The Research On Cognition Modelling And Evaluation For Emergency Decision Of Operating Control Center In Fully Automatic Operation (FAO) System

The Fully Automatic Operation System(FAO)is a control system replacing the train's driver and dispatcher by the automatic and intelligent equipment,and it's an important solution to improve the safety,energy saving,efficiency and flexibility of the urban metro transportation with high speed and high density.With the changes of the system functions and structure after the replacement of the driver,the system functions of the Operating Control Center(OCC)and duties of relevant personnel will change accordingly,which increases the complexity of the FAO^ decision-making under the emergency and brings a lot of risk into the emergency operation process.Therefore,there's a strong requirement to study the emergency decision-making of the FAO for further directing operation personnel how to make valid judgment and reasonable emergency decision,and making sure the safe operation under the FAO.The major research contents are as follows:Based on the line Yanfang project of Beijing subway,the thorough emergency requirements were analysed firstly.The analysis started with the emergency tasks of the train driver and the structure of operation organization under the FAO.The relevant changes of emergency requirements were proposed in terms of the operation mode,organization structure and variation of personnel duties as a result.According to the characteristics of the FAO,the system emergency situations were classified and the specific operation mode of the line Yanfang were taken into account.Therefore,the potential dangers of emergencies can be eliminated and the operational safety can be assured.The evaluation method for the complexity of the emergency procedures based on the graph entropy theory was proposed in this paper.The distinctions of the complexity of emergency decision making between the FAO and the traditional train operation control system were illustrated with the real case,which provided a theoretical basis for the analysis on the emergency decision-making of the FAO.Considering that the cognitive learning process for the decision-making of the dispatcher in OCC happened with the implementation process for the emergency making-decision,the emergency tasks of the control center were classified in order to study the cognitive mechanism of the emergency decision-making and implementation.Based on the ACT-R theory,thirteen general productive rules of the dispatchers in OCC were presented and the cognitive model for the emergency decision-making of the dispatcher was established.For the further analysis of the cognitive mechanism and the effect on the emergency response performance during the implementation process of the emergency strategies,the chunk FAN value analysis method was proposed for the FAO by studying the activation degree theory based on the ACT-R theory and the learning decision selection mechanism based on the utility theory.In order to validate the influence of the FAN value on the performance of emergency decision-making,the cognitive experiment in terms of the features of the emergency decision-making for the dispatchers of line Yanfang was designed based on the established GUI object environment,and the dependencies between the cognitive factors and the emergency response performance were identified.The emergency performance under different GOAs has dependence with both FAN value and cognitive pattern.Also,the migrationprocess of GOAs,organization and emergency procedures have effects on emergency performance.Considering that ambiguities and uncertainties generally exist in emergency alternatives' judgment by dispathcers in OCC,a hybrid emergency decision-making method integrating fuzzy analytic hierarchy process(FAHP)was presented.When evaluating the importance of dispatcher in OCC9 the proposed formulation process considered task interdependencies featured by the structure of the corresponding emergency task model.Through integrating the FAHP method with the enhanced WOWA? the priority of emergency alternatives was obtained to support the complex emergency response procedure in FAO.