NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Integrating causal reasoning at different levels of abstractionIn this paper, a problem-solving system which uses a multilevel causal model of its domain is described. The system functions in the role of a pilot's assistant in the domain of commercial air transport emergencies. The model represents causal relationships among the aircraft subsystems, the effectors (engines, control surfaces), the forces that act on an aircraft in flight (thrust, lift), and the aircraft's flight profile (speed, altitude, etc.). The causal relationships are represented at three levels of abstraction: Boolean, qualitative, and quantitative, and reasoning about causes and effects can take place at each of these levels. Since processing at each level has different characteristics with respect to speed, the type of data required, and the specificity of the results, the problem-solving system can adapt to a wide variety of situations. The system is currently being implemented in the KEE(TM) development environment on a Symbolics Lisp machine.
Document ID
19890040238
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hudlicka, Eva
(Bolt, Beranek, and Newman, Inc. Cambridge, MA, United States)
Corker, Kevin
(BBN Laboratories, Inc. Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Systems Analysis
Meeting Information
Meeting: International Conference on Industrial and Engineering Applications of Artificial Intelligence and Expert Systems
Location: Tullahoma, TN
Country: United States
Start Date: June 1, 1988
End Date: June 3, 1988
Accession Number
89A27609
Funding Number(s)
CONTRACT_GRANT: NAS1-17335
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available