Sökning: "passive self-tuning"

Hittade 2 uppsatser innehållade orden passive self-tuning.

1. 1. 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

3. 2. Introduction of Adaptive Active Filters in HVDC Systems

   Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för reglerteknik

   Författare :Tor Göransson; [1993]
   Nyckelord :HVDC; Active fiters; Adaptive control; Parameter estimation; Technology and Engineering;

   Sammanfattning : When converting electric power from AC to DC, a 12-pulse converter is often used. Unfortunately, the converter creates harmonics superimposed on the DC voltage. These are removed by filters. A passive filter is normally used, but active filters may be added for improved performance. LÄS MER