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2023 | Book

Electrohydraulic Servo Systems

Applications, Design and Control

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About this book

This book covers the fundamental concepts of electrohydraulic (EH) servo systems in detail and also presents the developments about power, quadratic response, and control flexibility of EH servo systems with applications in aircraft/aerospace engineering, mobile equipment, material/structure testing, motion simulators, and strategic defense sectors. Various topics covered in this books are systems and configurations of servo systems, components, applications, design of SISO and MIMO and control options of SISO and MIMO systems. It further includes a chapter on contamination control, fault detection and diagnosis (FDD) of these systems. The detailed working procedures and advice on implementation routines presented in this book will help readers to apply the control models and systems presented so as to make their own servo systems more efficient. The book will be useful for mechanical engineers and professionals involved in the analysis and design of electrohydraulic control systems, especially in advanced hydraulic industries, the aeronautical and space, and automotive industries. It would also be a useful reference for advanced courses in EH systems.

Table of Contents

Frontmatter
Chapter 1. EH Servo System Configurations
Abstract
With a brief introduction to the taxonomy of Servo Systems, servo valve controlled systems, EHSAs and IM valve controlled systems are described. EHSAs have been adapted for applications in Manufacturing, Humanoid Robots, Quadrupeds and prosthetics. IM valve systems address the poor efficiency of Valve controlled systems used in high power Hydraulic Mobile equipment. A novel exhaustive research on use of double pump based EHSA together with IM valves to improve efficiency while maintaining tracking ability of valve controlled systems is cited here.
D. R. Raghavendra
Chapter 2. EH Servo System Components
Abstract
The range of Hydraulic components, Feedback Transducers and Controllers are tabled with their performance characteristics. A distinction is made between the Torque Motor driven and Voice Coil Driven servo valves.IM valves, Integrated Servo Drive packages, Multi- axis IMUs are listed.
D. R. Raghavendra
Chapter 3. Applications of EH Servo Systems
Abstract
The gamut of engineering applications in the engineering industry using EHSS are recalled under Manufacturing, Mobile, Motion Simulators, Material & Structure Testing, Robots, Defence, Aircraft & Aerospace and others and described.
D. R. Raghavendra
Chapter 4. Design of SISO EH Servo Systems
Abstract
The various Steps in the design process are detailed with respect to a case study.The derivation of Load locus to size power elements, A heuristic approach to estimate closed loop performance from this are presented. It includes Bench Testing means to parameter estimations necessary for grey box models used in Control design.
D. R. Raghavendra
Chapter 5. Control of SISO EH Servo Systems
Abstract
Keeping in view the Control objectives and the challenges of non linearities, parameter variations and structured/unstructured Disturbances,a range of Control Options in Linear/Non linear regions are presented.These include the state variable feedback based LQG, Model based, Sliding Mode Variable Structure and the modern Intelligent Control methods.
D. R. Raghavendra
Chapter 6. Design of MIMO EH Servo Systems
Abstract
Design methods for MIMO systems with Parallel and Serial Kinematics are presented with case studies. An example of a Serial Kinematic 3 DOF Manipulator with Virtual Decomposition Control is tabled. The design employs SMISMO (IM) valves and the energy savings claimed.
D. R. Raghavendra
Chapter 7. Control Options—MIMO
Abstract
The additional challenge of Coupling in MIMO systems are explained and methods for overcoming cited .Centralised and Decentralised Controllers for systems working in free space and in constrained spaces are detailed with examples.Control in constrained spaces demand both position and Force Control. Examples are drawn for both serial, parallel kinematic systems.
D. R. Raghavendra
Chapter 8. Fault-Tolerant Hydraulic Systems
Abstract
Some of the research towards Fault Tolerant Systems aimed for complex and expensive systems are cited here. Notes on Fault avoidance through contamination control, model based methods for Fault Detection and Diagnosis are included. The Signal based Fault Diagnosis methods in the research domain are mentioned.
D. R. Raghavendra
Metadata
Title
Electrohydraulic Servo Systems
Author
D. R. Raghavendra
Copyright Year
2023
Publisher
Springer Nature Singapore
Electronic ISBN
978-981-19-8065-7
Print ISBN
978-981-19-8064-0
DOI
https://doi.org/10.1007/978-981-19-8065-7

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