Mobile Working Hydraulic System Dynamics

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Mobile Working Hydraulic System Dynamics

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Author : Mikael Axin
language : en
Publisher: Linköping University Electronic Press
Release Date : 2015-09-07

Mobile Working Hydraulic System Dynamics written by Mikael Axin and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-09-07 with Hydraulic engineering categories.

This thesis deals with innovative working hydraulic systems for mobile machines. Flow control systems are studied as an alternative to load sensing. The fundamental difference is that the pump is controlled based on the operator’s command signals rather than feedback signals from the loads. This control approach enables higher energy efficiency and there is no load pressure feedback causing stability issues. Experimental results show a reduced pump pressure margin and energy saving potential for a wheel loader application. The damping contribution from the inlet and outlet orifice in directional valves is studied. Design rules are developed and verified by experiments. A novel system architecture is proposed where flow control, load sensing and open-centre are merged into a generalized system description. The proposed system is configurable and the operator can realize the characteristics of any of the standard systems without compromising energy efficiency. This can be done non-discretely on-the-fly. Experiments show that it is possible to avoid unnecessary energy losses while improving system response and increasing stability margins compared to load sensing. Static and dynamic differences between different control modes are also demonstrated experimentally.

Mobile Working Machines

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Author : Marcus Geimer
language : en
Publisher: SAE International
Release Date : 2020-12-31

Mobile Working Machines written by Marcus Geimer and has been published by SAE International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-12-31 with Technology & Engineering categories.

Mobile Working Machines are defined by three characteristics. These machines have a cer-tain task of doing a working process, they are mobile, and they have a signifi cant energy share in their working functions. The machines should be as productive, efficient and of high quality as possible. All these machines in the fi eld of agriculture, forestry, construction, logistics, municipal sector, and in other special applications work in different applications. But, many technologies placed in the machines are the same, similar or comparable; therefore, different branches can learn from each other. Mobile Working Machines provides a wide and deep view into the technologies used in these machines. Appropriate for new engineers as well as those who wish to increase their knowledge in this field, this book brings together all the latest research and development into one place.

Independent Metering Electro Hydraulic Control System

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Author : Ruqi Ding
language : en
Publisher: Springer Nature
Release Date : 2024-02-20

Independent Metering Electro Hydraulic Control System written by Ruqi Ding and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-02-20 with Technology & Engineering categories.

This book shows an independent metering electro-hydraulic control system involving its flexible hardware layouts, complex software control, representative products and applications. The book includes one chapter introducing the background and motivation of the independent metering electro-hydraulic control system. It also includes one chapter to summarize various hardware layouts involving the utilized hydraulic components and circuits, as well as analyze their advantages and disadvantages. It emphatically consists of four chapters demonstrating the detailed multivariable control strategies from three levels: load, valve and pump, together with fault-tolerant control under the fault condition. It includes a last chapter, in which products of independent metering control valve and their applications in some typical heavy-duty mobile machinery are collective works of reviews illustrative of recent advances. This book is interesting and useful to a wide readership in thevarious fields of fluid power transmission and control.

Hydraulic Systems For Mobile Equipment

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Author : TIMOTHY W. DELL
language : en
Publisher:
Release Date : 2021-12-06

Hydraulic Systems For Mobile Equipment written by TIMOTHY W. DELL and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-12-06 with categories.

Hydraulic Systems for Mobile Equipment is the gold standard for hydraulics instruction, offering a comprehensive, single-source resource for introductory and advanced content. It provides very detailed, high-level instruction for students studying to become professional mobile hydraulics service technicians. With a primary emphasis on agricultural and construction machinery, it can also empower students working in any related field of hydraulics. The textbook is correlated to the competencies of the AED Hydraulics/Hydrostatics and Administrative/Safety Standards and the ASE Education Foundation Heavy Trucks Task List.

Fluid Power Pumps And The Electrification

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Author : Samuel Kärnell
language : en
Publisher: Linköping University Electronic Press
Release Date : 2020-05-25

Fluid Power Pumps And The Electrification written by Samuel Kärnell and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-25 with categories.

More and more vehicles are being electrified. Mobile working machines and heavy trucks are not excluded, and these machines are often hydraulically intense. Electrification entails new requirements for the hydraulic system and its components, and these requirements must be taken into consideration. Hydraulic systems have looked similar for a long time, but now there is an opportunity to advance. Many things change when a diesel engine is replaced with an electric motor. For example, variable-speed control becomes more relevant, electric regeneration becomes possible, and the use of multiple prime movers becomes an attractive alternative. The noise from the hydraulic system will also be more noticeable when the diesel engine is gone. Furthermore, the introduction of batteries to the system makes the energy more valuable, since batteries are heavy and costly compared to a diesel tank. Therefore, it is commercially viable to invest in the hydraulic system. This thesis revolves around the heart of the hydraulic system, that also is the root of all evil. That is the pump. Traditionally, a pump has had either a fixed displacement or a continuously variable displacement. Here, the focus is on something in between, namely a pump with discrete displacement. The idea of discrete displacement is far from unique, but has not been investigated in detail in combination with variable speed before. In this thesis, a novel design for a quiet pump with discrete displacement is presented and analysed. The results show that discrete displacement is relevant from an energy perspective for machines working extensively at high pressure levels and with low flow rates, and that a few discrete values are enough to make a significant difference. However, for other cycles, the possible energy gains are very limited, but the discrete displacement can be a valuable feature if downsizing the electric machine is of interest.

Modelling Monitoring And Diagnostic Techniques For Fluid Power Systems

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Author : John Watton
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-03-24

Modelling Monitoring And Diagnostic Techniques For Fluid Power Systems written by John Watton and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-03-24 with Technology & Engineering categories.

This book covers the background theory of fluid power and indicates the range of concepts needed for a modern approach to condition monitoring and fault diagnosis. The theory is leavened by 15-years-worth of practical measurements by the author, working with major fluid power companies, and real industrial case studies. Heavily supported with examples drawn from real industrial plants – the methods in this book have been shown to work.

Hydraulic Power System Analysis

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Author : Arthur Akers
language : en
Publisher: CRC Press
Release Date : 2006-04-17

Hydraulic Power System Analysis written by Arthur Akers and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-04-17 with Technology & Engineering categories.

The excitement and the glitz of mechatronics has shifted the engineering community’s attention away from fluid power systems in recent years. However, fluid power still remains advantageous in many applications compared to electrical or mechanical power transmission methods. Designers are left with few practical resources to help in the design and analysis of fluid power systems, especially when approaching fluid power for the first time. Helping you overcome these hurdles, Hydraulic Power System Analysis demonstrates modern computer-aided analytical techniques used to model nonlinear, dynamic fluid power systems. Following an overview of fluid power, the authors examine various relevant fluid properties, energy calculations, and steady state and dynamic analysis along with a review of automatic control theory. Turning to modeling, the next few chapters address valves and motors and then apply dynamic modeling to examples relating to pumps, hydrostatic transmissions, and valves. The book includes a unique chapter showing how to combine flow resistance equations with the differential equations governing dynamic system performance. The final chapter translates electrical circuit theory concepts to noise attenuation in fluid power systems. Illustrated with many equations, practical computer modeling examples, and exercises, Hydraulic Power System Analysis provides a much-needed modernization of dynamic modeling for fluid power systems using powerful computational tools.

Design Of Hydraulic Systems For Lift Trucks

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Author : Ivan Gramatikov
language : en
Publisher: Lulu.com
Release Date : 2011

Design Of Hydraulic Systems For Lift Trucks written by Ivan Gramatikov and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

Proceedings Of The 2nd International Conference On The Frontiers Of Robotics And Software Engineering Frse 2024

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Author : Jiangping Hu
language : en
Publisher: Springer Nature
Release Date : 2025-03-07

Proceedings Of The 2nd International Conference On The Frontiers Of Robotics And Software Engineering Frse 2024 written by Jiangping Hu and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-03-07 with Technology & Engineering categories.

The proceeding of FRSE presents a collection of innovation research in the cutting edge fields of robotics and software engineering. It is highlighted within that there are novel methodologies, critical analyses, and breakthrough results which emphasize the enhanced or amplified results achieved when robotics technologies are integrated with advanced software. This book is outfitted with numerous diagrams, tables, and conceptual frameworks, structured to enhance comprehension and accessibility, that facilitate a deeper understanding of complex topics. The presentation is not just theoretical but includes case studies and real-world applications, offering a practical approach to complex problem-solving techniques across related industries. Readers will receive benefits from this comprehensive resource, gain a renew understanding of contemporary challenges and innovative solutions in robotics and software engineering. And this book will be a guide and asset for research scholars and professionals in robotics and software engineering looking to apply these these cutting-edge technologies in impactful ways.

System Dynamics

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Author : Karl A. Seeler
language : en
Publisher: Springer
Release Date : 2014-08-26

System Dynamics written by Karl A. Seeler and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-08-26 with Technology & Engineering categories.

This unique textbook takes the student from the initial steps in modeling a dynamic system through development of the mathematical models needed for feedback control. The generously-illustrated, student-friendly text focuses on fundamental theoretical development rather than the application of commercial software. Practical details of machine design are included to motivate the non-mathematically inclined student.