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Waltz, David L. Rajagopalan, Raman Meenakshisundaram 2021-10-22T17:40:13Z 2021-10-22T17:40:13Z 1981 Mechanism modeling is currently a very active area of Artificial Intelligence. Several theories of mechanism modeling have resulted from this work and have been applied to such tasks as simulation, analysis, and troubleshooting in domains such as electronic circuit analysis and steam plant operation. This thesis addresses some of the issues involved in modeling the domain of turbojet aircraft engine operation. A causal model of the turbojet engine, based on the kinds of relationships which exist between engine parameters, is described. The utility and limitations of currently accepted theories of mechanism modeling for modeling the operation of the turbojet engine are also discussed, along with suggestions for overcoming some of the limitations. Finally, the applications for qualitative models of the turbojet engine are explored. The current causal model has been implemented in INTERLISP-VAX on a Vax 11/780 for the purposes of simulation and analysis, along with a facility for explaining the results of such a simulation. Open Restriction set for Item 119634 on 2021-10-22T17:34:34Z with date null by eliasbh2@illinois.edu. Submitted by Eli Hubbard (eliasbh2@illinois.edu) on 2021-10-22T17:40:13Z No. of bitstreams: 1 9979932612205899.pdf: 29602343 bytes, checksum: 92a3785ac53ab11c40805cfc6e6c73f6 (MD5) Made available in DSpace on 2021-10-22T17:40:13Z (GMT). No. of bitstreams: 1 9979932612205899.pdf: 29602343 bytes, checksum: 92a3785ac53ab11c40805cfc6e6c73f6 (MD5) Previous issue date: 1981 Open http://hdl.handle.net/2142/111759 en Modeling Electrical engineering Qualitative modeling in the turbojet engine domain dissertation/thesis text Department of Electrical Engineering Electrical engineering University of Illinois at Urbana-Champaign Thesis M.S. (master's) Master of Science