Page 892 - Mechanical Engineers' Handbook (Volume 2)

884 Index

Direct digital control (DDC), 446, 447 Dry motors, 584
Direct NN control, 795 DSPs (digital signal processors), 434
Discharge coefficient, 52n. D-statistic, 28
Discrete-event digital simulation models, D-type element, 306, 307
276 Duals (term), 314
Discrete-time systems, 376–381 Dual heuristic programming (DHP), 816
canonical forms for, 731–739 Dualogs, 314
difference equations, 376–377 Dword (double word), 844
LQR problem, 764–766 Dynamical systems, 792
NN control for, 800 Dynamic calibration, 95–96
observer-based controller for LTI, 785 Dynamic characteristics, 4
observer for LTV, 778 Dynamic flowmeters, 176
pulse transfer functions, 379 Dynamic focusing of awareness, 810
state-space equations for, 718–720 Dynamic instruments, 63–65
system equations solutions for, 741–743 Dynamic inversion neurocontroller, 805–
uniform sampling, 377–378 806
zero-order hold, 379–381 Dynamic model, 560, 561
z-transform, 378–380 Dynamic pressure feedback (DPF)
Discrete transfer functions, 379 servovalves, 612, 614–616
Dispersion (scatter), 9 Dynamic RAM (DRAM), 250
Displacement transducers, 389, 390 Dynamic response:
Dissipation constant, 164 for electrohydraulic servosystems, 614–
Dissipative load characteristics, 45 616
Distributed numerical control (DNC), of servomechanisms, 625–635
697–698 Dynamic response of sensors, 392
Distributed-parameter models, 364–365
Distributed systems, 66–67, 230
Distribution function, 362 E
Distributions comparison, 29–31 ECCs (execution control charts), 683
Disturbance accommodation, 768–770 Econometrics, 276
Disturbance input, 388, 761–763 E-core, 113
Disturbance rejection, 384 Eddy current inductive displacement-
Disturbance transfer function, 388 measuring systems, 113
Division of voltages, 495, 496 EEPROM (electronically erasable PROM),
DNC, see Distributed numerical control 250
Dominant poles, 335, 337 Efficacy evaluation, 295–296
Doppler meters, 183–184 Efficiency, 102
Double word (dword), 845 Effort factor, 37, 38
DPF servovalves, see Dynamic pressure Effort sources, 40, 44
feedback servovalves Effort variable, 119
Drag-cup ac servomotors, 557–559 Eigenstructure, 350–352
DRAM (dynamic RAM), 250 Eigenvalues, 350–352
DRIE (deep reactive ion etching), 866 Eigenvectors, 350–352
Drift (stability), 102 Elastic structure, idealized, 121
RTD, 158 Electrical impedance, 38
thermistor, 162 Electrical modulators, 569–574
Drives, see Stepper motor modulators dc-motor, 569–573
Driving point, 33 stepper-motor, 573–574
Driving-point stiffness, 51–52 Electrical servomotors, 544, 546
Dry friction, 66n. Electro-Craft, 550n.