Construction Method of Student Model for Training Support System of Plant Operation

Abstract

The aim of this work is proposing a method to construct the knowledge model of a trainee for a training support system of plant operation. Following our previous study, trainee's knowledge is represented as two-layered model of task hierarchy and qualitative causality. A link between two nodes in this representation can be thought of as a unit of trainee's knowledge. Possessive states of these units are identified by inferencing trainee's intention and consistency maintenance. In intention inferencing, candidates of operation goal are enumerated from current state of the plant, operation procedures for each goal are generated using the trainee's knowledge model, and then the procedures are matched with operations that actually taken by the trainee. A prototype system of training support system was implemented on a workstation assuming a model plant consisting of a few tanks, valves and pipes. An experiment was performed using this prototype, where subject's intention inferred by the system was verified against subject's utterance. It was consequently shown that intention inferencing was appropriate in most cases, and that heuristics used for prioritizing candidates of intention did not heavily depend on subjects or experimental scenarios.