Mechatronic modal hammer
The result's identifiers
Result code in 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>
Result on the web
<a href="http://mech.fs.cvut.cz" target="_blank" >http://mech.fs.cvut.cz</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Mechatronic modal hammer
Original language description
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.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
21100 - Other engineering and technologies
Result continuities
Project
<a href="/en/project/LO1311" target="_blank" >LO1311: Development of Vehicle Centre of Sustainable Mobility</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů