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Hydraulic and Electro-Hydraulic Control Systems - R. B. Walters

Hydraulic and Electro-Hydraulic Control Systems

Hardcover

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Covers control systems that employ proportional control elements e.g. proportional control valves and hydrostatic transmissions, and gives extensive treatment to system modelling including algorithms for computer-based analysis.

1 Introduction.- 2 Hydraulic Power Source.- 3 Working Pressures.- 4 Hydraulic Actuators.- 5 Control Elements.- 5.1 Pressure Controls.- 5.2 Flow Controls.- 6 Data Transmission Elements.- 7 The Control System.- 7.1 The Controller.- 7.2 The Closed Loop Option.- 8 Control Concepts.- 8.1 Definition of Terms.- 8.1.1 Stability.- 8.1.2 Transfer Function.- 8.1.3 Steady-State Gain.- 8.1.4 Loop Gain.- 8.1.5 Frequency Response.- 8.1.6 Stability Criteria.- 9 Principles of Flow Control for Valve-Operated Systems: Part 1.- 10 Principles of Flow Control for Valve-Operated Systems: Part 2.- 10.1 Effect of Quiescent Leakage on Linearity.- 11 Introduction to System Analysis.- 12 System Analysis of Electro-hydraulic Control System.- 13 Modular Optimized System Simulation.- 14 System Analysis in the Time Domain.- 15 Transient Response Characteristics.- 16 Further Case Studies.- 16.1 Third Order System with Flow Feedback.- 16.2 Fourth Order Hydrostatic Transmission.- 16.3 Fifth Order System.- 16.4 Seventh Order System with Flow Feedback.- 17 Non-symmetrical Systems.- 17.1 Oil Compliance.- 17.2 Cavitation Effects of Overrunning Loads.- 17.3 Worked Example.- 18 Response to Large Step Demand.- 19 Valve Operating Forces.- 19.1 Spool Valves.- 19.2 Flapper-Nozzle Valves.- 19.3 Poppet Valves.- 20 The Electronic Interface.- 21 System Enhancement.- 21.1 Input Shaping.- 21.1.1 Ramp-Step Demand.- 21.1.2 Negative Ramping.- 21.1.3 Superimposed Negative Impulse..- 21.2 Passive Networks.- 21.3 Adaptive Control.- 21.4 Multiple Feedback.- 21.5 Three-Term Controller.- 21.6 Performance Summary.- 22 Analysis of Pressure Control System.- 23 Efficiencies and Power Dissipation.- 24 Elastically Mounted Mass Systems.- 25 The Flow Feedback Option.- 26 Non-linearities.- 27 Steady-State System Analysis.- 27.1 Velocity Error.- 27.2 Hysteresis Error.- 27.3 Load Error.- 27.4 Conclusions.- 28 Applications.- 29 National and International Standards.

ISBN: 9781851665563
ISBN-10: 1851665560
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 268
Publisher: SPRINGER VERLAG GMBH
Country of Publication: NL
Dimensions (cm): 24.33 x 16.56  x 1.98
Weight (kg): 0.54