Mechatronic modal hammer

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00329678" target="_blank" >RIV/68407700:21220/18:00329678 - isvavai.cz</a>

Výsledek na webu

<a href="http://mech.fs.cvut.cz" target="_blank" >http://mech.fs.cvut.cz</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mechatronic modal hammer

Popis výsledku v původním jazyce

Experimental modal analyses is well known and widely used tool for FEM model verification, calibration and recently quality assurance as well. The range of measured problems increased. Components with some level of non-linearity are measured. The quality control requires rapid measurement set-up. Accurate determination not only eigen-frequencies and eigen-modes, but also modal damping is essential. Source of excitation force is essential part of the measurement chain. Influence of the measurement set-up of the measured item have to be minimized. This disqualify modal shakers. They have to be connected (by screws or glue) to the item and it adds artificial damping and measurement uncertainty. Classical modal hammers do not influence properties of measured item. But their usage requires skilled worker, it is exhausting and impact force varies extremely between measurements. The paper introduces automatic modal hammer, which ensures high repeatability of impacts, clean impacts without double hits and controlled impact force level. Mechatronic design is based on flexible beam holding impact tool with force sensor, input shaping control of the hammer motion with on-line tuning and feedback control to suppress residual hammer vibrations.

Název v anglickém jazyce

Mechatronic modal hammer

Popis výsledku anglicky

Experimental modal analyses is well known and widely used tool for FEM model verification, calibration and recently quality assurance as well. The range of measured problems increased. Components with some level of non-linearity are measured. The quality control requires rapid measurement set-up. Accurate determination not only eigen-frequencies and eigen-modes, but also modal damping is essential. Source of excitation force is essential part of the measurement chain. Influence of the measurement set-up of the measured item have to be minimized. This disqualify modal shakers. They have to be connected (by screws or glue) to the item and it adds artificial damping and measurement uncertainty. Classical modal hammers do not influence properties of measured item. But their usage requires skilled worker, it is exhausting and impact force varies extremely between measurements. The paper introduces automatic modal hammer, which ensures high repeatability of impacts, clean impacts without double hits and controlled impact force level. Mechatronic design is based on flexible beam holding impact tool with force sensor, input shaping control of the hammer motion with on-line tuning and feedback control to suppress residual hammer vibrations.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

21100 - Other engineering and technologies

Projekt

<a href="/cs/project/LO1311" target="_blank" >LO1311: Rozvoj Centra vozidel udržitelné mobility</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů