Feedback

Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
VIEW 20 | DOWNLOAD 1

Master thesis and internship[BR]- Master's Thesis : Multi Modal Vibration Absorber based on Hybrid Electromagnetic Shunt Damper[BR]- Stage d'insertion professionnelle

Download
Hernandez Aguirre, Leiza ULiège
Promotor(s) : Collette, Christophe ULiège
Date of defense : 7-Sep-2020/9-Sep-2020 • Permalink : http://hdl.handle.net/2268.2/10059
Details
Title : Master thesis and internship[BR]- Master's Thesis : Multi Modal Vibration Absorber based on Hybrid Electromagnetic Shunt Damper[BR]- Stage d'insertion professionnelle
Author : Hernandez Aguirre, Leiza ULiège
Date of defense  : 7-Sep-2020/9-Sep-2020
Advisor(s) : Collette, Christophe ULiège
Committee's member(s) : Kerschen, Gaëtan ULiège
Bruls, Olivier ULiège
Language : English
Number of pages : 63
Discipline(s) : Engineering, computing & technology > Aerospace & aeronautics engineering
Institution(s) : Université de Liège, Liège, Belgique
Degree: Cours supplémentaires destinés aux étudiants d'échange (Erasmus, ...)
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] Electromagnetic transducers have been widely employed as vibration absorbers in numerous control applications. Their purpose lies in dissipating the unwanted vibrations that may arise in any resonant structure, using those electromagnetic transducers as the actuators of the control strategies. Such strategies can be active, using an integration of the actuator with a sensor and control unit, or passive, employing electrical networks to the actuator that respond to the movement of the structure. Although the active techniques usually outperform the passive control systems in terms of the closed-loop damping and robustness to resonance uncertainty, they require external power for the operation. This project proposes a hybrid control system capable of dissipating multiple resonant modes by combining a passive shunt circuit and the use of an external current source. The optimization of the passive components used in the hybrid system is based on the method of maximum damping, consisting of minimizing the settling time of the response subjected to the action of an external disturbance. The control law proposed for the active current source ensures the stability of the system by using the absolute velocity of the first mass of the structure as a feedback to the designed controller. The employment of hybrid control systems enhances the robustness and control performance of passive systems while reduces considerably the power consumption of purely active systems and provides a fail-safe behavior. The efficacy of this strategy has been experimentally validated through the vibrational control of a flexible cantilever beam.


File(s)

Document(s)

File
Access Résumé.pdf
Description: Summary
Size: 36.32 kB
Format: Adobe PDF
File
Access MasterThesis_LeizaHernandez_FinalVersion.pdf
Description:
Size: 19.81 MB
Format: Adobe PDF
File
Access MasterThesis_LeizaHernandez_FinalVersion(1st page updeted).pdf
Description: The 1st page of the thesis has been updated according to your requirements.
Size: 19.81 MB
Format: Adobe PDF

Author

  • Hernandez Aguirre, Leiza ULiège Université de Liège > conv. Erasmus en sc. appl.

Promotor(s)

Committee's member(s)

  • Kerschen, Gaëtan ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
    ORBi View his publications on ORBi
  • Bruls, Olivier ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques
    ORBi View his publications on ORBi
  • Total number of views 20
  • Total number of downloads 1










All documents available on MatheO are protected by copyright and subject to the usual rules for fair use.
The University of Liège does not guarantee the scientific quality of these students' works or the accuracy of all the information they contain.