Anderson Wayne. Controlling Electrohydraulic Systems

New York: M. Dekker, 1988. — 385 p. — (Fluid Power and Control). — ISBN: 0-8247-7825-1.Providing an in-depth look at electrohydraulic components and systems, this informative guide covers everything from pump-motor operation and sizing with valves to portraying linear and nonlinear, analog and digital, electrohydraulic elements.
Taking into consideration energy and cost efficiencies for designers and systems users, Controlling Electrohydraulic Systems reviews control theory, with electrical and hydraulic examples... analyzes digital controllers, from definitions to closed-loop implementation... discusses the state space technique in modeling nonlinear systems... and contains computer programs with test results.
In addition to excellent appendixes describing the use of microprocessors as controllers and methods for obtaining classical, linear, and open- and closed-loop system performance, other topics treated concisely include pump, valve, and load parameters in pressure flow, velocity, and position control loops... servovalves in pressure and flow control configurations... and pilot-valve arrangements for proportional valves and servovalves.
Combining theory with practical applications, this single-source reference is essential reading for mechanical, fluid power and control, electrical and electronics, and chemical engineers; advanced undergraduate courses in control theory; and all others involved in the system integration of electronic and hydraulic components.Pump, Valves, and Output Drives
The Importance of Sizing
Hydraulic Basics
The Necessity of Controls
System Enhancement with the MicroprocessorThe power of pressure and flowPumping Mechanisms
Closed Circuits with Hydrostatic Transmissions
Open Circuits and the Orifice for Control
Closed Center
From Proportional Valves to Servovalves
Open-Center Valve
Pressure-Compensated Valve
Pressure Reducing Valves
Load Sensing
Sizing the Valve to Pump and LoadControl theory reviewLaplace Transform
Root Locus
Time Response
Frequency Response
Error Optimization
Digital ControlsThe control of pressure and flowNozzle-Flapper Pilot Valves
Multiple Stage Electrohydraulic Servovalves
Flow-Control Servovalves and Valve Design CriteriaControlling stability
Open-Loop Investigation
Velocity Feedback
PID
Pseudo-Integrator
Pseudo-Derivative Feedback
Lead-Lag
Frequency Response in the W-PlaneComplete systems under controlPressure-Relief-Valve Dynamics
Variable-Speed Control
Digital Electrohydraulic Systems
Nonlinear Analysis Through Modern Control TheoryAppendix. Computer Programs
Appendix. The Microprocessor in Closed-Loop Applications
Appendix. s-, t - , and Z Domain Properties and Equivalence
Appendix. Block-Diagram Reduction