Hydraulic and Electro-Hydraulic Control Systems

Author: R.B. Walters

Publisher: Springer Science & Business Media

ISBN: 9401138400

Category: Technology & Engineering

Page: 268

View: 1686

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 Merritt,Herbert E. Merritt

Publisher: John Wiley & Sons

ISBN: 9780471596172

Category: Technology & Engineering

Page: 358

View: 4806

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.

Electro Hydraulic Control Theory and Its Applications Under Extreme Environment

Author: Yaobao Yin

Publisher: Butterworth-Heinemann

ISBN: 0128140577

Category: Technology & Engineering

Page: 508

View: 6263

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

Industrial Hydraulic Systems

Theory and Practice

Author: Joji Parambath

Publisher: Universal-Publishers

ISBN: 1627340580


Page: 592

View: 447

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.

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: 1115

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.

In-Flight Simulators and Fly-by-Wire/Light Demonstrators

A Historical Account of International Aeronautical Research

Author: Peter G. Hamel

Publisher: Springer

ISBN: 3319539973

Category: Technology & Engineering

Page: 345

View: 1606

This book offers the first complete account of more than sixty years of international research on In-Flight Simulation and related development of electronic and electro-optic flight control system technologies (“Fly-by-Wire” and “Fly-by-Light”). They have provided a versatile and experimental procedure that is of particular importance for verification, optimization, and evaluation of flying qualities and flight safety of manned or unmanned aircraft systems. Extensive coverage is given in the book to both fundamental information related to flight testing and state-of-the-art advances in the design and implementation of electronic and electro-optic flight control systems, which have made In-Flight Simulation possible. Written by experts, the respective chapters clearly show the interdependence between various aeronautical disciplines and in-flight simulation methods. Taken together, they form a truly multidisciplinary book that addresses the needs of not just flight test engi neers, but also other aeronautical scientists, engineers and project managers and historians as well. Students with a general interest in aeronautics as well as researchers in countries with growing aeronautical ambitions will also find the book useful. The omission of mathematical equations and in-depth theoretical discussions in favor of fresh discussions on innovative experiments, together with the inclusion of anecdotes and fascinating photos, make this book not only an enjoyable read, but also an important incentive to future research. The book, translated from the German by Ravindra Jategaonkar, is an extended and revised English edition of the book Fliegende Simulatoren und Technologieträger , edited by Peter Hamel and published by Appelhans in 2014.