Heymanns, Matthias (2015)
Multistable Structures for Broad Bandwidth Vibration-based
Energy Harvesters: An Analytical Design Investigation.
Technische Universität Darmstadt
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
The field of vibrational energy harvesting aims to transform ambient mechanical energy into electrical energy. For example, this energy can be used to operate autonomous sensor units for structural health monitoring or to supply low power electronic devices. Robust energy harvesters that allow to harvest sufficient energy over a broad frequency range are crucial for these applications. One strategy to increase the bandwidth of energy harvesters and, thus, the robustness is the exploitation of multistable structures. This is due to their feature of showing large amplitude oscillations that result from snap-through actions (inter-well oscillations) in a significant frequency range.
The aim of this thesis is to analyze different multistable energy harvester designs in order to optimize their performance and formulate design criteria. The considered designs are a bistable electromechanical beam, a bistable electromechanical composite plate and a newly proposed design of a multistable plate with four equilibria. Firstly, analytical models for the multistable energy harvesters are presented in order to assess their broad bandwidth harvesting capabilities. Analytical methods are applied to these models to investigate the underlying bifurcation behavior. Based on the analytical investigations, design criteria are formulated to describe the favorable harvesting domain. Numerical simulations are performed to supplement the analytical investigations. The differences of the considered structures are highlighted concerning robust and efficient harvesting by means of numerical simulations for different types of excitation. Experiments are carried out to complement the analytical and numerical analysis. The experiments establish the transferability of the numerical and analytical findings to real-world applications.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2015 | ||||
Autor(en): | Heymanns, Matthias | ||||
Art des Eintrags: | Erstveröffentlichung | ||||
Titel: | Multistable Structures for Broad Bandwidth Vibration-based Energy Harvesters: An Analytical Design Investigation | ||||
Sprache: | Englisch | ||||
Referenten: | Hagedorn, Prof. Peter ; Schweizer, Prof. Bernhard | ||||
Publikationsjahr: | 2015 | ||||
Ort: | Darmstadt | ||||
Verlag: | Studienbereich Mechanik, Technische Universität Darmstadt | ||||
Reihe: | Forschungsberichte des Instituts für Mechanik der Technischen Universität Darmstadt | ||||
Band einer Reihe: | 39 | ||||
Datum der mündlichen Prüfung: | 16 Dezember 2015 | ||||
URL / URN: | http://tuprints.ulb.tu-darmstadt.de/5333 | ||||
Kurzbeschreibung (Abstract): | The field of vibrational energy harvesting aims to transform ambient mechanical energy into electrical energy. For example, this energy can be used to operate autonomous sensor units for structural health monitoring or to supply low power electronic devices. Robust energy harvesters that allow to harvest sufficient energy over a broad frequency range are crucial for these applications. One strategy to increase the bandwidth of energy harvesters and, thus, the robustness is the exploitation of multistable structures. This is due to their feature of showing large amplitude oscillations that result from snap-through actions (inter-well oscillations) in a significant frequency range. The aim of this thesis is to analyze different multistable energy harvester designs in order to optimize their performance and formulate design criteria. The considered designs are a bistable electromechanical beam, a bistable electromechanical composite plate and a newly proposed design of a multistable plate with four equilibria. Firstly, analytical models for the multistable energy harvesters are presented in order to assess their broad bandwidth harvesting capabilities. Analytical methods are applied to these models to investigate the underlying bifurcation behavior. Based on the analytical investigations, design criteria are formulated to describe the favorable harvesting domain. Numerical simulations are performed to supplement the analytical investigations. The differences of the considered structures are highlighted concerning robust and efficient harvesting by means of numerical simulations for different types of excitation. Experiments are carried out to complement the analytical and numerical analysis. The experiments establish the transferability of the numerical and analytical findings to real-world applications. |
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Alternatives oder übersetztes Abstract: |
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Freie Schlagworte: | vibration-based energy harvesting; nonlinear energy harvesting; multistable structures | ||||
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URN: | urn:nbn:de:tuda-tuprints-53332 | ||||
Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau | ||||
Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Dynamik und Schwingungen |
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Hinterlegungsdatum: | 22 Mai 2016 19:55 | ||||
Letzte Änderung: | 29 Mai 2016 21:19 | ||||
PPN: | |||||
Referenten: | Hagedorn, Prof. Peter ; Schweizer, Prof. Bernhard | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 16 Dezember 2015 | ||||
Schlagworte: |
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