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I Process Control I
l)isc storage 1^'System IBM 1710*
Printer Air'.pei’'!
entro
Plotter
T
Card punch
C
Jape punch Rea time
Control­
Typewriter panel

Oolo logging
ns? 0

Ilynrimomvlur ?•••■!
Air stream panxrnpers
| program - cc>ntr<>ll«-<! [

Collector
Six-component-bulonce T'T
[fully outornalic 1

Big. 6 - Simplified diagram showing flow of information and function of the IBM 1710/1620 process control, system of
VW’s Climatic Wind Tunnel

operation, the control inputs for the control systems of me arc used for fully automatic process control with, the aid
individual units arc set by hand while the regulators auto­ of the digital-to-analog converter. com­
matical^ adjust the actual values of the process parameters puter also performs monitoring and was mg him-Con? !m
to the desired set points on an optimum basis. The use of means of ti cyclic comparison of preset threshold values
a computer also has made it possible to select the control of rite process p arameters with the .
inputs automatically in accordance, with predetermined data. (See 1'igs
programs. Accordingly, it is possible, for example, when
simulating typical operating conditions of city traffic to
SUMMARY
effect y i to. i iron i zed control of engine output, engine torque,
road speed, and air speed with the computer. J
Besides the central IBM 1620 digiral computer, the IBM Volkswagen's climatic wind tunnel which incorporates
1710 process control system contains among oilier Items the latest design rec'mi.ones can be used not only for m'H-
an analor-to-digital converter, a real time clock, and a ducting aerodynamic tests but als$ lor the development am'
digital-to-analog converter. The analog-to-digital con­ testing of vehicle units under co nd'Cons identic;-. • with Cm m
verter digitizes the input signals of the sensors and codes encountered on the road. The
them in the BCD code of the digital computer which then lation made it necessary to a consimm'
stores, converts, and'prints the coded data. The digital of automation into the testing programs and eve mm ion work
computer also takes preprogrammed logical decisions which in order to exploit this high capacity insfa’'cCon to the fall.
” ....

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Society of Automotive Engineers, Inc. 12 page booklet, rnTitv.4 ill p. S, A .