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Propeller control for takeoff of a heavily loaded coaxial compound helicopter
The Aeronautical Journal, Pages: 1 - 18
Swansea University Author:
Ye Yuan
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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...
Published in: | The Aeronautical Journal |
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ISSN: | 0001-9240 2059-6464 |
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Cambridge University Press (CUP)
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URI: | https://cronfa.swan.ac.uk/Record/cronfa63018 |
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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 |
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1767848685783220224 |
score |
11.017776 |