Electro-Hydraulic Components and Systems

Hydraulic Systems

Author: Medhat M K Dr Khalil

Publisher: N.A

ISBN: 9780997763423


Page: N.A

View: 8873

This book is the second in its series. The book focuses on the electrohydraulic valves in building open-loop and closed-loop control systems. The book also covers the control electronics that drive the EH valves.

Electro-Hydraulic Components and Systems - Workbook

Author: Dr Medhat Khalil

Publisher: N.A

ISBN: 9780997781625


Page: N.A

View: 6364

This Workbook is a complementary part to the textbook of the same title. This book is used as a workbook for students to take notes during the course delivery. It contains colored printout of the PowerPoint slides that are designed to present the course. Each chapter is followed by a number of review questions and assignments for homework.

Electro Hydraulic Control Theory and Its Applications Under Extreme Environment

Author: Yaobao Yin

Publisher: Butterworth-Heinemann

ISBN: 9780128140567


Page: 300

View: 824

Electro hydraulic Control Theory and its Applications Under Extreme Environment not only presents an overview on the topic, but also delves into the fundamental mathematic models of electro hydraulic control and the application of key hydraulic components under extreme environments. The book contains chapters on hydraulic system design, including thermal analysis on hydraulic power systems in aircraft, power matching designs of hydraulic rudder, and flow matching control of asymmetric valves and cylinders. With additional coverage on new devices, experiments and application technologies, this book is an ideal reference on the research and development of significant equipment. Addresses valves' application in aircrafts, including servo valves, relief valves and pressure reducing valves Presents a qualitative and quantitative forecast of future electro-hydraulic servo systems, service performance, and mechanization in harsh environments Provides analysis methods, mathematical models and optimization design methods of electro-hydraulic servo valves under extreme environments

Pneumatic and Hydraulic Components and Instruments in Automatic Control

Proceedings of the IFAC Symposium, Warsaw, Poland, 20-23 May 1980

Author: H. J. Leskiewicz,M. Zaremba

Publisher: Elsevier

ISBN: 1483155315

Category: Technology & Engineering

Page: 290

View: 4009

Pneumatic and Hydraulic Components and Instruments in Automatic Control covers the proceedings of the International Federation of Automatic Control (IFAC) Symposium. The book reviews papers that tackle topics relating to the use of pneumatic and hydraulic equipment in automatic control. This text discusses topics such as dynamic behavior analysis of pneumatic components by numerical techniques and application of bond graphs to the digital simulation of a two-stage relief valve dynamic behavior. Topics including mathematical modeling of cavitation in hydraulic pumps; pro and contra electro-fluid analogies in digital simulation of fluid circuits; and improvement in accuracy of pneumatic delay are covered as well. This book will be of great use to researchers and professionals whose work involves the designing of automatic control systems.

Hydraulic and Electro-Hydraulic Control Systems

Author: R.B. Walters

Publisher: Springer Science & Business Media

ISBN: 9401138400

Category: Technology & Engineering

Page: 268

View: 4094

Force and motion control systems of varying degrees of sophistication have shaped the lives of all individuals living in industrialized countries all over the world, and together with communication technology are largely responsible for the high standard ofliving prevalent in many communities. The brains of the vast majority of current control systems are electronic, in the shape of computers, microprocessors or programmable logic controllers (PLC), the nerves are provided by sensors, mainly electromech anical transducers, and the muscle comprises the drive system, in most cases either electric, pneumatic or hydraulic. The factors governing the choice of the most suitable drive are the nature of the application, the performance specification, size, weight, environ mental and safety constraints, with higher power levels favouring hydraulic drives. Past experience, especially in the machine tool sector, has clearly shown that, in the face of competition from electric drives, it is difficult to make a convincing case for hydraulic drives at the bottom end of the power at fractional horsepower level. A further, and frequently range, specifically overriding factor in the choice of drive is the familiarity of the system designer with a particular discipline, which can inhibit the selection of the optimum and most cost-effective solution for a given application. One of the objectives of this book is to help the electrical engineer overcome his natural reluctance to apply any other than electric drives.

Hydraulic Control Systems

Author: Herbert E. Merritt

Publisher: John Wiley & Sons

ISBN: 9780471596172

Category: Technology & Engineering

Page: 358

View: 890

The use of hydraulic control is rapidly growing and the objective of this book is to present a rational and well-balanced treatment of its components and systems. Coverage includes a review of applicable topics in fluid mechanisms; components encountered in hydraulic servo controlled systems; systems oriented issues and much more. Also offers practical suggestions concerning testing and limit cycle oscillation problems.

Industrial Hydraulic Systems

Theory and Practice

Author: Joji Parambath

Publisher: Universal-Publishers

ISBN: 1627340580


Page: 592

View: 2585

Industrial Hydraulic Systems provides an in-depth coverage of conventional hydraulic systems encompassing fixed-displacement pumps, control valves, and actuators as well as the most modern hydraulic systems encompassing highly efficient variable-displacement pumps, electro-hydraulic proportional valves and/or servo valves with integrated electronics. The coverage is further supplemented by many typical hydraulic and electro-hydraulic circuits. Details of different types of auxiliary devices such as reservoirs, filters, accumulators, and piping have also been described in this book. Topics on hydrostatic transmission, cartridge valves, load sensing pump controls, fluids, filters, and seals are given in detail. Design, installation, and maintenance aspects of hydraulic systems are added to make the book more useful to actual practitioners of these systems. Understanding the fundamental laws and principles allows the reader to use basic theoretical concepts in practical applications. The unique feature of this textbook is that all quantities are given in the SI system as well as in the English system of units. This book provides an extensive coverage of fluid power to designers, engineers, technicians, and students of engineering colleges, polytechnics, and vocational training institutes. This book, prepared especially with an academic interest in mind, contains a large number of numerical examples, design problems, and sections for 'Test your Knowledge' and end of chapter questions. This book is intended to provide the most current information available on hydraulic technology.

Hydraulic Control Systems

Theory and Practice

Author: Shizurou Konami,Takao Nishiumi

Publisher: World Scientific Publishing Company

ISBN: 981475966X

Category: Technology & Engineering

Page: 328

View: 9201

A hydraulic system controls the transmission of energy. It transforms the mechanical energy of a prime motor into fluid energy. It controls the fluid configuration and transforms the fluid energy into mechanical work at specified locations. Hydraulic systems feature high power density, sensitive response and precision of control, especially when operating under computer control. Thus, they have been widely used as the energy transmission control systems in aircraft, ships, construction machinery, machine tools and others. Therefore, it is indispensable for a mechanical engineer to become versed with hydraulic control technology. The technology is mainly associated with fluid mechanics and control theories, but it is related to the wider field of engineering as well. This book provides a comprehensive treatment of the analysis and design of hydraulic control systems which will be invaluable for practising engineers, as well as undergraduate and graduate students specializing in mechanical engineering. Firstly, the fundamental concepts of hydraulic control systems are addressed, and illustrated by reference to applications in the field of aviation engineering. Secondly, the fluid mechanics necessary for the comprehension of hydraulic elements are provided. The technology of the hydraulic components composing hydraulic control systems is addressed, the key focus being on how to apply theoretical concepts into the design and analysis of hydraulic components and systems. Finally, there is a discussion on fundamental control technology and its application to hydraulic servo systems. This includes the formation of hydraulic servo systems, basic control theorems, methods identifying the dynamic characteristics of hydraulic actuator systems, and a design method for hydraulic control systems. Numerical exercises are provided at the end of each chapter. Request Inspection Copy

Modern Control System Theory and Design

Author: Stanley M. Shinners

Publisher: John Wiley & Sons

ISBN: 9780471249061

Category: Technology & Engineering

Page: 720

View: 6435

A comprehensive treatment of control systems, integrating classical and modern theories while promoting an interactive computer based approach to design solutions. Contains many practical examples.

Simulation of Fluid Power Systems with Simcenter Amesim

Author: Nicolae Vasiliu,Daniela Vasiliu,Constantin C?LINOIU,Radu Puhalschi

Publisher: CRC Press

ISBN: 1482253569

Category: Science

Page: 607

View: 5473

This book illustrates numerical simulation of fluid power systems by LMS Amesim Platform covering hydrostatic transmissions, electro hydraulic servo valves, hydraulic servomechanisms for aerospace engineering, speed governors for power machines, fuel injection systems, and automotive servo systems.

Aircraft hydraulic systems

an introduction to the analysis of systems and components

Author: William L. Green

Publisher: John Wiley & Sons

ISBN: 9780471908487

Category: Technology & Engineering

Page: 137

View: 7490

A comprehensive introduction, suitable for both students and practicing engineers. Thoroughly explains the aircraft General Services and Flying Control Systems and their common components, covers the flying control unit, fluid compressibility, the performance of powered flying controls, stability, and methods for component selection. Worked examples, self-assessment exercises, numerical questions, and references are included.

Commercial Aircraft Hydraulic Systems

Shanghai Jiao Tong University Press Aerospace Series

Author: Shaoping Wang,Mileta Tomovic,Hong Liu

Publisher: Academic Press

ISBN: 0124199925

Category: Technology & Engineering

Page: 276

View: 7710

Commercial Aircraft Hydraulic Systems: Shanghai Jiao Tong University Press Aerospace Series focuses on the operational principles and design technology of aircraft hydraulic systems, including the hydraulic power supply and actuation system and describing new types of structures and components such as the 2H/2E structure design method and the use of electro hydrostatic actuators (EHAs). Based on the commercial aircraft hydraulic system, this is the first textbook that describes the whole lifecycle of integrated design, analysis, and assessment methods and technologies, enabling readers to tackle challenging high-pressure and high-power hydraulic system problems in university research and industrial contexts. Commercial Aircraft Hydraulic Systems is the latest in a series published by the Shanghai Jiao Tong University Press Aerospace Series that covers the latest advances in research and development in aerospace. Its scope includes theoretical studies, design methods, and real-world implementations and applications. The readership for the series is broad, reflecting the wide range of aerospace interest and application. Titles within the series include Reliability Analysis of Dynamic Systems, Wake Vortex Control, Aeroacoustics: Fundamentals and Applications in Aeropropulsion Systems, Computational Intelligence in Aerospace Engineering, and Unsteady Flow and Aeroelasticity in Turbomachinery. Presents the first book to describe the interface between the hydraulic system and the flight control system in commercial aircraft Focuses on the operational principles and design technology of aircraft hydraulic systems, including the hydraulic power supply and actuation system Includes the most advanced methods and technologies of hydraulic systems Describes the interaction between hydraulic systems and other disciplines

Hydraulic Control of Machine Tools

Author: E. M. Khaimovich

Publisher: Elsevier

ISBN: 1483225690

Category: Technology & Engineering

Page: 586

View: 6191

Hydraulic Control of Machine Tools presents the wide range of application of hydraulic drives. This book discusses the methods, principles of design of hydraulic systems, and their equipment. Organized into 11 chapters, this book begins with an overview of hydraulic drives that utilize mainly the kinetic energy of the flow. This text then examines the tasks of hydraulic fluids not only to induce and receive motion but also to be a reliable lubricant for the hydraulic mechanisms. Other chapters consider the various points to be considered in the calculation of hydraulic systems. This book discusses as well the various types of hydraulic circuits that are used in machine tools. The final chapter deals with several examples of hydraulic calculations, including calculations of the axial force exerted by the flow on a valve. This book is a valuable resource for hydraulic specialists and mechanical engineers.

Practical Hydraulic Systems: Operation and Troubleshooting for Engineers and Technicians

Author: Ravi Doddannavar,Andries Barnard,Jayaraman Ganesh

Publisher: Elsevier

ISBN: 9780080455488

Category: Technology & Engineering

Page: 240

View: 8580

Whatever your hydraulic applications, Practical Hydraulic Systems: Operation & Troubleshooting For Engineers & Technicians will help you to increase your knowledge of the fundamentals, improve your maintenance programs and become an excellent troubleshooter of problems in this area. Cutaways of all major components are included in the book to visually demonstrate the components' construction and operation. Developing an understanding of how it works leads to an understanding of how and why it fails. Multimedia views of the equipment are shown, to give as realistic a view of hydraulic systems as possible. The book is highly practical, comprehensive and interactive. It discusses Hydraulic Systems construction, design applications, operations, maintenance, and management issues and provides you with the most up-to-date information and Best Practice in dealing with the subject. * A focus on maintenance and troubleshooting makes this book essential reading for practising engineers. * Written to cover the requirements of mechanical / industrial and civil engineering. * Cutaway diagrams demonstrate the construction and operation of key equipment.

Aerospace Actuators 1

Needs, Reliability and Hydraulic Power Solutions

Author: Jean-Charles Mar?

Publisher: John Wiley & Sons

ISBN: 1848219415

Category: Mathematics

Page: 246

View: 7508

This book is the first of a series of volumes that cover the topic of aerospace actuators following a systems-based approach. This first volume provides general information on actuators and their reliability, and focuses on hydraulically supplied actuators. Emphasis is put on hydraulic power actuators as a technology that is used extensively for all aircraft, including newer aircraft. Currently, takeovers by major corporations of smaller companies in this field is threatening the expertise of aerospace hydraulics and has inevitably led to a loss of expertise. Further removal of hydraulics teaching in engineering degrees means there is a need to capitalize efforts in this field in order to move it forward as a means of providing safer, greener, cheaper and faster aerospace services. The topics covered in this set of books constitute a significant source of information for individuals and engineers seeking to learn more about aerospace hydraulics.

On Electrohydraulic Pressure Control for Power Steering Applications

Active Steering for Road Vehicles

Author: Alessandro Dell'Amico

Publisher: Linköping University Electronic Press

ISBN: 9176858383


Page: 187

View: 412

This thesis deals with the Electrohydraulic Power Steering system for road vehicles, using electronic pressure control valves. With an ever increasing demand for safer vehicles and fewer traffic accidents, steering-related active safety functions are becoming more common in modern vehicles. Future road vehicles will also evolve towards autonomous vehicles, with several safety, environmental and financial benefits. A key component in realising such solutions is active steering. The power steering system was initially developed to ease the driver's workload by assisting in turning the wheels. This is traditionally done through a passive open-centre hydraulic system and heavy trucks must still rely on fluid power, due to the heavy work forces. Since the purpose of the original system is to control the assistive pressure, one way would be to use proportional pressure control valves. Since these are electronically controlled, active steering is possible and with closed-centre, energy efficiency can be significantly improved on. In this work, such a system is analysed in detail with the purpose of investigating the possible use of the system for Boost curve control and position control for autonomous driving. Commercially available valves are investigated since they provide an attractive solution. A model-based approach is adopted, where simulation of the system is an important tool. Another important tool is hardware-in-the-loop simulation. A test rig of an electrohydraulic power steering system, is developed. This work has shown how proportional pressure control valves can be used for Boost curve control and position control and what implications this has on a system level. As it turns out, the valves add a great deal of time lag and with the high gain from the Boost curve, this creates a control challenge. The problem can be handled by tuning the Boost gain, pressure response and damping and has been effectively shown through simulation and experiments. For position control, there is greater freedom to design the controller to fit the system. The pressure response can be made fast enough for this case and the time lag is much less critical.