Multi-resolution Trajectory Optimization of eVTOL Aircraft Using Capacity Collocation

Mingkai Wang, Shuguang Zhang, Florian Holzapfel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Electric vertical takeoff and landing (eVTOL) aircraft has advantages of cleaner, quieter, and more comfortable flight over its conventional counterpart, but suffers from lower endurance due to the limit of current battery technology. Efficient trajectory planning is thus required to extend the application scenarios. Hence, this paper proposes a “capacity collocation” scheme to improve the efficiency of trajectory optimization. First, the system dynamics is reformulated on the capacity domain, which transforms time-derivatives to capacity-derivatives. The reformulation yields a reduced-order optimal control problem solved by a multi-resolution direct collocation method. The non-uniform discretization grid nodes are selected according to a density function based on the discharging curve of lithium-ion batteries. The efficacy of the proposed method is verified by comparison with the collocation method, which demonstrates that the proposed method is advantageous in terms of accuracy and efficiency.

Original languageEnglish
Title of host publicationAdvances in Guidance, Navigation and Control - Proceedings of 2022 International Conference on Guidance, Navigation and Control
EditorsLiang Yan, Haibin Duan, Yimin Deng, Liang Yan
PublisherSpringer Science and Business Media Deutschland GmbH
Pages739-749
Number of pages11
ISBN (Print)9789811966125
DOIs
StatePublished - 2023
EventInternational Conference on Guidance, Navigation and Control, ICGNC 2022 - Harbin, China
Duration: 5 Aug 20227 Aug 2022

Publication series

NameLecture Notes in Electrical Engineering
Volume845 LNEE
ISSN (Print)1876-1100
ISSN (Electronic)1876-1119

Conference

ConferenceInternational Conference on Guidance, Navigation and Control, ICGNC 2022
Country/TerritoryChina
CityHarbin
Period5/08/227/08/22

Keywords

  • Battery
  • Electric aircraft
  • Mesh refinement
  • Trajectory optimization
  • VTOL

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