eprintid: 10188575
rev_number: 8
eprint_status: archive
userid: 699
dir: disk0/10/18/85/75
datestamp: 2024-04-26 10:28:58
lastmod: 2024-04-26 10:28:58
status_changed: 2024-04-26 10:28:58
type: thesis
metadata_visibility: show
sword_depositor: 699
creators_name: Park, Moonsoo
title: Integrated system modelling approach for developing mini flapping wing aerial vehicles
ispublished: unpub
divisions: UCL
divisions: B04
divisions: C05
divisions: F45
note: Copyright © The Author 2024. Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) Licence (https://creativecommons.org/licenses/by-nc/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request.
abstract: This thesis studies the mathematical modelling for motor-actuated and piezoelectric beam-type actuator-driven mini-flapping wing aerial vehicles (MFAV). The investigated systems are composed of three essential components: the actuator, transmission, and wings. By integrating the characteristic equations governing these parts, the mechanical responses of the systems are thoroughly examined. MATLAB and Simulink are employed to conduct simulations, enabling in-depth exploration of the energy flow within the electromechanical system and their optimisations under realistic loads.
The developed electromechanical models for motor-actuated MFAVs effectively capture the system's behaviour by considering the commercial DC gear motor and the flapping mechanism. The system's losses are modelled using the Coulomb friction model, enabling prediction of the system's energetic requirements which is not possible otherwise. The model also allows examination of the impact of adding elastic storage elements to the system. Optimal crank and connecting rod lengths are identified through trend analysis, and the system's performance under varying operational conditions is evaluated. A comparison between slider-crank and direct drive systems offers valuable insights into their respective advantages and drawbacks, revealing the direct drive model's superior performance in terms of average lift and system efficiency.
A mathematical model for piezoelectric bimorph actuators is established and its effectiveness is confirmed using Ansys. The model serves as the basis for developing a comprehensive mathematical model for piezoelectric bimorph-actuated MFAV. The model includes the wing morphology and aerodynamic effects encompassing translation, added mass effect, and rotation around the leading edge axis. Lastly, optimisation is performed, and the maximum stress in the piezoelectric actuator is examined to ensure structural integrity. The analysis focuses on the net lift, and stroke and pitch angles of the wing. The optimised system’s performance is assessed under different voltages. Additionally, the influence of aerodynamic coefficients and the flexural hinge on the piezoelectric bimorph-actuated flapping wing system is established.
date: 2024-03-28
date_type: published
oa_status: green
full_text_type: other
thesis_class: doctoral_open
thesis_award: Ph.D
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2254564
lyricists_name: Park, Moonsoo
lyricists_id: MPARK95
actors_name: Park, Moonsoo
actors_name: Dewerpe, Marie
actors_id: MPARK95
actors_id: MDDEW97
actors_role: owner
actors_role: impersonator
full_text_status: public
pages: 279
institution: UCL (University College London)
department: Mechanical Engineering
thesis_type: Doctoral
citation:        Park, Moonsoo;      (2024)    Integrated system modelling approach for developing mini flapping wing aerial vehicles.                   Doctoral thesis  (Ph.D), UCL (University College London).     Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10188575/1/Park_Thesis.pdf