Sökning: "beam resonators"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden beam resonators.

  1. 1. Numerical study of a vibroacoustic wave trap for e-vehicles

    Master-uppsats, KTH/Teknisk akustik

    Författare :Antoine Curien; [2022]
    Nyckelord :wheel vibrations; passive vibration control; multiple tuned mass damper; bending mode; numerical optimisation; damping; resonance; robustness; reduction methods; Hjulvibrationer; passiv vibrationsreglering; multi tuned mass damper; böjningsläge; numerisk optimering; dämpning; resonans; robusthet; modale reduktionsmetoder;

    Sammanfattning : The transition from internal combustion engine to battery electric cars is accompanied by a shift on the NVH issues damaging the passenger comfort. The rolling noise generated by the wheels and tyres is in particular characterized by an increasing attention from OEMs and car manufacturers. LÄS MER

  3. 2. Analytical and Numerical Study of a Passive Self-Tuning Resonator

    Master-uppsats, Lunds universitet/Mekanik

    Författare :Majeed al Tmizi; [2018]
    Nyckelord :Energy harvesting; mechanical vibrations; passive self-tuning; beam resonators; string resonators; sliding proof-mass; MEMS; actuators; Technology and Engineering;

    Sammanfattning : Energy harvesting, from ambient vibrations, can be a very effective method for solving the problem with powering electronics were the need for constant power or regular battery replacements is a trouble or an inconvenience. But, since all energy harvesters, using mechanical vibrations, need to operate in resonance in order to generate maximal electrical output, and ambient vibrations usually do not have a constant vibration frequency, this results in the need for efficient self-tuning systems. LÄS MER

  4. 3. Designing an Experiment to Investigate Slow Light Effects in Whispering Gallery Mode Resonators

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Karolina Dorozynska; [2015]
    Nyckelord :Slow light; Whispering Gallery Mode Resonator; WGMR; Atomic physics; Physics and Astronomy;

    Sammanfattning : Slow light and Whispering Gallery Mode Resonators are two interesting and useful fields with applications in optical sensing and laser stabilisation among others. Slow light can lead to long interaction times which are useful in light-matter interactions such as sensitive non-linear optics. LÄS MER

  5. 4. Novel micromechanical bulk acoustic wave resonator sensing concepts for advanced atomic force microscopy

    Master-uppsats, KTH/Mikro- och nanosystemteknik

    Författare :Stefan Wagner; [2012]
    Nyckelord :;

    Sammanfattning : This thesis investigates novel concepts of micromechanical bulk acoustic wave sensors for advanced atomic force microscopy (AFM), using micromachined silicon resonators, which are analyzed with regard to their performance as compared to conventional AFM sensors. Conventional AFM systems use a cantilever resonator for sensing the surface forces of the sample. LÄS MER

  7. 5. Single and double clamped resonator sensors - Design, fabrication and testing

    Magister-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Muhammad Islam; [2012]
    Nyckelord :;

    Sammanfattning : Micro- and nanomechanical single and double clamped resonators are widely being used as mass and temperature sensors due to their high sensitivity, as bio sensors due to their real time label-free detection ability. These resonators have attracted considerable interest from applications like point of care diagnostics, homeland security and environmental monitoring in recent years. LÄS MER