Page 908 - Mechanical Engineers' Handbook (Volume 2)

900 Index

S Sensitivity, 4, 6, 118
Sensitivity analysis, 516–517
SA, see Successive approximation Sensors, 854–861
Sampled-data systems, 376 dynamic response of, 392
Sampling: force, 857–861
instrument statics, 9–10 position, 854–857
uniform, 377–378 Sequencing devices, 384
Sampling interval, data-acquisition, 211–
Sequential control, 682–686
213
Sequential function charts (SFCs), 683–
Sampling time, 425
686, 690, 691
Sampling without replacement (usual
Serial communications, 231
case), 9–10 Serial data transfer, 850–851
Sampling with replacement (random Series, impedances in, 39
sampling), 9–10 Series calibration, 97–99
Saturation, 663–665, 667, 668 Series compensation, 415, 416, 431–432
Saturation circuits, 498 Series manipulation, 92
Saturation nonlinearity, 371 Series sources, 44
Scatter (dispersion), 9
Service-induced inhomogeneity errors,
Scenario writing, 272
144–147
SCEPTRE, 500
Servos, 65–66
SCFM, see Standard cubic feet per
Servo accelerometers, 65–66
minute Servoactuators, 542–617. See also
S-domain, 190 Servomotors
S-domain compensators, 540 applications for, 543–545
S-domain pole locations, 523, 527–531 behaviors of, see Servoactuator
Second (time unit), 117 behaviors
Secondary physical variables, 303, 304 components of, 543, 544
Second central moment, 362 definition of, 543
Second-order lag, 625–627 electrical modulators, 569–574
Second-order lead compensators, 637, electromechanical/electrohydraulic
639–641 servosystems, 590–596
Second-order systems: hydraulic modulators, 582–592
integral control of, 402 mathematical models of, 544
PI control of, 403 stepper motors, 562–569
proportional control of, 401 Servoactuator behaviors, 596–617
step input response of, 472–474, 532, electrohydraulic, 604–606
534 electromechanical, 596–601
Second-order transfer function, 471–472, Servocompensators, 774, 775
474–477 Servomechanisms, 388
Second-order transient response, 334–335 Servomotors:
Selective perceptions, 281 alternating-current, 557–562
Self-fulfulling prophecies, desire for, 280 direct-current, 546–557
Self-generating responses, 106–111 electrical, 544, 546
Self-heating effect, 163–165 hydraulic, 394, 574–581
Self-heating error, 153–154 Servomultipliers, 494, 495
Self-validating thermocouples, 149, 150 Servosystem behaviors:
SEM (Society for Experimental electrohydraulic, 606–610
Mechanics), 81 electromechanical, 602–604
Semiconductor gages, 74–75, 90–91 hydraulic compensation, 610–616
Sense–plan-act cycle, 826 range of control, 616–617