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In this paper the Cognitive Simulation Model (COSIMO), currently implemented at the JRC-Ispra, is described, with particular emphasis on its theoretical foundations, on its computational implementation and on a number of simulations cases of man-machine system interactions. COSIMO runs on a Lisp machine and it interacts with the simulation of the physical system implemented on a Sun computer. The physical system is a typical nuclear power plant subsystem - the Auxiliary Feed-Water System (AFWS). The approach followed in the COSIMO simulation is to build a structure for the different kinds of cognitive activities performed by an operator in complex environments i.e. information seeking, pattern recognition, diagnosis and monitoring, planning and acting on the system in order to achieve production and ensure safety. In the present model the main tendency is towards an integrated simulation of the main cognitive activities of the operator in the same modelling environment. These cognitive activities have to be framed in a structure that offers features of flexibility and modularity, according to the overall state of the human and of the environment. A Blackboard Architecture is being developed to allow the interaction of several sources of knowledge and mechanisms for the simulation of the decision making process. This paper describes the global architecture of COSIMO, which is defined in three parts: (1) the structural description of its main components; (2) the functional description of each component; (3) the computational envelope of the Blackboard Architecture with its own structure. Several cases of deviations of human operator problem solving are analysed in the framework provided by COSIMO interacting with the AFWS simulation.

Additional information

Authors: CACCIABUE P C ET AL., JRC Ispra (IT)
Bibliographic Reference: EUR 13805 EN (1992) 38 pp., MF, ECU 4, blow-up copy ECU 6
Availability: (2)
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