Electro-Hydraulic Actuation Systems (eBook)
XIII, 63 Seiten
Springer Singapore (Verlag)
978-981-13-2547-2 (ISBN)
The book serves as a unique integrated platform, which not only describes the design methodology of electro-hydraulic actuation systems but also provides insights into the design of the servo valve, which is the most important component in the system. It presents a step-by-step design process, comparative tables, illustrative figures, and detailed explanations. The book focuses on the design and testing of electro-hydraulic actuation systems, which are increasingly being used in motion control applications, particularly in those where precision actuation at high operational rates is of prime importance. It describes in detail the design philosophy of such high-performance systems, presenting a system used as a physical test setup together with experimental results to corroborate the calculations. Of particular interest are the electro-hydraulic servo valves that form the heart of these actuations. These valves are complex and not much data is available in open literature due to OEM propriety issues. In this context, the book discusses the elaborate mathematical models that have been derived and an approach to validate the mathematical models with test results. Presenting the complex methodology in simple language, it will prove to be a valuable resource for students, researchers, and professional engineers alike.
Jaidev Vyas is a Scientist at the Mechanical Systems Design Group in the Structural Technologies Division of the National Aerospace Laboratories-CSIR, Bangalore, India. His research areas include aircraft hydraulic systems, fuel systems, ECS and landing gear. He received his M.Tech. in Thermal Engineering from the National Institute of Technology Warangal, India in 2008. Balamurugan Gopalsamy is a Principal Scientist and Head of the Mechanical Systems Design Group, Structural Technologies Division at the National Aerospace Laboratories-CSIR, Bangalore, India. His research areas include aircraft hydraulic systems, fuel systems, ECS and landing gear systems. He completed his Ph.D. in Mechanical Engineering under the DAAD Sandwich programme at NIT, Durgapur, and RWTH Aachen-Fraunhofer IPT, Aachen in 2011. Harshavardhan M. Joshi is a Senior Project Engineer at the Mechanical Systems Design Group in the Structural Technologies Division of the National Aerospace Laboratories-CSIR, Bangalore, India. His research areas include aircraft hydraulic systems. He received his B.E. in Mechanical Engineering from Sapthagiri College of Engineering, Bengaluru, India in 2014.
Preface 6
Contents 7
About the Authors 9
List of Figures 10
List of Tables 12
1 Introduction 13
1.1 Design Philosophy 14
1.2 Design Prerequisites 16
1.3 Preliminary Design 16
1.3.1 Actuator Load Calculations 16
1.3.2 Maximum Loading Condition 17
1.3.3 Flow Rate Requirement Calculation 19
1.3.4 Motor Selection 19
1.3.5 Fluid Selection 20
1.3.6 Design Summary 21
1.4 Verification of System Performance 21
1.5 Hydraulic Line Sizing 27
1.6 Contamination Control 28
References 29
2 Mathematical Modeling of Flapper Nozzle Valve 30
2.1 Flapper Nozzle Valve Flow Analysis 30
2.2 Flow Forces 34
2.2.1 Flow Forces on Spool Valves 35
2.2.2 Flow Forces on Flapper Valves 38
2.3 Transfer Functions of Servo Valves 40
2.3.1 Transfer Function Between the Current and Flapper Rotation 42
2.3.2 Transfer Function Between Flapper Displacement and Spool Valve Displacement 44
References 48
3 Servo Valve Characteristic Curves 49
3.1 Flow Characteristic Curve 49
3.1.1 Bode Plot 53
4 System Identification 56
4.1 Modelling 56
4.2 System Identification in MATLAB 58
5 Results and Discussion 61
5.1 Grey Box Modelling 62
5.1.1 Test Case 1: Current Signal—Pseudo-Random Multiple Signal (PRMS) 62
5.1.2 Test Case 2: Current Signal—Chirp Signal 64
5.2 White Box Modeling 66
References 69
6 Conclusion 70
| Erscheint lt. Verlag | 1.9.2018 |
|---|---|
| Reihe/Serie | SpringerBriefs in Applied Sciences and Technology |
| Zusatzinfo | XIII, 63 p. 35 illus., 25 illus. in color. |
| Verlagsort | Singapore |
| Sprache | englisch |
| Themenwelt | Technik ► Elektrotechnik / Energietechnik |
| Technik ► Fahrzeugbau / Schiffbau | |
| Technik ► Maschinenbau | |
| Schlagworte | Actuation Test System • Electro-Hydraulic Actuation • Flapper Nozzle Valve • Mathematical Modeling • Servo Valve Testing • System design • System Identification |
| ISBN-10 | 981-13-2547-2 / 9811325472 |
| ISBN-13 | 978-981-13-2547-2 / 9789811325472 |
| Haben Sie eine Frage zum Produkt? |
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