Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro

Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro

Failure to achieve satisfactory level for transient response of an aircraft in longitudinal motion - short period mode and phugoid modes - would mean poor flying and handling qualities leading to unnecessary pilot workload. This study proposes a stability augmentation system in longitudinal fly ing...

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Main Authors: Mohd Nasir, Rizal Effendy, Kuntjoro, Wahyu
Format: Article
Language:English
Published: Faculty of Mechanical Engineering (FKM) and UiTM Press 2013
Subjects:
Aircraft
Online Access:http://ir.uitm.edu.my/id/eprint/17579/
http://ir.uitm.edu.my/id/eprint/17579/2/AJ_RIZAL%20E.%20M.%20NASIR%20JME%2013.pdf
id uitm-17579
recordtype eprints
spelling uitm-175792019-09-10T03:10:41Z http://ir.uitm.edu.my/id/eprint/17579/ Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro Mohd Nasir, Rizal Effendy Kuntjoro, Wahyu Aircraft Failure to achieve satisfactory level for transient response of an aircraft in longitudinal motion - short period mode and phugoid modes - would mean poor flying and handling qualities leading to unnecessary pilot workload. This study proposes a stability augmentation system in longitudinal fly ing modes for steady and level flight at all airspeeds and altitudes within Baseline-II E-2 BWB s OFF. The main controlling component of this stability augmentation system is a set of canard. It must be able to compensate Baseline-II E-2 BWB poor transient responses 'damping ratios so that good flying quality can be achieved. Observation from the transient responses of the unaugmented system signify high-frequency short-period oscillations with almost constant low damping ratio at an altitude, and low-frequency phugoid oscillation with varying damping ratio depending on airspeed. A conclusive behaviour of natural frequencies and damping ratios against dynamic pressure leads to the understanding on how dynamic pressure influences the flying qualities. Derivation of dynamic equations in terms of dynamic pressures enables one to design and device a feedback system to compensate poor flying qualities of the original unaugmented aircraft with conclusive relationship between important parameters and dynamic pressure are put in the overall dynamic equation. Two feedback gain systems, pitch attitude and pitch rate gains are scheduled based on dynamic pressure values and are combined into the aircraft longitudinal SAS. The proposed SAS has proven to be the suitable candidate for Baseline-II E-2 BWB as it is able to ensure Level 1 flying qualities, longitudinally. Faculty of Mechanical Engineering (FKM) and UiTM Press 2013 Article PeerReviewed text en http://ir.uitm.edu.my/id/eprint/17579/2/AJ_RIZAL%20E.%20M.%20NASIR%20JME%2013.pdf Mohd Nasir, Rizal Effendy and Kuntjoro, Wahyu (2013) Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro. Journal of Mechanical Engineering, 10 (2). pp. 37-51. ISSN 1823-5514
repository_type Digital Repository
institution_category Local University
institution Universiti Teknologi MARA
building UiTM Institutional Repository
collection Online Access
language English
topic Aircraft
spellingShingle Aircraft
Mohd Nasir, Rizal Effendy
Kuntjoro, Wahyu
Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro
description Failure to achieve satisfactory level for transient response of an aircraft in longitudinal motion - short period mode and phugoid modes - would mean poor flying and handling qualities leading to unnecessary pilot workload. This study proposes a stability augmentation system in longitudinal fly ing modes for steady and level flight at all airspeeds and altitudes within Baseline-II E-2 BWB s OFF. The main controlling component of this stability augmentation system is a set of canard. It must be able to compensate Baseline-II E-2 BWB poor transient responses 'damping ratios so that good flying quality can be achieved. Observation from the transient responses of the unaugmented system signify high-frequency short-period oscillations with almost constant low damping ratio at an altitude, and low-frequency phugoid oscillation with varying damping ratio depending on airspeed. A conclusive behaviour of natural frequencies and damping ratios against dynamic pressure leads to the understanding on how dynamic pressure influences the flying qualities. Derivation of dynamic equations in terms of dynamic pressures enables one to design and device a feedback system to compensate poor flying qualities of the original unaugmented aircraft with conclusive relationship between important parameters and dynamic pressure are put in the overall dynamic equation. Two feedback gain systems, pitch attitude and pitch rate gains are scheduled based on dynamic pressure values and are combined into the aircraft longitudinal SAS. The proposed SAS has proven to be the suitable candidate for Baseline-II E-2 BWB as it is able to ensure Level 1 flying qualities, longitudinally.
format Article
author Mohd Nasir, Rizal Effendy
Kuntjoro, Wahyu
author_facet Mohd Nasir, Rizal Effendy
Kuntjoro, Wahyu
author_sort Mohd Nasir, Rizal Effendy
title Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro
title_short Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro
title_full Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro
title_fullStr Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro
title_full_unstemmed Stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / Rizal Effendy Mohd Nasir and Wahyu Kuntjoro
title_sort stability augmentation for longitudinal modes of a small blended wing-body aircraft with canard as control surface / rizal effendy mohd nasir and wahyu kuntjoro
publisher Faculty of Mechanical Engineering (FKM) and UiTM Press
publishDate 2013
url http://ir.uitm.edu.my/id/eprint/17579/
http://ir.uitm.edu.my/id/eprint/17579/2/AJ_RIZAL%20E.%20M.%20NASIR%20JME%2013.pdf
first_indexed 2023-09-18T22:58:36Z
last_indexed 2023-09-18T22:58:36Z
_version_ 1777418021902483456

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