Publications related to Fundamental frequency

Rotor Design Optimization for a Reaction Sphere Actuator

This paper presents the rotor design optimization for a reaction sphere (RS) actuator. The RS is a permanent-magnet synchronous spherical actuator whose rotor is magnetically levitated and can be accelerated about any desired axis. The RS is composed of an ...

Institute of Electrical and Electronics Engineers2014

Passive phase noise cancellation element

Luis Guillermo Villanueva Torrijo

A passive electro-mechanical device that reduces phase noise in oscillators, thereby improving their frequency precision. The noise reduction device can consist of a pair of coupled nonlinear resonators that are driven parametrically-by modulating their na ...

2014

A Ball-Screw Driven Motorized Hip Orthosis

Hannes Bleuler, Reymond Clavel, Mohamed Bouri, Jeremy Olivier, Amalric Louis Ortlieb

In this paper we present a motorized hip orthosis to assist elderly people while walking, stair climbing and during the sit-to-stand transitions. The design is based on biomechanics considerations. Ranges of motion, velocities and torques of the hip joint ...

2014

Augmenting Second Harmonic Generation Using Fano Resonances in Plasmonic Systems

Olivier Martin, Jérémy Butet, Krishnan Thyagarajan

Significant augmentation of second harmonic generation using Fano resonances in plasmonic heptamers made of silver is theoretically and experimentally demonstrated. The geometry is engineered to simultaneously produce a Fano resonance at the fundamental wa ...

Amer Chemical Soc2013

Source/Filter Factorial Hidden Markov Model, with Application to Pitch and Formant Tracking

Jean-Philippe Thiran

Tracking vocal tract formant frequencies (

f_p

) and estimating the fundamental frequency (

f_0

) are two tracking problems that have been tackled in many speech processing works, often independently, with applications to articulatory parameters estimation ...

Institute of Electrical and Electronics Engineers2013

Nonlinearity in nanomechanical cantilevers

Luis Guillermo Villanueva Torrijo

Euler-Bernoulli beam theory is widely used to successfully predict the linear dynamics of micro-and nanocantilever beams. However, its capacity to characterize the nonlinear dynamics of these devices has not yet been rigorously assessed, despite its use in ...

American Physical Society2013

Sustained Nano-Mechanical Oscillation of a Resonant-Body Transistor by Frequency-Modulated Heterodyne Phase-Locked-Loop

Mihai Adrian Ionescu, Alexandru Rusu, Sebastian Thimotee Bartsch

Many applications based on resonant nanoelectromechanical systems (NEMS) require monitoring their natural frequency of oscillation over time with high precision, e.g. for gas sensing or nanomechanical mass spectrometry. In this study, we integrate a very-h ...

2013

Nonlinear plasmonics of metallic heptamers

Olivier Martin, Krishnan Thyagarajan, Simon Rivier

Second-harmonic generation (SHG) from centrosymmetric nanostructures originating from the breaking of inversion symmetry at their surfaces is a well-known phenomenon and is extensively used as a surface probe in nonlinear optical microscopy. In recent year ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2012

Analysis of the dynamic response of pump-turbine runners- Part I: Experiment

François Avellan, Mohamed Farhat, Xiaopeng Huang, Eduard Egusquiza

When in operation, pump-turbine runners have to withstand large pressure pulsations generated by the rotor-stator interaction. The analysis of the dynamic behavior of these structures is necessary to avoid damage. For this analysis a realistic model of the ...

International Association For Hydraulic Research2012

Gas mixing enhancement in minichannels using a rotationally oscillatory circular cylinder

Mohsen Cheraghi

Oscillating structures and actuators can induce flow kinematics that enhances mixing. This approach is specifically effective for mixing enhancement in meso-scale channels, where the flow kinematics can be actively controlled using micro-electro-mechanical ...

2012

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Rotor Design Optimization for a Reaction Sphere Actuator

Passive phase noise cancellation element

A Ball-Screw Driven Motorized Hip Orthosis

Augmenting Second Harmonic Generation Using Fano Resonances in Plasmonic Systems

Source/Filter Factorial Hidden Markov Model, with Application to Pitch and Formant Tracking

Nonlinearity in nanomechanical cantilevers

Sustained Nano-Mechanical Oscillation of a Resonant-Body Transistor by Frequency-Modulated Heterodyne Phase-Locked-Loop

Nonlinear plasmonics of metallic heptamers

Analysis of the dynamic response of pump-turbine runners- Part I: Experiment

Gas mixing enhancement in minichannels using a rotationally oscillatory circular cylinder

Nonlinear plasmonics of metallic heptamers

Sustained Nano-Mechanical Oscillation of a Resonant-Body Transistor by Frequency-Modulated Heterodyne Phase-Locked-Loop

Augmenting Second Harmonic Generation Using Fano Resonances in Plasmonic Systems

Nonlinearity in nanomechanical cantilevers

Analysis of the dynamic response of pump-turbine runners- Part I: Experiment

Gas mixing enhancement in minichannels using a rotationally oscillatory circular cylinder

Rotor Design Optimization for a Reaction Sphere Actuator

Passive phase noise cancellation element

A Ball-Screw Driven Motorized Hip Orthosis

Source/Filter Factorial Hidden Markov Model, with Application to Pitch and Formant Tracking