INDEX 
Advanced z transform (see z transform) 
Approximation of continuous systems 
by sampled models, 283-301, 304— 
308 
estimation of errors, 293-295 
insertion of initial conditions, 304— 
308 
use of z forms, 295-301 
Auxiliary variable z, 53-54 
Boxcar data hold (see Zero-order data 
hold) 
Bypass digital controllers, 186-192 
design of, rules for, 189 
Cancellation of poles and zeros outside 
of unit circle, 156-157 
Cardinal data hold, 30-31 
Carrier modulation systems, 26—27 
Cascaded continuous elements, 87-90 
Chopper-bar galvanometer, 7 
Clamp circuit, 5, 34 
(See also Zero-order data hold) 
Closed-loop sampled-data systems, 
compensation of, 155-163 
rules and restrictions for, 158 
Compensation of sampled systems, 
feedback configuration, 155-163 
rules and restrictions, 158 
by use, of bypass digital con- 
trollers, 186-192 
of digital controllers, 147-148 
-, of pulsed networks, 136-143 
open-loop configuration, 153-155 
327 
Complex convolution, use of, to derive 
z transform, 54-55 
Continuous systems, approximation by 
sampled model, closed-loop, 290— 
295 
estimation of errors in, 292-295 
open-loop, 283-290 
with initial conditions, 304-308 
method of approximation by z forms, 
295-301 
with time-varying coefficients, 301— 
304 
Controller, digital (see Digital con- 
troller) 
Convolution summation, 66-67 
Data hold, 4, 23, 29-51, 287-288 
cardinal, 30-31 
first-order (see First-order data hold) 
higher-order, 42—43 
implementation of, 43-49 
polygonal, 287-288 
transfer function of, 288 
zero-order (see Zero-order data hold) 
Data links, 3 
Data reconstruction, 3, 29-51 
(See also Data hold; Extrapolation) 
Delayed z transform, 64-66 
Desampling filter (see Data hold) 
Digital controller, 6, 92, 145-197, 244— 
248 
bypass type, 186-192 
equivalent, 173-178 
implementation of, laboratory, 195- 
197 
