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Propeller control for takeoff of a heavily loaded coaxial compound helicopter

Y. Zhao Orcid Logo, Ye Yuan Orcid Logo, R. Chen Orcid Logo, X. Yan Orcid Logo

The Aeronautical Journal, Pages: 1 - 18

Swansea University Author: Ye Yuan Orcid Logo

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DOI (Published version): 10.1017/aer.2023.7

Abstract

Although a coaxial compound helicopter can takeoff without propeller in the normal condition, the distance should be as short as possible for obstacle avoidance when the vehicle operates in a confined area with heavy loads. Therefore, a suitable propeller control is required to improve the takeoff p...

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Published in: The Aeronautical Journal
ISSN: 0001-9240 2059-6464
Published: Cambridge University Press (CUP)
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URI: https://cronfa.swan.ac.uk/Record/cronfa63018
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first_indexed 2023-03-24T15:15:23Z
last_indexed 2023-04-04T03:26:04Z
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spelling v2 63018 2023-03-24 Propeller control for takeoff of a heavily loaded coaxial compound helicopter cdadbd9e334ad914d7968a538d9522a4 0000-0002-7568-0130 Ye Yuan Ye Yuan true false 2023-03-24 GENG Although a coaxial compound helicopter can takeoff without propeller in the normal condition, the distance should be as short as possible for obstacle avoidance when the vehicle operates in a confined area with heavy loads. Therefore, a suitable propeller control is required to improve the takeoff performance while the total power consumption is no more than the available power. The path is predicted by applying trajectory optimisation. Several varying takeoff parameters, including attitude, liftoff speed and obstacle height, are considered for optimum global performance. Three path indicators are proposed. Apart from typical distance and pilot workload, path sensitivity is quantified based on deviation from takeoff parameter variation. Results indicated that low propeller thrust at hover and moderate allocation on the propeller through flight is recommended. The aircraft achieves significantly improved takeoff performance compared to flight with pure rotors while maintaining the maximum takeoff weight. The distance is shortened by 12.6%, and the longitudinal pilot workload is alleviated by 9.8% and 7.3% from mean and maximum power frequency aspects. Besides, the path is less sensitive to takeoff parameter variations, such as speed, altitude and height. Journal Article The Aeronautical Journal 1 18 Cambridge University Press (CUP) 0001-9240 2059-6464 0 0 0 0001-01-01 10.1017/aer.2023.7 http://dx.doi.org/10.1017/aer.2023.7 COLLEGE NANME General Engineering COLLEGE CODE GENG Swansea University Not Required 2023-06-05T08:58:07.7977539 2023-03-24T15:13:41.1991529 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Y. Zhao 0000-0002-4179-6645 1 Ye Yuan 0000-0002-7568-0130 2 R. Chen 0000-0003-0317-704x 3 X. Yan 0000-0002-6852-5845 4 63018__26927__879fb94094864b6f988e1c743e8dd304.pdf propeller-control-for-takeoff-of-a-heavily-loaded-coaxial-compound-helicopter.pdf 2023-03-24T15:15:02.9699584 Output 2329364 application/pdf Accepted Manuscript true false 63018__27281__3b66f91eaabf4beba151d892285eec2b.pdf AeroJ-2022-0160_R2.pdf 2023-04-30T05:29:29.4392143 Output 7864124 application/pdf Accepted Manuscript true false
title Propeller control for takeoff of a heavily loaded coaxial compound helicopter
spellingShingle Propeller control for takeoff of a heavily loaded coaxial compound helicopter
Ye Yuan
title_short Propeller control for takeoff of a heavily loaded coaxial compound helicopter
title_full Propeller control for takeoff of a heavily loaded coaxial compound helicopter
title_fullStr Propeller control for takeoff of a heavily loaded coaxial compound helicopter
title_full_unstemmed Propeller control for takeoff of a heavily loaded coaxial compound helicopter
title_sort Propeller control for takeoff of a heavily loaded coaxial compound helicopter
author_id_str_mv cdadbd9e334ad914d7968a538d9522a4
author_id_fullname_str_mv cdadbd9e334ad914d7968a538d9522a4_***_Ye Yuan
author Ye Yuan
author2 Y. Zhao
Ye Yuan
R. Chen
X. Yan
format Journal article
container_title The Aeronautical Journal
container_start_page 1
institution Swansea University
issn 0001-9240
2059-6464
doi_str_mv 10.1017/aer.2023.7
publisher Cambridge University Press (CUP)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
url http://dx.doi.org/10.1017/aer.2023.7
document_store_str 1
active_str 0
description Although a coaxial compound helicopter can takeoff without propeller in the normal condition, the distance should be as short as possible for obstacle avoidance when the vehicle operates in a confined area with heavy loads. Therefore, a suitable propeller control is required to improve the takeoff performance while the total power consumption is no more than the available power. The path is predicted by applying trajectory optimisation. Several varying takeoff parameters, including attitude, liftoff speed and obstacle height, are considered for optimum global performance. Three path indicators are proposed. Apart from typical distance and pilot workload, path sensitivity is quantified based on deviation from takeoff parameter variation. Results indicated that low propeller thrust at hover and moderate allocation on the propeller through flight is recommended. The aircraft achieves significantly improved takeoff performance compared to flight with pure rotors while maintaining the maximum takeoff weight. The distance is shortened by 12.6%, and the longitudinal pilot workload is alleviated by 9.8% and 7.3% from mean and maximum power frequency aspects. Besides, the path is less sensitive to takeoff parameter variations, such as speed, altitude and height.
published_date 0001-01-01T08:58:06Z
_version_ 1767848685783220224
score 11.017754

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