This book presents the latest research results in the area of applied nonlinear dynamics and chaos theory. Papers by three academic generations address new applications of nonlinear dynamics to mechanics, including fluid-structure interaction, machining and mechanics of solids, and many other applications.

This volume is a compendium of papers presented during the NATO Workshop which took place in Capri, Italy, October 12-18, 1986 on the general subject of "Flow Control of Congested Networks: The Case of Data Processing and Transportation," and of which we acted as co-chairmen. The focus of the workshop was on flow control methodologies, as applied to preventing or reducing congestion on: (1) data communication networks; (2) urban transportation networks; and (3) air traffic control systems. The goals of the workshop included: review of the state-of-the-art of flow control methodologies, in general, and in each of the three application areas; identification of similarities and differences in the objective functions, modeling approaches and mathematics used in the three areas; examination of opportunities for "technology transfers" and for future interactions among researchers in the three areaso These goals were pursued through individual presentations of papers on current research by workshop participants and, in the cases of the second and third goals, through a number of open-ended discussion and-review sessions which were interspersed throughout the workshop's programmeD The full texts or extended summaries of all but a few of the papers given at the workshop are included in this volume."

M. Rycroft, FacultyMember, InternationalSpaceUniversity e-mail:[email protected] "The Space Transportation Market: Evolution or Revolution?" was the question which was the focus for the papers presented, and also the Panel Discussions, at the fifth annual Symposium organised by the International Space University. Held in Strasbourg, France, for three lively days at the end of May 2000, the Symposium brought together representatives of the developers, providers and operators of space transportation systems, of regulatory bodies, and of users of the space transportation infrastructure in many fields, as well as experts in policy and market analysis. From the papers published here, it is clear that today's answer to the question tends more towards evolution than to revolution. The space launch industry is still not a fully mature one, and is still reliant on at least partial funding by governments. Better cooperation is essential between governments, launch providers, satellite builders and satellite operators in order to reduce the problems which the space transportation market faces today.

Preface to the Series EUROMOTOR is an advanced training program sponsored by the Eu- pean Union for engineers of the European automotive and supplier ind- try. Its aim is the exchange of experiences with new developments - tween industry and university. Courses are offered in all fields around the automobile, as for example vehicle dynamics, vibration & ergonomics, powertrain, crashworthiness, manufacturing, aerodynamics, testing and - tigue as well as courses in the field of body engineering and electronics. For further information, please contact: EUROMOTOR Support Office, Caroline Marshall, RSBD, University of Birmingham, Birmingham B15 2TT, UK, Tel: +44 (0) 121 414 3695, Fax: +44 (0) 121 414 7151, e-mail: [email protected]. Preface to this volume On June 17th and 18th, the EUROMOTOR Course "1st Aachener El- tronics Symposium" took place at the Institut fur Kraftfahrwesen (ika) in Aachen/Germany. The conference dealt with the main topic "Fusing Strategies for Future Vehicle PowerNets".

1.1. MISSION BACKGROUND The scientific objective of this magnetospheric physics mission was a detailed in vestigation of the Aurora Borealis, or 'Northern Lights'. The fields experiments (electric and magnetic) were constructed by the University of California at Berke ley (UCB), and Los Angeles (UCLA) respectively. The particles instruments were constructed by UCB and the University of New Hampshire in collaboration with Lockheed Palo Alto Research Laboratory. The instrument data processing unit was provided by UCB. The spacecraft bus, telemetry, and launch services were provided by the NASA Goddard Space Flight Center SMEX office. The science principal investigator is Dr C. W. Carlson of UCB, and the program is managed by the SMEX office. The UCB design philosophy emphasizes the demonstration of design margins set by peer review. As a result, each boom system was extensively tested at a prototype level before the flight units were manufactured. Additionally, the design, assembly and testing of each boom mechanism was conducted by a single engineer solely responsible for its success.

Rodney E. Slater Secretary of Transportation, U. S. Department of Transportation know many of you have traveled great distances to be here. I To me, that shows not only your dedication to the cause, but demonstrates how very important transportation safety is becoming throughout the world. So I am very thankful to the main organizers of this third annual conference -- all of whom are from Sweden: Dr. Hans von Holst of the Royal Institute of Technology; Dr. Ake Nygren of the Karolinska Institute; Dr. Ake E. Andersson of the Institute for Futures Studies; and finally, Dr. Arne Witt16v and Lars Anell from AB Volvo. And let me give a special welcome to our friends from Africa. I will be visiting a number of African nations in January. And while my main mission is to promote trade and investment with the United States, we will be talking about safety, too. Airline safety, for example, is a big concern, as Africa grows and prospers and the demand for air travel expands. We discussed it during recent meetings of the International Civil Aviation Organization in Montreal several weeks ago. And we will do so again during my trip. plan to talk about how my department can help the Also, we many nations of Africa improve highway safety. Africa relies heavily on road transportation. But highway fatalities are very high. And the economic costs are very steep, especially for Africa's fragile, emerging v market economies.

The rapidly growing need for mobility has brought with it a major challenge for improvement in the operation and utilization of automotive systems. The economical, environmental and safety constraints imposed by the increase in the number of road vehicles and subsequent government policies also require substantial product development through the application of infor mation technology. This involves the enhancement of vehicle informatics and telematic systems with additional sensors and systems. The advance in the design and development of automotive sensory systems is so rapid that there is urgent need for the experts involved in the technology to work together to provide a reference book for the engineer of today and tomorrow. This motivated me to spend two years researching the topics and the basis on which such a book should be written. The result is the present compilation of the work of international experts on the state-of-the-art in the field of automotive sensory systems. Thus, a unique collection has been created for the reference of all those concerned with, or interested in, the design and development of modern, safe and intelligent vehicles. Although this book is intended for engineers, managers, scientists, academicians and policy makers, students should also find it valuable. To meet the requirements of students the basics are explained in simple terms; however, it is hoped that others will appreciate this approach, since most of us are well aware that gaps remain in our knowledge of the elements of our profession."

Microsystems are an important success factor in the automobile industry. In order to fulfil the customers' requests for safety convenience and vehicle economy, and to satisfy environmental requirements, microsystems are becoming indispensable. Thus a large number of microsystem applications came into the discussion. With the international conference AMAA 2000, VDI/VDE-IT provides a platform for the discussion of all MST relevant components for automotive applications. The conference proceedings gather the papers by authors from automobile suppliers and manufacturers.

The assessment of crack initiation and/or propagation has been the subject of many past discussions on fracture mechanics. Depending on how the chosen failure criterion is combined with the solution of a particular theory of continuum mechanics, the outcome could vary over a wide range. Mod elling of the material damage process could be elusive if the scale level of observation is left undefined. The specification of physical dimension alone is not sufficient because time and temperature also play an intimate role. It is only when the latter two variables are fixed that failure predictions can be simplified. The sudden fracture of material with a pre-existing crack is a case in point. Barring changes in the local temperature,* the energy released to create a unit surface area of an existing crack can be obtained by considering the change in elastic energy of the system before and after crack extension. Such a quantity has been referred to as the critical energy release rate, G e, or stress intensity factor, K Ie. Other parameters, such as the crack opening displacement (COD), path-independent J-integral, etc. , have been proposed; their relation to the fracture process is also based on the energy release concept. These one-parameter approaches, however, are unable simultaneously to account for the failure process of crack initiation, propagation and onset of rapid fracture. A review on the use of G, K I, COD, J, etc. , has been made by Sih [1,2].

G. Volpato, A. Camuffo, A. Comacchio 1.1 The background During recent years the dynamics of automotive industry and its supply chain has catalysed the attention and the research effort of a wide international group of scholars as: the International Motor Vehicle Program (JMVP) of Massachusetts Institute of Technology, the Permanent Study Group for the Automobile Industry and Its Employees (GERPISA) of Paris, and the International Car Distribution l Programme (ICDP) of Solihull. This favoured the publication of relevant studies and the growth of networks of academicians and practitioners interested in studying the patterns of industry evolution and in organising meetings to present and discuss issues of common interest. In 1992 some members of these research projects decided to organize a first conference in Berlin dedicated to the main theme of automation and organization in the automobile industry. In 1993 a second conference took place in Tokyo, followed by a technical visit to a few automobile manufacturers and components suppliers plants (Toyota, Nissan, Mitsubishi, etc.).

Weltweit ist eine Zunahme neuer Hubschrauberentwurfe zu beobachten. Interne Vibrationsminderung und externe Gerauschentwicklung haben dabei als Entwicklungsziele stark gewonnen. Entscheidend bleiben weiterhin die Fliegbarkeit, als Flugmechanik bezeichnet, sowie die moegliche Nutzlast in Abhangigkeit von der Reichweite. Der Inhalt dieser 4. Auflage beschreibt diesbezugliche Entwicklungserfolge. Der Hubschrauber ist ein hoch komplexes System, im konstruktiven Aufbau sowie auf seine Dynamik bezogen. Die dafur notwendigen grundlegenden Kenntnisse der Besonderheiten fur Ingenieure und Nutzer vermittelt der Autor. Er behandelt die flugmechanischen Zusammenhange auf der Basis der relevanten Bauelemente: Steuerungssystem samt Verstarkungshydraulik, Taumelscheibe und Mischhebelgetriebe, zur Ansteuerung der Rotorblatter und damit zur Kontrolle des Hubschraubers im Normalbetrieb. Schwerpunkt ist die Flugmechanik, die zentrale Wissenschaft der gesamten Flugtechnik, zur Identifizierung der Flugstabilitaten und der noetigen Steuerbarkeit. Definitionen und Vereinbarungen werden genannt, im Rahmen der Auslegung werden Abflugmasse und Flugleistungen bestimmt. Die AR (Autorotation) als gefahrloses Landeverfahren wird erklart und der Bodeneffekt wird dargestellt. Die Kosten der Entwicklung und des spateren Betriebes werden ermittelt. Der Autor geht auch auf hubschrauberspezifische Besonderheiten ein: die gewunschte Nahe zu den zahlreichen Blattresonanzen, das Wirbelringstadium, die Flattergrenze, die dynamischen Kopplungen, der UEbergang von den DMZ (Dead Man`s Zone beim Flachenflugzeug) zur fast harmlosen AZ (Avoid Zone) des Hubschraubers. Aus den Bewegungsgleichungen entsteht die Dynamikmatrix, in der alle Eigenbewegungen enthalten sind, die Stabilitaten. Dagegen wirken die konstruktiv zu dimensionierenden Steuerbarkeiten, von den traditionellen niedrigen bis zu den heute moeglichen hohen Frequenzen. Einige Abschnitte wurden entsprechend neuester Erkenntnisse erweitert, z. B. die der dynamische Kopplungen und der Forschungsergebnisse im Bereich der noch weitgehend unerforschten einstationaren Aerodynamik, hubschraubertypisch, fur die ein Anstoss gegeben wird. Das Buch unterstutzt Leser, die sich mit Hubschrauberentwicklung und deren Betrieb befassen. Die zu erfullenden Forderungen und anzuwendenden Vorschriften lernt er kennen und kann sie rechtzeitig einbringen. Der Leser kann eine sachgerechte Beurteilung der zu erwartenden Flugeigenschaften und Kosten abgeben.

In 1976 a similar titled IUTAM Symposium (Structure of Turbulence and Drag Reduction) was held in Washington . However, the progress made during the last thirteen years as weil as the much promising current research desired a second one this year. In Washington drag reduction by additives and by direct manipulation of the walls (compliant walls and heated surfaces) were discussed. In the meantime it became evident that drag reduction also occurs when turbulence is influenced by geometrical means, e.g. by influencing the pressure distribution by the shape of the body (airfoils) or by the introduction of streamwise perturbances on a body (riblets). In the recent years turbulence research has seen increasing attention being focused on the investigation of coherent structures, mainly in Newtonian fluids. We all know that these structures are a significant feature of turbulent flows, playing an important role in the energy balance in such flows. However their place in turbulence theories as weil as the factors influencing their development are still poorly understood. Consequently, the investigation of phenomena in which the properties of coherent structures are alte red provides a promising means of improving our understanding of turbulent flows in general.

Dry Clutch Control for Automated Manual Transmission Vehiclesanalyses the control of a part of the powertrain which has a key role in ride comfort during standing-start and gear-shifting manoeuvres. The mechanical conception of the various elements in the driveline has long since been optimised so this book takes a more holistic system-oriented view of the problem featuring: a comprehensive description of the driveline elements and their operation paying particular attention to the clutch, a nonlinear model of the driveline for simulation and a simplified model for control design, with a standing-start driver automaton for closed loop simulation, a detailed analysis of the engagement operation and the related comfort criteria, different control schemes aiming at meeting these criteria, friction coefficient and unknown input clutch torque observers, practical implementation issues and solutions based on experience of implementing optimal engagement strategies on two Renault prototypes.

The subject of this brief is the application of linear parameter-varying (LPV) control to a class of dynamic systems to provide a systematic synthesis of gain-scheduling controllers with guaranteed stability and performance. An important step in LPV control design, which is not well covered in the present literature, is the selection of weighting functions. The proper selection of weighting functions tunes the controller to obtain the desired closed-loop response. The selection of appropriate weighting functions is difficult and sometimes appears arbitrary. In this brief, gain-scheduling control with engineering applications is covered in detail, including the LPV modeling, the control problem formulation, and the weighting function optimization. In addition, an iterative algorithm for obtaining optimal output weighting functions with respect to the H2 norm bound is presented in this brief. Using this algorithm, the selection of appropriate weighting functions becomes an automatic process. The LPV design and control synthesis procedures in this brief are illustrated using: * air-to-fuel ratio control for port-fuel-injection engines; * variable valve timing control; and * application to a vibration control problem. After reading this brief, the reader will be able to apply its concepts to design gain-scheduling controllers for their own engineering applications. This brief provides detailed step-by-step LPV modeling and control design strategies along with an automatic weight-selection algorithm so that engineers can apply state-of-the-art LPV control synthesis to solve their own engineering problems. In addition, this brief should serve as a bridge between the H-infinity and H2 control theory and the real-world application of gain-scheduling control.

The research work of the collaborative research center SFB401 Flow Modulation and Fluid-Structure Interaction at Airplane Wings at the Rheinisch-Westfalische Technische Hochschule (RWTH) Aachen, which is reported in this book, was pos sible due to the financial support of the Deutsche Forschungsgemeinschaft (DFG). The proposal has been approved after evaluation by the referees of DFG selected from other universities and industry, which is gratefully acknowledged. The work is still in progress and now approved to continue until the end of year 2005. More than 50 scientists from universities of the United States, Russia, France, Italy, Japan, Great Britain, Sweden, Netherlands, Switzerland, Austria and research orga nizations NASA, ONERA, NLR, DLR could be invited and have visited the research center, gave seminars on their research on related topics and some of them stayed longer for joined work. Besides its scientific value, also the importance of the pro gram for scientific educa tion becomes evident by looking at the numbers of completed theses, which are up to now about 15 doctoral theses, 40 diploma theses and 70 study theses. The authors of this book acknowledge the valuable support coming from all these persons and institutions. They are especially grateful to the referees having reviewed this work, A. Cohen (Universite Pierre et Marie Curie), J. Cooper (Manchester School of Engineering), W. Devenport (Virginia Tech.), M. Drela (MIT), F. Gern (Avionics Specialties Inc.), A. Griewank (TU Dresden), H. Honlinger (DLR), P."

This volume contains eighteen contributions of work, conducted since 2000 in the French - German Research Programme "Numerical Flow Simulation," which was initiated in 1996 by the Centre National de la Recherche Scientifique (CNRS) and the Deutsche Forschungsgemeinschaft (DFG). The main purpose of this third publication on the research programme is again to give an overview over recent progress, and to make the obtained results available to the public. The reports are grouped, like those in the first and the second publi cation (NNFM 66, 1998, and NNFM 75, 2001), under the four headings "Devel opment of Solution Techniques," "Crystal Growth and Melts," "Flows of React ing Gases, Sound Generation" and "Turbulent Flows." All contributions to this publication were reviewed by a board consisting of T. Alziary de Roquefort (Poi tiers, France), H. W. Buggisch (Karlsruhe, Germany), S. Candel (Paris, France), U. Ehrenstein (Nice, France), Th. Gallouet (Marseille, France), W. Kordulla (Gottingen, Germany), A. Lerat (Paris, France), 1. Piquet (Nantes, France), R. Rannacher (Heidelberg, Germany), G. Warnecke (Magdeburg, Germany), and the editor. The responsibility for the contents of the reports nevertheless lies with the contributors."

Liquid helium has been studied for its intrinsic interest through much of the 20th century. In the past decade, much has been learned about heat transfer in liquid helium because of the need to cool superconducting magnets and other devices. The topic of the Seventh Oregon Conference on Low Temperature Physics was an applied one, namely the use of liquid and gaseous helium to generate high Reynolds number flows. The low kinematic viscosity of liquid helium automatically makes high Reynolds numbers accessible and the question addressed in this conference was to explore various possibilities to see what practical devices might be built using liquid or gaseous helium. There are a number of possibilities: construction of a wind tunnel using critical helium gas, free surface testing, low speed flow facilities using helium I and helium ll. At the time of the conference, most consideration had been given to the last possibility because it seemed both possible and useful to build a flow facility which could reach unprecedented Reynolds numbers. Such a device could be useful in pure research for studying turbulence, and in applied research for testing models much as is done in a water tunnel. In order to examine these possibilities in detail, we invited a wide range of experts to Eugene in October 1989 to present papers on their own specialties and to listen to presentations on the liquid helium proposals.

This reference collects the latest information from the International Conference on Heavy Vehicles, specifically as it relates to Heavy Vehicle Transport Technology.? Among the topics detailed are: interactions between heavy vehicles or trains and the infrastructure, environment and other system users; heavy vehicle and road management information-measurements, data quality, data management; freight mobility and safety; vehicle classification, size and weight evaluation, regulations, and enforcement; and traffic and road safety.

The aim of the present book is the formulation, mathematical study and numerical treatment of static and dynamic problems in mechanics and engineering sciences involving nonconvex and nonsmooth energy functions, or nonmonotone and multivalued stress-strain laws. Such problems lead to a new type of variational forms, the hemivariational inequalities, which also lead to multivalued differential or integral equations. Innovative numerical methods are presented for the treament of realistic engineering problems. This book is the first to deal with variational theory of engineering problems involving nonmonotone multivalue realations, their mechanical foundation, their mathematical study (existence and certain approximation results) and the corresponding eigenvalue and optimal control problems. All the numerical applications give innovative answers to as yet unsolved or partially solved engineering problems, e.g. the adhesive contact in cracks, the delamination problem, the sawtooth stress-strain laws in composites, the shear connectors in composite beams, the semirigid connections in steel structures, the adhesive grasping in robotics, etc. The book closes with the consideration of hemivariational inequalities for fractal type geometries and with the neural network approach to the numerical treatment of hemivariational inequalities.

Why this book? Simply because it is due. Cognitive automation and its system-ergonomic introduction into work systems have been advanced in the meantime to such a degree that already applications for operational work systems are slowly becoming reality. This book shall contribute to give system designers some more guidelines about designing work systems and associated cognitive machines effectively, in particular those related to guidance and control of manned and unmanned vehicles. The issue is that the findings on cognition have to become sufficient commonsense for all from the various disciplines involved in system design, and that guidelines are given how to make use of it in an appropriate and systematic manner. These guidelines are to account for both the needs of the human operator in the work process and the use of computational potentials to make the work system a really most effective one. In other words, this book is meant to provide guidelines for the organisational and technical design of work systems. Therefore, this book is an interdisciplinary one. Findings in individual disciplines are not the main issue. It is rather the combination of these findings for the sake of the performance of work systems which makes this book a useful one for designers who are interested in this modern approach and its implementation.

In the process industries, stiction is the most common performance-limiting valve problem and over the last decade numerous different techniques for overcoming it have been proposed. This book represents a comprehensive presentation of these methods, including their principles, assumptions, strengths and drawbacks. Guidelines and working procedures are provided for the implementation of each method and MATLAB (R)-based software can be downloaded from www.ualberta.ca/~bhuang/stiction-book enabling readers to apply the methods to their own data. Methods for the limitation of stiction effects are proposed within the general context of: oscillation detection in control loops, stiction detection, diagnosis and stiction quantification and diagnosis of multiple faults. The state-of-the-art algorithms presented in this book are demonstrated and compared in industrial case studies of diverse origin - chemicals, building, mining, pulp and paper, mineral and metal processing.

The editors have published a select group of full length papers on boundary element analysis (BEA) photographed from camera ready manuscripts. The articles have been prepared by some of the most distinguished and prolific individuals in this field. More than half of these articles have been submitted by authors that participated in an International Forum on Boundary Element Methods, in Melbourne Australia, in the Summer of 1991. However, this volume is not a conference proceedings, as these authors have expanded their accounts to chapter length, and/or have tailored their expositions more toward the style employed in archival journal publications. The authors that did not participate in the International Forum have also adhered to the above mentioned philosophy. This work contains a definitive representation of the significant capabilities and applications currently available or under investigation that fall under the general category of advanced boundary element analysis. With treatments of mechanical, thermal, fluid, and electromagnetic phenomena, this book should thus be of value to graduate students, practitioners, and researchers in engineering, mathematics, and the physical sciences wishing to obtain a broader perspective or remain current in these important areas of computational simulation.

Thin shells are very popular structures in many different branches of engineering. There are the domes, water and cooling towers, the contain ments in civil engineering, the pressure vessels and pipes in mechanical and nuclear engineering, storage tanks and platform components in marine and offshore engineering, the car bodies in the automobile industry, planes, rockets and space structures in aeronautical engineering, to mention only a few examples of the broad spectrum of application. In addition there is the large applied mechanics group involved in all the computational and experimental work in this area. Thin shells are in a way optimal structures. They play the role of.the "primadonnas" among all kinds of structures. Their performance can be extraordinary, but they can also be very sensitive. The susceptibility to buckling is a typical example. David Bushnell says in his recent review paper entitled "Buckling of Shells - Pitfall for DeSigners" "To the layman buckling is a mysterious, perhaps even awe inspiring phenomenon that transforms objects originally imbued with symmetrical beauty into junk.""

This book contains some new developments in the area of Structural Dynamics. In general it reflects the recent efforts of several Austrian research groups during the years 1985 - 1990. The contents of this book cover both theoretical developments as well as practical applications and hence can be utilized by researchers as well as the practicing engineers. Quite naturally, realistic modeling of a number of load types such as wind and earthquake loading, etc. , requires taking into account statistical uncertainties. Hence these loads have to be characterized by stochastic processes. As a consequence, stochastic aspects must play a major role in modem structural dynamics. Since an extended modeling of the load processes should not be counterbalanced by simplifying the structural models, considerable efforts have been put into the development of procedures which allow the utilization of e. g. FE models and codes which are utilized presently in context with simplified, i. e. "deterministic" load models. Thus the processing of the additional information on loads as well as including statistical properties of the material allows to provide additional answers, i. e. quantification of the risk of structural failure. This volume concentrates on four major areas, i. e. on load modeling, structural response analysis, computational reliability procedures, and finally on practical application. Quite naturally only special fields and particular, i. e. selected types of problems can be covered. Specific reference is made, however, to cases where generalizations are possible.