Enhancements Of Tow Steering Design Techniques
DOWNLOAD
Download Enhancements Of Tow Steering Design Techniques PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Enhancements Of Tow Steering Design Techniques book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Enhancements Of Tow Steering Design Techniques
DOWNLOAD
Author : Brian F. Tatting
language : en
Publisher:
Release Date : 2005
Enhancements Of Tow Steering Design Techniques written by Brian F. Tatting and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Enhancements Of Tow Steering Design Techniques
DOWNLOAD
Author : Brian F. Tatting
language : en
Publisher: BiblioGov
Release Date : 2013-07
Enhancements Of Tow Steering Design Techniques written by Brian F. Tatting and has been published by BiblioGov this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-07 with categories.
An extension to existing design tools that utilize tow-steering is presented which is used to investigate the use of elastic tailoring for a flat panel with a central hole under combined loads of compression and shear. The elastic tailoring is characterized by tow-steering within individual lamina as well as a novel approach based on selective reinforcement, which attempts to minimize compliance through the use of Cellular Automata design concepts. The selective reinforcement designs lack any consideration of manufacturing constraints, so a new tow-steered path definition was developed to translate the prototype selective reinforcement designs into manufacturable plies. The minimum weight design of a flat panel under combined loading was based on a model provided by NASA-Langley personnel and analyzed by STAGS within the OLGA design environment. Baseline designs using traditional straight fiber plies were generated, as well as tow-steered designs which incorporated parallel, tow-drop, and overlap plies within the laminate. These results indicated that the overlap method provided the best improvement with regards to weight and performance as compared to traditional constant stiffness monocoque panels, though the laminates did not measure up to similar designs from the literature using sandwich and isogrid constructions. Further design studies were conducted using various numbers of the selective reinforcement plies at the core and outer surface of the laminate. None of these configurations exhibited notable advantages with regard to weight or buckling performance. This was due to the fact that the minimization of the compliance tended to direct the major stresses toward the center of the panel, which decreased the ability of the structure to withstand loads leading to instability.
Enhancements Of Tow Steering Design Techniques
DOWNLOAD
Author : National Aeronaut Administration (Nasa)
language : en
Publisher:
Release Date : 2020-08-05
Enhancements Of Tow Steering Design Techniques written by National Aeronaut Administration (Nasa) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-08-05 with categories.
An extension to existing design tools that utilize tow-steering is presented which is used to investigate the use of elastic tailoring for a flat panel with a central hole under combined loads of compression and shear. The elastic tailoring is characterized by tow-steering within individual lamina as well as a novel approach based on selective reinforcement, which attempts to minimize compliance through the use of Cellular Automata design concepts. The selective reinforcement designs lack any consideration of manufacturing constraints, so a new tow-steered path definition was developed to translate the prototype selective reinforcement designs into manufacturable plies. The minimum weight design of a flat panel under combined loading was based on a model provided by NASA-Langley personnel and analyzed by STAGS within the OLGA design environment. Baseline designs using traditional straight fiber plies were generated, as well as tow-steered designs which incorporated parallel, tow-drop, and overlap plies within the laminate. These results indicated that the overlap method provided the best improvement with regards to weight and performance as compared to traditional constant stiffness monocoque panels, though the laminates did not measure up to similar designs from the literature using sandwich and isogrid constructions. Further design studies were conducted using various numbers of the selective reinforcement plies at the core and outer surface of the laminate. None of these configurations exhibited notable advantages with regard to weight or buckling performance. This was due to the fact that the minimization of the compliance tended to direct the major stresses toward the center of the panel, which decreased the ability of the structure to withstand loads leading to instability. Tatting, Brian F. and Setoodeh, Shahriar and Gurdal, Zafer Langley Research Center NASA/CR-2005-213911 NAS1-00135; WBS 23-064-30-34 LOADS (FORCES); RECTANGULAR PANELS; STEERING; MANUFACTURING; CELLULAR AUTOMATA; STIFFNESS; STABILITY; LAMINATES; DISPLACEMENT; FINITE ELEMENT METHOD; ALGORITHMS; AUTOMATA THEORY
Enhancements Of Tow Steering Design Techniques
DOWNLOAD
Author : Brian F. Tatting
language : en
Publisher:
Release Date : 2005
Enhancements Of Tow Steering Design Techniques written by Brian F. Tatting and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Design And Manufacture Of Elastically Tailored Tow Placed Plates
DOWNLOAD
Author :
language : en
Publisher: DIANE Publishing
Release Date :
Design And Manufacture Of Elastically Tailored Tow Placed Plates written by and has been published by DIANE Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Design And Validation Of High Speed Active Trailer Steering System For Articulated Heavy Vehicle
DOWNLOAD
Author : Zhituo Ni
language : en
Publisher:
Release Date : 2016
Design And Validation Of High Speed Active Trailer Steering System For Articulated Heavy Vehicle written by Zhituo Ni and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Articulated heavy duty vehicles are widely used around the world for its economic and environmental benefits. A-train double is one of the most popular heavy duty vehicles in Canada. Despite its advantages, the spread of A-train is hampered by poor lateral dynamic performance and poor accident avoid ability in highway resulted from its special structure. In order to evaluate the lateral dynamic performance of the A-train double at highway speed, ISO standards have proposed the rearward amplification (RA) measures to characterizing the performance. It has been reported that the RA curves obtained through three different methods proposed by ISO-14791 differ. This thesis studies three proposed methods in detail and analyzes the contributing causes for the inconsistency among three test maneuvers based on A-train double. In order to increase the lateral stability of the A-train double, Active steering systems (ATS) have been designed through two methods: robust LQR-LMI method with genetic algorithm (GA) optimization and H∞ method. The designed controllers are validated by numerical simulation and hardware in-loop simulation. The ATS designed from two methods show good robust stability and improve the lateral dynamic performance of A-train double dramatically at highway speed.
Optimization Of Aircraft Tow Steered Composite Wing Structures
DOWNLOAD
Author : Michael Chamberlain Henson
language : en
Publisher:
Release Date : 2017
Optimization Of Aircraft Tow Steered Composite Wing Structures written by Michael Chamberlain Henson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Airplanes categories.
An efficient methodology for design of aircraft composite wing structures is presented. The developed approach provides a flexible and integrated strategy to leverage advantages of composite material tow steering to achieve more effective wing designs. This is accomplished by including the coupling between OML geometry, aerodynamics and structural response. Structural and aerodynamic analyses are derived from parametric aircraft geometry and assembled into a framework for aero-structural wing sizing. A Ritz equivalent plate solution is extended to model composite materials with variable fiber path geometry. The structural modeling approach is implemented to automate creation of both Ritz and finite element analyses. The Ritz structural model is coupled to a vortex lattice flow solver and implemented into an optimization framework. By using this approach we are more rapidly able to gain an understanding of optimal wing skin laminates that satisfy a variety of constrains and objective functions. The framework is suitable for conceptual and preliminary design of aircraft wing skins and it has been applied to accomplish a tow-steered wing skin design.
Process Induced Defects During Tow Steering In Automated Fiber Placement
DOWNLOAD
Author : Nima Bakhshi
language : en
Publisher:
Release Date : 2019
Process Induced Defects During Tow Steering In Automated Fiber Placement written by Nima Bakhshi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Various advantages offered by Automated Fiber Placement (AFP) have led to its increasing application in the aerospace industry to manufacture high-quality, large structural parts. Application of this technology, however, is considerably restrained by the defects that appear in the layup particularly during tow steering. An extensive experimental investigation using various process parameters and steering radii is performed to gain a deeper understanding of defect formation processes during steering of thermosetting prepreg tows. Five predominant defect types, namely in-plane fiber waviness, sheared fibers, tow pull up (bridging), blisters and out-of-plane wrinkles that occur during the steering are identified. The defects formation mechanisms are explained and discussed. Furthermore, a more detailed set of experiments is performed to capture the viscoelastic growth of individual wrinkles with time. A novel finite element modeling framework for simulating the prepreg deposition process is presented in the commercial finite element software, Abaqus. It is demonstrated that by prescribing the global behavior of prepreg tow during the process and representing prepreg tack with an appropriate cohesive zone model, this approach is capable of capturing wrinkles and blisters that are caused by tow steering. Moreover, the conventional local approaches for modeling defects are extended by utilizing a viscoelastic interface to develop a theoretical model which is capable of demonstrating the time-dependent growth of wrinkles. The interaction between prepreg and compaction roller is known to be influential on the quality of the deposited tow. Five compaction rollers with different materials, stiffness, and architecture are built. In a series of experiments the effect of each roller on the appearance of defects, particularly on blisters is investigated. The optimum roller design based on the experimental observations was identified.
Techniques For Optimal Crop Selection In A Controlled Ecological Life Support System
DOWNLOAD
Author : Ann McCormack
language : en
Publisher:
Release Date : 1992
Techniques For Optimal Crop Selection In A Controlled Ecological Life Support System written by Ann McCormack and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Advanced Vehicle Control
DOWNLOAD
Author : Johannes Edelmann
language : en
Publisher: CRC Press
Release Date : 2016-12-19
Advanced Vehicle Control written by Johannes Edelmann and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-19 with Technology & Engineering categories.
The AVEC symposium is a leading international conference in the fields of vehicle dynamics and advanced vehicle control, bringing together scientists and engineers from academia and automotive industry. The first symposium was held in 1992 in Yokohama, Japan. Since then, biennial AVEC symposia have been established internationally and have considerably contributed to the progress of technology in automotive research and development. In 2016 the 13th International Symposium on Advanced Vehicle Control (AVEC’16) was held in Munich, Germany, from 13th to 16th of September 2016. The symposium was hosted by the Munich University of Applied Sciences. AVEC’16 puts a special focus on automatic driving, autonomous driving functions and driver assist systems, integrated control of interacting control systems, controlled suspension systems, active wheel torque distribution, and vehicle state and parameter estimation. 132 papers were presented at the symposium and are published in these proceedings as full paper contributions. The papers review the latest research developments and practical applications in highly relevant areas of vehicle control, and may serve as a reference for researchers and engineers.