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. / Master of Science
| Identifer | oai:union.ndltd.org:VTETD/oai:vtechworks.lib.vt.edu:10919/45770 |
| Date | 17 November 2012 |
| Creators | McGraw, Philip E. |
| Contributors | Chemical Engineering, Rony, Peter R., Konrad, Kenneth, McGee, M. A. |
| Publisher | Virginia Tech |
| Source Sets | Virginia Tech Theses and Dissertation |
| Detected Language | English |
| Type | Thesis, Text |
| Format | vii, 471 leaves, BTD, application/pdf, application/pdf |
| Rights | In Copyright, http://rightsstatements.org/vocab/InC/1.0/ |
| Relation | OCLC# 24344535, LD5655.V855_1987.M447.pdf |
Page generated in 0.0023 seconds