Results 291 to 300 of about 3,578,244 (328)
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Parameter-robust flight control system for a flexible aircraft
Control Engineering Practice, 1994Abstract This paper discusses the design of a flight control system for a flexible aircraft, with significant coupling between flight mechanics and structural dynamics modes. Based on a longitudinal model, a normal acceleration control law is designed with a new synthesis technique, which is in fact a mixing of optimal control and eigenstructure ...
F. KUBICA +3 more
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A Collaborative MDO Approach for the Flexible Aircraft
54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2013An aero-structurally coupled MDO workflow for preliminary aircraft design is presented. Built on a multifidelity approach, it integrates analysis modules for conceptual aircraft design as well as physics-based methods for a more accurate and detailed aircraft synthesis. To account for aeroelastic effects already in the early design phases, the recently
Zill, Thomas +2 more
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Modal Filtering for Control of Flexible Aircraft
54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2013Modal regulators and deformation trackers are designed for an open-loop fluttering wing model. The regulators are designed with modal coordinate and accelerometer inputs respectively. The modal coordinates are estimated with simulated fiber optics.
Peter Suh, Dimitri Mavris
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Wireless and Flexible Ice Detection on Aircraft
SAE Technical Paper Series, 2015<div class="section abstract"><div class="htmlview paragraph">We present a wireless sensor system for temperature measurement and icing detection for the use on aircraft. The sensors are flexible (i.e. bendable), truly wireless, do not require scheduled maintenance, and can be attached easily to almost any point on the aircraft surface (e.g.
Thomas Schlegl +2 more
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Flight Dynamics of Highly Flexible Aircraft
Journal of Aircraft, 2008An analysis and parametric study of the flight dynamics of highly flexible aircraft are presented. The analysis extends previous work of the authors, used to predict the atypical flight dynamic characteristics of highly flexible flying wings, to conventional configurations with one or more fuselages, wings, and/or tails.
Chong-Seok Chang +2 more
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Flexible Combined Arrival–Departure Aircraft Scheduling
Journal of Aerospace Information SystemsEstablishing a well-planned schedule for departing and arriving aircraft is essential for satisfying the increasing demand for runway traffic, as well as ensuring the balance of runway capacity and demand. However, the existing optimal scheduling methods for departing and arriving aircraft may enhance use efficiency in the runway system for the ...
Chaoyu Xia +4 more
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Modeling for Control of Very Flexible Aircraft
AIAA Guidance, Navigation, and Control Conference, 2011The first investigations into the dynamics of a highly flexible aircraft came from the Daedalus Project, initiated in 1984. 3 The goal of this project was to push the limits of human powered flight while promoting engineering, science and education. Prior to the Daedalus Project the longest distance traveled by a human powered plane was 23 miles, a ...
Travis Gibson +2 more
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An Adaptive Controller for Very Flexible Aircraft
AIAA Guidance, Navigation, and Control (GNC) Conference, 2013Recently, a high-order linearized generic Very Flexible Aircraft (VFA) model that captures both flight dynamics and body elastic effects has been released to the public domain. To solve the control challenge for such state inaccessible plant, a new output-feedback adaptive controller for a general multiple-input-multipleoutput (MIMO) plant is developed
Zheng Qu +2 more
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Cruise altitude flexibility of jet transport aircraft
Aerospace Science and Technology, 2010This paper introduces concepts for the reduction of the cruise altitude of jet-powered transport aircraft. The design analysis is reduced to consideration of six parameters: profile drag, induced drag, structural weight, thrust-specific fuel consumption, gross wing area and relative wing thickness.
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Control of a flexible wing aircraft
2013Modern aircrafts are becoming lighter and more flexible to meet fuel efficiency, endurance and other requirements. The structural modes therefore occur at lower frequencies and there is an increased coupling between the structural and rigid body modes.
Graafmans, J.A.J. +2 more
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