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Yuan Wei, Renliang Chen, Ye Yuan and Luofeng Wang
This study assesses the influence of engine dynamic characteristics on helicopter handling quality during hover and low-speed forward flight. First, we construct the helicopter?engine coupling model (HECM) based on the power-matching relationship between...
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Lixin Wang, Chang Lu, Tao Jin, Hailiang Liu and Ting Yue
Using a nonlinear pilot-induced oscillation prediction method based on digital virtual flight simulation calculations, digital experiments on predicting lateral-directional nonlinear pilot-induced oscillations due to landing configuration switching of fl...
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Frédéric Moëns
A multidisciplinary design analysis and optimization process is developed at ONERA for the design of tube and wing and blended wing?body aircraft configurations. This process is composed of different disciplinary modules (geometry, propulsion, aerodynami...
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Johan Feldwisch and Martin Bauer
With the progress of high-performance computing, computationally expensive high-fidelity methods can be applied early in the design process of an aircraft. This enables Computational Fluid Dynamics (CFD) for the assesment of flight performance, handling ...
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Ye Yuan, Douglas Thomson and David Anderson
The tiltrotor has unique flight dynamics due to the aerodynamic interference characteristics. Multiple aerodynamics calculation approaches, such as the CFD method, are utilised to characterise this feature. The calculation process is usually time-consumi...
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Omkar Halbe and Manfred Hajek
This paper synthesizes a continuous, multivariable, finite-time-convergent, super-twisting attitude and rate controller for rotorcraft with the objective of providing desired handling qualities and robustness characteristics. A sliding manifold is define...
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Mohsen Rostami, Julian Bardin, Daniel Neufeld and Joon Chung
In considering aircraft design, it is very important to effectively size the tail configuration for stability and control. Multidisciplinary design optimization (MDO) focuses on the use of numerical optimization in the design of systems with multiple sub...
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Peyman Alizadeh, Tim Dumonceaux, Lope G. Tabil, Edmund Mupondwa, Majid Soleimani and Duncan Cree
The current study explores steam explosion pre-treatment of wood sawdust to develop high-quality biofuel pellets. In order to determine optimized conditions (temperature and residence time) for steam-treated biomass, seven test responses were chosen, inc...
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Luís M. B. C. Campos and Joaquim M. G. Marques
The coupling of the longitudinal and lateral stability modes of an aeroplane is considered in two cases: (i) weak coupling, when the changes in the frequency and damping of the phugoid, short period, dutch roll, and helical modes are small, i.e., the squ...
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Clayton Humphreys-Jennings, Ilias Lappas and Dragos Mihai Sovar
The Blended Wing Body (BWB) configuration is considered to have the potential of providing significant advantages when compared to conventional aircraft designs. At the same time, numerous studies have reported that technical challenges exist in many are...
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