Gust Loads on Aircraft
Author : Frederic M. Hoblit
Publisher : AIAA
Page : 332 pages
File Size : 35,40 MB
Release : 1988
Category : Airplanes
ISBN : 9781600860607
Gust Alleviation Using Direct Gust Measurement
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 96 pages
File Size : 30,50 MB
Release : 2018-06
Category :
ISBN : 9781720568759
Book Description
The increasing competition in the market of civil aircraft leads to operating efficiency and passenger comfort being very important sales arguments. Continuous developments in jet propulsion technology helped to reduce energy consumption, as well as noise and vibrations due to the engines. The main problem with respect to ride comfort is, however, the transmittance of accelerations and jerkiness imposed by atmospheric turbulence from the wings to the fuselage. This 'gust' is also a design constraint: Light airplane structures help to save, energy, but are more critical to resist the loads imposed by turbulence. For both reasons, efficient gust alleviation is necessary to improve the performance of modern aircraft. Gust can be seen as a change in the angle of attack or as an additional varying vertical component of the headwind. The effect of gust can be very strong, since the same aerodynamic forces that keep the airplane flying are involved. Event though the frequency range of those changes is quite low, it is impossible for the pilot to alleviate gust manually. Besides, most of the time during the flight, the, autopilot maintains course and the attitude of flight. Certainly, most autopilots should be capable of damping the roughest parts of turbulence, but they are unable to provide satisfactory results in that field. A promising extension should be the application of subsidiary, control, where the inner (faster) control loop alleviates turbulence and the outer (slower) loop controls the attitude of flight. Besides the mentioned ride comfort, another reason for gust alleviation with respect to the fuselage is the sensibility of electrical devices to vibration and high values of acceleration. Many modern airplane designs--especially inherently instable military aircraft--are highly dependent on avionics. The lifetime and the reliability of these systems is thus essential.Hoppe, Sven MarcoAmes Research Center; Armstrong Flight Research Center; Marshall Space Flight
Active Spanwise Lift Control
Author : Joaquim Neto Dias
Publisher : American Institute of Aeronautics and Astronautics Incorporated
Page : 0 pages
File Size : 33,92 MB
Release : 2020
Category : Airplanes
ISBN : 9781624105999
Book Description
Presents a novel approach to tackle the gust alleviation problem. The authors address the spanwise behaviour of aerodynamic loads, as this is what should be primarily controlled. Because the gust loads are mainly caused by disturbances in the spanwise lift, the aim is at controlling the shape of the lift distribution profile along the span.
Design for Active and Passive Flutter Suppression and Gust Alleviation
Author : Mordechay Karpel
Publisher :
Page : 126 pages
File Size : 48,13 MB
Release : 1981
Category : Aeroelasticity
ISBN :
Book Description
Advanced Model Predictive Control
Author : Tao Zheng
Publisher : BoD – Books on Demand
Page : 434 pages
File Size : 42,80 MB
Release : 2011-07-05
Category : Technology & Engineering
ISBN : 9533072989
Book Description
Model Predictive Control (MPC) refers to a class of control algorithms in which a dynamic process model is used to predict and optimize process performance. From lower request of modeling accuracy and robustness to complicated process plants, MPC has been widely accepted in many practical fields. As the guide for researchers and engineers all over the world concerned with the latest developments of MPC, the purpose of "Advanced Model Predictive Control" is to show the readers the recent achievements in this area. The first part of this exciting book will help you comprehend the frontiers in theoretical research of MPC, such as Fast MPC, Nonlinear MPC, Distributed MPC, Multi-Dimensional MPC and Fuzzy-Neural MPC. In the second part, several excellent applications of MPC in modern industry are proposed and efficient commercial software for MPC is introduced. Because of its special industrial origin, we believe that MPC will remain energetic in the future.
A Flight Investigation of an Automatic Gust-alleviation System in a Transport Airplane
Author : Paul A. Hunter
Publisher :
Page : 96 pages
File Size : 33,57 MB
Release : 1961
Category : Elevators (Airplanes)
ISBN :
Book Description
General Aviation Aircraft Design
Author : Snorri Gudmundsson
Publisher : Butterworth-Heinemann
Page : 1058 pages
File Size : 43,40 MB
Release : 2013-09-03
Category : Technology & Engineering
ISBN : 0123973295
Book Description
Find the right answer the first time with this useful handbook of preliminary aircraft design. Written by an engineer with close to 20 years of design experience, General Aviation Aircraft Design: Applied Methods and Procedures provides the practicing engineer with a versatile handbook that serves as the first source for finding answers to realistic aircraft design questions. The book is structured in an "equation/derivation/solved example" format for easy access to content. Readers will find it a valuable guide to topics such as sizing of horizontal and vertical tails to minimize drag, sizing of lifting surfaces to ensure proper dynamic stability, numerical performance methods, and common faults and fixes in aircraft design. In most cases, numerical examples involve actual aircraft specs. Concepts are visually depicted by a number of useful black-and-white figures, photos, and graphs (with full-color images included in the eBook only). Broad and deep in coverage, it is intended for practicing engineers, aerospace engineering students, mathematically astute amateur aircraft designers, and anyone interested in aircraft design. - Organized by articles and structured in an "equation/derivation/solved example" format for easy access to the content you need - Numerical examples involve actual aircraft specs - Contains high-interest topics not found in other texts, including sizing of horizontal and vertical tails to minimize drag, sizing of lifting surfaces to ensure proper dynamic stability, numerical performance methods, and common faults and fixes in aircraft design - Provides a unique safety-oriented design checklist based on industry experience - Discusses advantages and disadvantages of using computational tools during the design process - Features detailed summaries of design options detailing the pros and cons of each aerodynamic solution - Includes three case studies showing applications to business jets, general aviation aircraft, and UAVs - Numerous high-quality graphics clearly illustrate the book's concepts (note: images are full-color in eBook only)
Technical Note
Author :
Publisher :
Page : 396 pages
File Size : 23,18 MB
Release : 1956
Category : Aeronautics
ISBN :
Book Description
Technical Note - National Advisory Committee for Aeronautics
Author : United States. National Advisory Committee for Aeronautics
Publisher :
Page : 890 pages
File Size : 47,60 MB
Release : 1956
Category : Aeronautics
ISBN :
Book Description
Parameter Estimation and Inverse Problems
Author : Richard C. Aster
Publisher : Elsevier
Page : 406 pages
File Size : 38,9 MB
Release : 2018-10-16
Category : Science
ISBN : 0128134232
Book Description
Parameter Estimation and Inverse Problems, Third Edition, is structured around a course at New Mexico Tech and is designed to be accessible to typical graduate students in the physical sciences who do not have an extensive mathematical background. The book is complemented by a companion website that includes MATLAB codes that correspond to examples that are illustrated with simple, easy to follow problems that illuminate the details of particular numerical methods. Updates to the new edition include more discussions of Laplacian smoothing, an expansion of basis function exercises, the addition of stochastic descent, an improved presentation of Fourier methods and exercises, and more. - Features examples that are illustrated with simple, easy to follow problems that illuminate the details of a particular numerical method - Includes an online instructor's guide that helps professors teach and customize exercises and select homework problems - Covers updated information on adjoint methods that are presented in an accessible manner
