ISBN-10:
0137163592
ISBN-13:
9780137163595
Pub. Date:
12/06/1999
Publisher:
Pearson Education
Electrohydraulic Control Systems / Edition 1

Electrohydraulic Control Systems / Edition 1

by F. Don Norvelle

Hardcover

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Product Details

ISBN-13: 9780137163595
Publisher: Pearson Education
Publication date: 12/06/1999
Pages: 285
Product dimensions: 7.71(w) x 9.58(h) x 0.80(d)

Table of Contents

Preface ix
An Introduction to the Real World
1(6)
Introduction
1(1)
Applications
2(2)
The Future
4(3)
A Review of Basic Fluid Power
7(17)
Introduction
7(1)
Fluid Power Concepts
8(9)
Flow--Speed Relationship
9(1)
Pressure--Force Relationship
10(3)
Horsepower Calculations
13(4)
Fluid Power Symbols
17(4)
Rules of Symbol Usage
17(1)
The Language of Graphic Symbols
17(2)
Circuit Diagrams
19(2)
Summary
21(3)
Suggested Additional Reading
21(1)
Review Problems
22(2)
A Review of Basic Electricity
24(23)
Introduction
24(1)
Basic Electrical Concepts
24(4)
Resistance
25(1)
Power
26(1)
Alternating Current Calculations
27(1)
Symbols for Common Electrical Sensors and Switches
28(10)
Switches
29(5)
Sensors
34(4)
Electrical Circuit Diagrams
38(6)
General Rules for Electrical Ladder Diagrams
39(1)
Drawing Electrical Ladder Diagrams
40(2)
Relating Wiring Diagrams to Electrical Ladder Diagrams
42(2)
Connecting a Circuit from a Ladder Diagram
44(1)
Summary
44(3)
Review Problems
45(2)
Solenoid Valves
47(44)
Introduction
47(1)
Solenoid Valve Construction
48(11)
Valve Section
49(1)
Solenoid
50(5)
Electrical Ratings for Solenoids
55(2)
Transient Suppression
57(1)
Wet-Armature Solenoid
58(1)
The Solenoid Valve
59(2)
Solenoid Valve Configurations
61(3)
Pilot-Operated Solenoid Valves
64(5)
Valve Shifting Time
69(6)
Pilot Spool
69(3)
Main Spool
72(3)
Valve Mounting
75(3)
Transducers for Solenoid Systems
78(1)
Typical Solenoid Circuits
78(7)
Solenoid Valve Maintenance and Troubleshooting
85(3)
Summary
88(3)
Review Problems
88(1)
References
89(1)
Suggested Additional Reading
90(1)
Electrohydraulic Proportional Control Valve
91(28)
Introduction
91(2)
Defining Proportional Control Valves
93(2)
Directional Control EHPVs
95(5)
Proportional Solenoids
95(3)
Valve Hardware
98(2)
Throttle (Flow Control) EHPV
100(2)
Pressure Control EHPV
102(2)
Electronic Controls
104(10)
Force Control versus Position Control
105(2)
Electronics
107(7)
Combining Speed and Directional Control
114(1)
Summary
115(4)
Review Questions
115(3)
Suggested Additional Reading
118(1)
Servovalves
119(40)
Introduction
119(1)
Definition of a Servovalve
120(3)
History of Electrohydraulic Servomechanisms
120(2)
Electrohydraulic Servomechanism Concepts
122(1)
Servovalves
123(18)
Torque Motors
123(5)
Valve Spools
128(2)
Valve configurations
130(4)
Pressure-Flow Characteristics
134(4)
Valve Performance
138(3)
Electronics
141(10)
Amplifiers
142(2)
Operational Amplifier
144(7)
Servopumps and -Motors
151(2)
System Design Consideration
153(4)
Summary
157(2)
References
157(1)
Review Problems
157(2)
Electrohydraulic Control System Concepts
159(32)
Introduction
159(1)
Rapid Cycling
160(14)
Phase Lag
160(2)
Amplitude Response
162(1)
Step Response
163(1)
Circuit
164(1)
Natural Frequency (Cylinder Circuit)
164(7)
Natural Frequency (Hydraulic Motor Circuit)
171(3)
Gain and Feedback
174(13)
The Control Radio Equation
174(3)
Multiple Feedback Systems
177(2)
A System Example
179(5)
Gain Adjustments
184(2)
Repeatable Error
186(1)
Tracking Error
186(1)
Velocity Control Systems
187(1)
Summary
187(4)
Suggested Additional Reading
188(1)
Review Problems
188(3)
Sensors
191(40)
Introduction
191(1)
Transducers versus Sensors
191(1)
Signal Conditioning
192(1)
Sensor Characteristics
193(2)
Accuracy
194(1)
Precision
194(1)
Discrete Sensors and Transducers
195(15)
Limit Switches
195(13)
Pressure Switches
208(2)
Other Discrete Elements
210(1)
Timers and Counters
210(1)
Continuous Sensors
210(18)
Temperature Sensors
210(4)
Flow Rate Measurement
214(2)
Pressure Measurement
216(4)
Linear Position
220(4)
Rotary Position Measurement
224(3)
Velocity and Acceleration Measurement
227(1)
Summary
228(3)
Suggested Additional Reading
229(1)
References
229(1)
Review Questions
229(2)
Programmable Logic Controllers
231(23)
Introduction
231(3)
Background
234(1)
PLC Architecture
235(8)
Central Processing Unit
235(1)
Memory
235(2)
Input/Output Modules
237(3)
Programming Devices
240(2)
PLC Sizes
242(1)
Programming Languages
243(1)
The Transition: Relay Logic to PC Logic
244(1)
Application Examples
245(7)
Summary
252(2)
References
252(1)
Review Questions
253(1)
Robotics
254(20)
Introduction
254(1)
Robotic Devices
255(2)
Manipulators
257(3)
Cartesian Geometry
257(1)
Polar Coordinates
257(1)
Cylindrical Coordinates
257(1)
Anthropomorphic
257(2)
SCARA
259(1)
Other Configurations
259(1)
End Effectors
260(5)
Power Systems
265(1)
Control
266(2)
Programming
268(1)
Safety
269(3)
Installation Considerations
272(1)
Summary
272(2)
Suggested Additional Reading
273(1)
Review Questions
273(1)
Appendix A Common Fluid Power Symbols 274(3)
Appendix B Common Electrical Symbols 277(4)
Index 281

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