Page 551 - Mechanical Engineers' Handbook (Volume 2)

Mechanical Engineers’ Handbook: Instrumentation, Systems, Controls, and MEMS, Volume 2, Third Edition.
Edited by Myer Kutz

Copyright  2006 by John Wiley & Sons, Inc.

CHAPTER 14
SERVOACTUATORS FOR
CLOSED-LOOP CONTROL
Karl N. Reid
College of Engineering, Architecture and Technology
Oklahoma State University
Stillwater, Oklahoma
Syed Hamid
Halliburton Services
Duncan, Oklahoma
1 INTRODUCTION 543 8.2 Mathematical Model of a
1.1 Definitions 543 Spool-Type Valve 584
1.2 Applications 543 8.3 Mathematical Models for an
1.3 Mathematical Models 544 Electrohydraulic Servovalve 588
2 ELECTRICAL SERVOMOTORS 544 9 ELECTROMECHANICAL AND
ELECTROHYDRAULIC
3 DIRECT-CURRENT SERVOSYSTEMS 590
SERVOMOTORS 546 9.1 Typical Configurations of
3.1 Brushed dc Servomotors 546 Electromechanical Servosystems 590
3.2 Brushless dc Servomotors 552 9.2 Typical Configurations of
Electrohydraulic Servosystems 590
4 ALTERNATING-CURRENT 9.3 Comparison of
SERVOMOTORS 557 Electromechanical and
4.1 Types of ac servomotors 557 Electrohydraulic Servosystems 592
4.2 Mathematical Model 559
10 STEADY-STATE AND
5 STEPPER MOTORS 562 DYNAMIC BEHAVIOR OF
5.1 Operation 563 SERVOACTUATORS AND
5.2 Types of Stepper Motors 564 SERVOSYSTEMS 596
5.3 Mathematical Model of a 10.1 Electromechanical
Permanent-Magnet Stepper Servoactuators 596
Motor 567 10.2 Electromechanical
5.4 Numerical Example 567 Servosystems 602
10.3 Electrohydraulic
6 ELECTRICAL MODULATORS 569 Servoactuators 604
6.1 Direct-Current Motor 10.4 Electrohydraulic Servosystems 606
Modulators 569 10.5 Hydraulic Compensation 610
6.2 Stepper Motor Modulators 573 10.6 Range of Control for
Electrodydraulic and
7 HYDRAULIC SERVOMOTORS 574 Electromechanical
7.1 Linear-Motion Servomotors 574 Servosystems 616
7.2 Rotary-Motion Servomotors 575
7.3 Mathemtical Models 576 REFERENCES 617
8 HYDRAULIC MODULATORS 582 BIBLIOGRAPHY 618
8.1 Servovalve Design and
Operation 582

Reprinted from Instrumentation and Control, Wiley, New York, 1990 by permission of the publisher.
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