Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"resonant peak"”.
-
Active Vibration Isolation Using an Induced Strain Actuator with Application to Automotive Seat Suspensions
… with an isolation frequency of 2Hz and no resonant peak, versus 6Hz and a resonant peak of 2g/g for an actual passenger seat tested.
-
Multi-resonant Electromagnetic Shunt in Base Isolation for Vibration Damping and Energy Harvesting
… energy by using an optimally configured multi-resonant electromagnetic shunt in base isolation. In this research, two multi-resonant shunt configurations, parallel and series, were proposed and optimized based on the H2 criteria when the base isolation system is subjected to ground acceleration …
-
Identifiability and parameter estimation in rail vehicle dynamics
… natural frequency, and ten percent for the peak amplitude. Excellent agreement with the experimental data was obtained for frequencies above the resonant peak and for very low frequencies. Error at frequencies slightly below the resonant peak, however, indicated the vehicle contained …
-
Electron Transport through Carbon Nanotube Quantum Dots in A Dissipative Environment
… phase transition in a very basic system: a resonant level coupled to a dissipative environment. Specifically, the resonant level is formed by a quantized state in a carbon nanotube, and the dissipative environment is realized in resistive leads; and we study the shape of the resonant peak by …
-
Fabrication of intensity-based Long-Period-Gratings fiber sensor with CO2 Laser
… power attenuation of more than 15 dB at the resonant peak of 1402 nm under deposition of Ionic Self-Assembled Monolayer (ISAM) thin film that is around 50 nm in thickness. When tuned to its maximum sensitivity region, this LPG has shown a transmission power reduction of 79% with the …
-
Unified interpretation of nonlinear elasticity in granular solids, A
… including (a) the log-time recovery of the resonant frequency after the deformation ends (slow dynamics), (b) asymmetric resonance curves in the direction of the driving frequency, (c) the difference between resonance curves when the driving frequency is swept upward and downward, and (d) …
-
System modeling and modification via modal analysis
… modification and are, therefore, included. A resonant peak can be shifted to another frequency by making certain modifications to the structure, thus avoiding undesired vibration. The resonance specification will determine the amount of physical change needed. It is not practical to store all …
-
A systematic study of ion-induced nanopatterning on photonic crystal-based label-free optical biosensor
… that irradiation caused a blue-shift in optical resonant peak wavelength, probably due to a decrease in film thickness by sputtering. Nevertheless, the peaks remained sharp and intense enough to be distinguishable from the background signal in most cases, implying the sensor’s ability to detect …
-
The Convergence of Parametric Resonance and Vibration Energy Harvesting
… resonance, which, unlike the former, its resonant amplitude growth does not saturate due to linear damping. Therefore, parametric resonance, when activated, has the potential to accumulate much more energy than direct resonance. The vibrational nonlinearities that are almost always …
-
Flat optics based on patterned nanostructures for concentrating light
… plasmonic nanostructures that exhibit individual resonant peaks within each region and a third collective resonant peak at their boundary. Finally, in the case of planar concentrators based on dielectric nanostructured surfaces, we explored designing these structures as planar focusing collectors …
-
X-ray microscope performance enhancement through control architecture change
The goal of this thesis is to apply control algorithms to improve the performance of nanopositioning devices used on the beamline in Advanced Photon Source (APS) at Argonne National Laboratory (ANL). A prototype device, better known as the Early User Instrument (EUI) was the subject of this work. …