Investigation Of The Effects Of Stiffness On Control Power Via A Morphing Wing Technology
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Investigation of the Effects of Stiffness on Control Power Via a Morphing Wing Technology
The development of lightweight, flexible wings to improve the performance of an aircraft has been a desire of aircraft engineers since the dawn of the aerospace industry. For many years, wings have been designed stiff to counteract flutter and to meet the need for high speeds. Ailerons and flaps are primarily used for controlling the maneuverability of an aircraft. However, the mechanical actuation systems for these devices contribute significant weight to the wings and thus limit the performance of an aircraft. To reduce weight and increase the maneuverability of an aircraft, a wing morphing technique is proposed in this paper. This technique assumes that the wing structure is flexible enough to allow the wing to twist or bend to control the maneuverability of an aircraft without using ailerons or flaps. However, flexible wings require energy to deform and flutter is still a very important issue that needs to be addressed for flexible wings. Hence, the relationship between the degree of flexibility to meet stated performance requirements and both the desire for minimum control energy and the requirement for flutter avoidance is explored in this research. The research was conducted to determine how wing structural stiffness affects the energy required to deform the wing and to give insight into its performance range for which flutter is to be avoided. The study incorporates structural and aerodynamic modeling, control-design optimization, and a candidate wing morphing technology. The results provide important information that designers of morphing wings can consult to explore the potential benefits of morphing wing technology.
Master's Theses Directories
"Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Morphing Wings Technologies
Author: Rosario Pecora
language: en
Publisher: Butterworth-Heinemann
Release Date: 2017-10-19
Morphing Wings Technologies: Large Commercial Aircraft and Civil Helicopters offers a fresh look at current research on morphing aircraft, including industry design, real manufactured prototypes and certification. This is an invaluable reference for students in the aeronautics and aerospace fields who need an introduction to the morphing discipline, as well as senior professionals seeking exposure to morphing potentialities. Practical applications of morphing devices are presented--from the challenge of conceptual design incorporating both structural and aerodynamic studies, to the most promising and potentially flyable solutions aimed at improving the performance of commercial aircraft and UAVs. Morphing aircraft are multi-role aircraft that change their external shape substantially to adapt to a changing mission environment during flight. The book consists of eight sections as well as an appendix which contains both updates on main systems evolution (skin, structure, actuator, sensor, and control systems) and a survey on the most significant achievements of integrated systems for large commercial aircraft. Provides current worldwide status of morphing technologies, the industrial development expectations, and what is already available in terms of flying systems Offers new perspectives on wing structure design and a new approach to general structural design Discusses hot topics such as multifunctional materials and auxetic materials Presents practical applications of morphing devices