Download or read book Modeling and Simulation of Coaxial Helicopter Rotor Aerodynamics written by Murat Gecgel and published by . This book was released on 2009 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Helicopter and Tiltrotor Flight Simulation written by Mark E. Dreier and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presemts the tools required to write a flight simulation mathematical model in one comprehensive reference. Chapters on the aerodynamics and dynamics of fuselages, wings, propellers, rotors, landing gear, engines, drive trains, controls, and aerodynamic interference precede the chapters on organisation, information flow, and trimming methods.
Download or read book Helicopter Flight Dynamics written by G. D. Padfield and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1996 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive treatment of the theoretical background to the dynamics of helicopter flight, the development of handling criteria, and new flight-test techniques. Flying quality is described from both objective and subjective perspectives, and test results are presented from a variety of different sources.
Download or read book Introduction to Helicopter and Tiltrotor Simulation written by Mark E. Dreier and published by AIAA Education. This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: While many available texts cover some aspect of simulation, this book is unique in that it brings all the tools required to write a flight simulation mathematical model together in one reference. A perfect reference guide, the book follows a logical build-up to a complete aircraft model. It begins with a discussion of the types of flight simulation that are possible. From there, chapters are dedicated to vectors, vector resolution, and the many axis systems used in helicopter analysis. A brief chapter on atmospheric modeling precedes a critical section devoted to the importance of establishing the distinction between inertial velocity, wash velocity, and aerodynamic velocity. After these chapters have built the foundation for aerodynamics and dynamics, the rotorcraft is modeled from simple components up to more complex systems with chapters dedicated to fuselage, wings, propellers, rotors, engines, drive systems, landing gear, controls, and aerodynamic coupling. The final chapters describe overall organization and informational flow, and methods to trim the aircraft to initial states.
Download or read book Helicopter Flight Dynamics written by Gareth D. Padfield, CEng, PhD, FRAeS and published by Wiley-Blackwell. This book was released on 2008-04-15 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behaviour of helicopters is so complex that understanding the physical mechanisms at work in trim, stability and response, and thus the prediction of Flying Qualities, requires a framework of analytical and numerical modelling and simulation. Good Flying Qualities are vital for ensuring that mission performance is achievable with safety and, in the first edition of Helicopter Flight Dynamics, a comprehensive treatment of design criteria was presented. In this second edition, the author complements this with a new Chapter on Degraded Flying Qualities, drawing examples from flight in poor visibility, failure of control functions and encounters with severe atmospheric disturbances. Fully embracing the consequences of Degraded Flying Qualities during the design phase will contribute positively to safety. The accurate prediction and assessment of Flying Qualities draws on the modelling and simulation discipline on the one hand and testing methodologies on the other. Checking predictions in flight requires clearly defined ‘mission-task-elements’, derived from missions with realistic performance requirements. High fidelity simulations also form the basis for the design of stability and control augmentation systems, essential for conferring Level 1 Flying Qualities. The integrated description of flight dynamic modelling, simulation and flying qualities forms the subject of this book, which will be of interest to engineers in research laboratories and manufacturing industry, test pilots and flight test engineers, and as a reference for graduate and postgraduate students in aerospace engineering. The Author Gareth Padfield, a Fellow of the Royal Aeronautical Society, is the Bibby Professor of Aerospace Engineering at the University of Liverpool. He is an aeronautical engineer by training and has spent his career to date researching the theory and practice of flight for both fixed-wing aeroplanes and rotorcraft. During his years with the UK’s Royal Aircraft Establishment and Defence Evaluation and Research Agency, he conducted research into rotorcraft dynamics, handling qualities and flight control. His work has involved a mix of flight testing, creating and testing simulation models and developing analytic approximations to describe flight behaviour and handling qualities. Much of his research has been conducted in the context of international collaboration – with the Technical Co-operation Programme, AGARD and GARTEUR as well as more informal collaborations with industry, universities and research centres worldwide. He is very aware that many accomplishments, including this book, could not have been achieved without the global networking that aerospace research affords. During the last 8 years as an academic, the author has continued to develop his knowledge and understanding in flight dynamics, not only through research, but also through teaching the subject at undergraduate level; an experience that affords a new and deeper kind of learning that, hopefully, readers of this book will benefit from.
Download or read book Principles of Helicopter Aerodynamics written by J. Gordon Leishman and published by Cambridge University Press. This book was released on 2002-12-23 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopters are highly capable and useful rotating-wing aircraft with roles that encompass a variety of civilian and military applications. Their usefulness lies in their unique ability to take off and land vertically, to hover stationary relative to the ground, and to fly forward, backward, or sideways. These unique flying qualities, however, come at a high cost including complex aerodynamic problems, significant vibrations, high levels of noise, and relatively large power requirements compared to fixed-wing aircraft. This book, written by an internationally recognized expert, provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft. Every chapter is extensively illustrated and concludes with a bibliography and homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thorough and up-to-date text on rotating-wing aerodynamics.
Download or read book Modeling and Analysis of Helicopter Ground Resonance Utilizing Symbolic Processing and Dynamic Simulation Software written by Christopher S. Robinson and published by . This book was released on 1997-03-01 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis develops a technique for formulating the full nonlinear equations of motion for a coupled rotor-fuselage system utilizing the symbolic processing software MAPLE(registered). The symbolic software is further utilized to automatically convert the equations of motion into C, Fortran or MATLAB(registered) source code formatted specifically for numerical integration. The compiled source code can be accessed and numerically integrated by the dynamic simulation software SIMULINK(registered). SIMULINK(registered) is utilized to generate time history plots of blade and fuselage motion. These time traces can be used to explore the effects of damping nonlinearities, structural nonlinearities, active control, individual blade control, and damper failure on ground resonance. In addition, a MATLAB(registered) program was developed to apply the Moving Block Technique for determining modal damping of the rotor- fuselage system from the time marching solutions.
Download or read book Some Recent Advances in Computational Aerodynamics for Helicopter Applications written by W. J. McCroskey and published by . This book was released on 1985 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Survey of Theoretical and Experimental Coaxial Rotor Aerodynamic Research written by Colin P. Coleman and published by . This book was released on 1997 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Opportunities in Helicopter Aerodynamics written by W. J. McCroskey and published by . This book was released on 1983 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamic research relating to modern helicopters includes the study of three-dimensional, unsteady, nonlinear flow fields. A selective review is made of some of the phenomenon that hamper the development of satisfactory engineering prediction techniques, but which provides a rich source of research opportunities: flow separations, compressibility effects, complex vortical wakes, and aerodynamic interference between components. Several examples of work in progress are given, including dynamic stall alleviation, the development of computational methods for transonic flow, rotor-wake predictions, and blade-vortex interactions. (Author).
Download or read book Aerodynamics Modeling and Control of an Autonomous Micro Helicopter written by Dario Schafroth and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2011 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotor and control design are two of the most challenging tasks during the development of an autonomous micro helicopter. Both areas are strongly affected by the extremely small size of the vehicle.The rotors are working in the low Reynolds numbers reducing efficiency and limiting the autonomy time of the helicopter. On the control side the small size leads to faster system dynamics and limits the payload for accurate sensors and actuators. These challenges and how to address them are the main topics of this book.In order to increase rotor efficiency, the influence of various blade parameters, lift enhancing devices and the drive train is investigated. The control problem is addressed by developing a nonlinear model for the coaxial helicopter muFly. In order to find the system parameters an identification process is carried out. Finally, the control strategy is presented including both high-level and low-level aspects.Altogether, this book serves as a guideline for other researchers and engineers who aim to develop an autonomous micro helicopter the size and mass of a small bird.
Download or read book Helicopter Flight Dynamics written by Gareth D. Padfield and published by John Wiley & Sons. This book was released on 2018-11-19 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Book The behaviour of helicopters and tiltrotor aircraft is so complex that understanding the physical mechanisms at work in trim, stability and response, and thus the prediction of Flying Qualities, requires a framework of analytical and numerical modelling and simulation. Good Flying Qualities are vital for ensuring that mission performance is achievable with safety and, in the first and second editions of Helicopter Flight Dynamics, a comprehensive treatment of design criteria was presented, relating to both normal and degraded Flying Qualities. Fully embracing the consequences of Degraded Flying Qualities during the design phase will contribute positively to safety. In this third edition, two new Chapters are included. Chapter 9 takes the reader on a journey from the origins of the story of Flying Qualities, tracing key contributions to the developing maturity and to the current position. Chapter 10 provides a comprehensive treatment of the Flight Dynamics of tiltrotor aircraft; informed by research activities and the limited data on operational aircraft. Many of the unique behavioural characteristics of tiltrotors are revealed for the first time in this book. The accurate prediction and assessment of Flying Qualities draws on the modelling and simulation discipline on the one hand and testing practice on the other. Checking predictions in flight requires clearly defined mission tasks, derived from realistic performance requirements. High fidelity simulations also form the basis for the design of stability and control augmentation systems, essential for conferring Level 1 Flying Qualities. The integrated description of flight dynamic modelling, simulation and flying qualities of rotorcraft forms the subject of this book, which will be of interest to engineers practising and honing their skills in research laboratories, academia and manufacturing industries, test pilots and flight test engineers, and as a reference for graduate and postgraduate students in aerospace engineering.
Download or read book Helicopter History and Aerodynamics written by United States. Air Force. Air Training Command and published by . This book was released on 1961 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Mathematical Model of a Single Main Rotor Helicopter for Piloted Simulation written by Peter D. Talbot and published by . This book was released on 1982 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Computational Study of Helicopter Coaxial Rotor Aerodynamics and Performance written by Hyo Won Kim and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Control of a Co Axial Helicopter written by Farid Zare Seisan and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Helicopter Aerodynamics Volume I written by Ray Prouty and published by Lulu.com. This book was released on 2009 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a collection of Ray Prouty's columns from Rotor and Wing magazine from 1979 to 1992.
