Title page for ETD etd-11172012-040021
|Type of Document
||McGraw, Philip E.
||The oscillogenic control algorithm
||Master of Science
|Rony, Peter R.
|McGee, M. A.
|Date of Defense
An electronic-hardware-based oscillogenic controller
previously developed by P. K. Mercure was used as a model
for translation into a software—based control algoritnm.
The oscillogenic instrument, invented by P. R. Rony and P. K. Mercure, uses a feedback element (the oscillogenic controller) and a sensor component to produces a periodic
signal yielding information about the instrument's
sensor component. A control program that utilized the oscillogenic control algorithm was written in the Turbo Pascal programming language. An IBM PC with 640 kilobytes of read/write memory and with analog-to-digital and digital—to-analog converter boards running the control program performed as the controller component of an oscillogenic
instrument. A sample time of 0.5 seconds was used for this study. The instrument's sensor component consisted of a forced air thermal system with air flow rates ranging from 8.4 to 3l kg/hr. The oscillogenic instrument's frequency was, over the limited range tested (0.032 to 0.062 hz), a
linear indication of the thermal system's convective heat transfer coefficient, which varied from 230 to 400 W/m2-°C.
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