stator System

Nicholas Vlajic, Chien-Min Liao, Hamad Karki, Balakumar Balachandran
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research-Article
J. Vib. Acoust. April 2014, 136(2): 021005.
Paper No: VIB-12-1078
https://doi.org/10.1115/1.4025994
Published Online: December 16, 2013
View Article titled, Draft: Stick-Slip Motions of a Rotor-Stator System
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Topics: Dry friction, Rotors, Stators, Stick-slip, Vibration, Whirls, Drill strings
Proceedings Papers

Rotor Torsion Vibrations in the Presence of Continuous Stator Contact

Nicholas Vlajic, Xianbo Liu, Hamad Karki, Balakumar Balachandran
Proc. ASME. IMECE2012, Volume 4: Dynamics, Control and Uncertainty, Parts A and B, 785-794, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-89195
https://doi.org/10.1115/IMECE2012-89195
View Paper titled, Rotor Torsion Vibrations in the Presence of Continuous Stator Contact
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Topics: Dry friction, Rotors, Stators, Stick-slip, Torsion, Vibration, Whirls
Proceedings Papers

Stick-Slip and Whirl Motions of Drill Strings: Numerical and Experimental Studies

Nicholas Vlajic, Chien-Min Liao, Hamad Karki, Balakumar Balachandran
Proc. ASME. IDETC-CIE2011, Volume 4: 8th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A and B, 829-838, August 28–31, 2011
Publisher: American Society of Mechanical Engineers
Paper No: DETC2011-47949
https://doi.org/10.1115/DETC2011-47949
View Paper titled, Stick-Slip and Whirl Motions of Drill Strings: Numerical and Experimental Studies
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Topics: Drill strings, Stick-slip, Whirls