Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-01-27T15:35:07.567Z Has data issue: false hasContentIssue false
  • English
  • Français

Automatic Control to Prevent Thermal Runaway During Microwave Joining of Ceramics

Published online by Cambridge University Press:  25 February 2011

Guy O. Beale  and
Francisco J. Arteaga
Guy O. Beale
Affiliation:
Department of Electrical and Computer Engineering, George Mason University, Fairfax, VA 22030
Francisco J. Arteaga
Affiliation:
Department of Electrical and Computer Engineering, George Mason University, Fairfax, VA 22030
Get access

Abstract

A temperature control system is designed and simulated for microwave joining of ceramics. The objective is to develop a control system for reliable, high quality joints to be produced on a variety of ceramics. The described procedure permits the derivation of a closed-loop configuration for controlling temperature. The ceramics (alumina) heating model equation is linearized around an operating point and represented as a transfer function. Conditions for closed-loop stability with any linearized model are presented and mathematically proven. A computer simulation is implemented for the closed-loop control and numerical integration is used for solving the non-linear heating equations. Results are very good and show that the temperature can be regulated to a set point value and thermal runaway in the ceramics can be prevented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 269: Symposium L – Microwave Processing of Materials III , 1992 , 265
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Schwartz, M. M., Ceramic Joining, ASM International, Materials Park, OH, 1990.Google Scholar
2. Sutton, W. H., Amer. Ceram. Soc. Bull., vol. 68, no. 2, p.376, 1989.Google Scholar
3. Palaith, D., Silberglitt, R., Wu, C. C. M., Kleiner, R., and Libelo, E. L., Mat. Res. Soc. Symp. Proc. vol. 124, p.255, 1988.Google Scholar
4. Palaith, D. and Silberglitt, R., Amer. Ceram. Soc. Bull., vol. 68, no. 9, p.1601, 1989.Google Scholar
5. Fukushima, H., Yamanaka, T., and Matsui, M., J. Mater. Res., vol. 6, no. 2, p.397, 1990.Google Scholar
6. Yu, X. D., Varandan, V. V., Varandan, V. K., and Ghodgaonkar, D., Ceramic Transactions, The American Ceramic Society, vol. 21, pp. 251–259, 1991.Google Scholar
7. Yu, X. D., Varandan, V. V., Varandan, V. K., Ceramic Transactions, The American Ceramic Society, vol. 21, pp. 497–505, 1991.Google Scholar
8. Tian, Yong-Lai, Ceramics Transactions, The American Ceramic Society, vol. 21, pp. 283–300, 1991.Google Scholar
9. Holman, J. P., Heat Transfer. New York, McGraw-Hill, 1972.Google Scholar
10.Guy Beale, O., Francisco Arteaga, J., and Black, W. Murray, to be published in IEEE Transactions on Industrial Electronics.Google Scholar
11. Jackson, J. D., Classical Electrodynamics, New York, Wiley, 1962.Google Scholar
12. Collins, R. E., Foundations for Microwave Engineering, New York, McGraw-Hill, 1966.Google Scholar
13. D'Azzo, John J. and Houpis, C. H.. Linear Control System Analysis and Design, New York, McGraw-Hill, 1988.Google Scholar
14. Thaler, G., Automatic Control Systems, St.Paul, MN, West Publishing, 1989.Google Scholar