Title page for ETD etd-11172012-040021


Type of Document Master's Thesis
Author McGraw, Philip E.
URN etd-11172012-040021
Title The oscillogenic control algorithm
Degree Master of Science
Department Chemical Engineering
Advisory Committee
Advisor Name Title
Rony, Peter R. Committee Chair
Konrad, Kenneth Committee Member
McGee, M. A. Committee Member
Keywords
  • Programmable controllers
Date of Defense 1987-08-15
Availability restricted
Abstract

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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