Results 161 to 170 of about 2,332 (184)

Performance of minimum energy controllers on tiltrotor aircraft

Aircraft Engineering and Aerospace Technology, 2014
Purpose – The purpose of this article is to evaluate performance of minimum energy controllers thoroughly on a tiltrotor aircraft. Approach – Minimum energy controllers are designed for tiltrotor aircraft models for helicopter and airplane modes. Performance of minimum energy controllers is evaluated with respect to several criteria. Findings – Minimum
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Nonlinear Adaptive Control of Tiltrotor Aircraft Using Neural Networks

SAE Technical Paper Series, 1997
<div class="htmlview paragraph">Neural network augmented model inversion control is used to provide a civilian tilt-rotor aircraft with consistent response characteristics throughout its operating envelope, including conversion flight. The implemented response types are <i>Attitude Command Attitude Hold</i> in the longitudinal channel,
Rolf Rysdyk, Anthony J. Calise, Robert T. N. Chen   +2 more
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The VTOL TiltRotor Aircraft - Offshore Oil Support Capability

Offshore Technology Conference, 1982
ABSTRACT The Tilt Rotor is a VTOL concept which is being evaluated in the NASA/Army/Bell Tilt Rotor Research Aircraft Program. The concept is described and the test results of the XV-IS Program are presented in an analysis and discussion of the benefits of Tilt Rotor aircraft in offshore/remote area transportation ...
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Investigation of Structural Coupling Problems in Tiltrotor Aircraft

Proceedings of the Vertical Flight Society 75th Annual Forum, 2019
The paper investigates structural coupling problems in tiltrotor aircraft. A detailed tiltrotor model, representative of the Bell XV-15, has been built. The airframe model has been modified with a thinner wing to better reveal structural coupling proneness.
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AEROMECHANICS MODELLING OF TILTROTOR AIRCRAFT

2019
A numerical investigation into the effects of aerodynamic interaction modelling for tiltrotor aircraft is undertaken. The study compares a baseline case, with no interaction accounted for, with those that include the download on the wing and the rotor and wing wakes at the empennage against literature models.
Appleton, Wesley, Filippone, Antonino, Bojdo, Nicholas   +2 more
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Advanced Tiltrotor Technology VTOL Aircraft with a Single Rotor

AIAA's Aircraft Technology, Integration, and Operations (ATIO) 2002 Technical Forum, 2002
A new evolutionary aircraft design concept “third generation of airborne transportation” utilizing single Tiltrotor (Tilt Disc) technology and combining the Vertical Take Off and Landing (VTOL) capabilities of a helicopter with the horizontal speed and payload of a traditional jet airplane.
Siamak Yassini, George Syrovy
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Optimal Short Takeoff of Tiltrotor Aircraft in One Engine Failure

Journal of Aircraft, 2002
Optimal tiltrotor flight paths in the event of a single engine failure during short takeoff operations are investigated. A vertical plane rigid-body model is used that has as state variables aircraft position, body components of aircraft velocity, pitch angle and rate, and rotor angular speed.
Eric B. Carlson, Yiyuan J. Zhao
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A Study of Civil Tiltrotor Aircraft in NextGen Airspace

10th AIAA Aviation Technology, Integration, and Operations (ATIO) Conference, 2010
Tiltrotor aircraft have long been envisioned as being a potentially viable means of commercial aviation transport. Preliminary results from an ongoing study into the operational and technological considerations of Civil Tiltrotor (CTR) operation in the Next Generation airspace, circa the 2025 time-frame, are presented and discussed.
Larry Young, William Chung, Alfonso Paris, Dan Salvano, Ray Young, Huina Gao, Ken Wright, David Miller, Victor Cheng   +8 more
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Rubber a ‘Natural’ for V‐22 Osprey Tiltrotor Aircraft

Aircraft Engineering and Aerospace Technology, 1991
The ability to rise like a helicopter, tilt its rotors forward and fly like an airplane puts unusual demands on tiltrotor bearings, links and springs. Add to this stringent requirements for high reliability and low maintenance and you've got one tought assignment.
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Propeller–motor-coupled modeling and design for tiltrotor aircraft

Aircraft Engineering and Aerospace Technology
Purpose This study aims to propose a rapid optimization design framework for the electric propulsion system of tiltrotor aircraft with a comprehensive set of propeller and motor parameters. Design/methodology/approach To enhance the prediction accuracy, the authors have developed correction models for both the propeller and motor, i.e.
Jiechao Zhang, Siyu Zhang, Yao Zheng, Yaolong Liu   +3 more
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