Research On The Method Of Quantifying The Complexity Of Emergency Dispatching Plan For High-speed Railway

The running safety of high-speed railway trains is particularly important because of its fast running speed and small departure interval.To deal with the emergency situation in operation,the dispatching station has worked out a plan to deal with the abnormal operation of high-speed railway,so as to ensure the standardization of train dispatchers’ traffic command.In the operation of the dispatching station,the accuracy and timeliness of the dispatcher executing the emergency dispatching plan is very important,once the operation error or timeout will bring huge losses,and a complex plan will increase the number of human errors of dispatchers,which will affect the safety and effectiveness of traffic command.Previous studies have found that reducing the complexity of operation procedures can effectively reduce the probability of human error,but there is still a lack of an objective method to quantify the complexity of high-speed railway emergency dispatching plans.Therefore,this paper proposes an objective quantitative method which is suitable for the complexity evaluation of high-speed railway emergency dispatching plan,and carries on the experimental verification.Firstly,the paper analyzed and reviewed the research status of complexity in various fields at home and abroad,distinguished the definition of complexity and workload,and put forward the concept of complexity of emergency dispatching plan for high-speed railway.Then,the paper introduced some basic concepts and principles of graphic entropy and VACP model respectively,in order to study the quantitative method of the complexity of emergency dispatching plan for high-speed railway.After that,on the basis of the analysis of dispatching tasks and subjective questionnaire survey,it is comprehensively determined that the dispatching plan logic complexity(DPLC)and the dispatching plan cognitive complexity(DPCC)are the main metrics.DPLC reflects the external and macro complexity of dispatching plan,and DPLC reflects the internal and micro complexity of dispatching plan.Then,a complexity measurement model-DPC and its application flow are proposed.After that,an example of artificially triggered departure route plan operation is analyzed by using DPC method,and the complexity difference of plan with or without interaction is analyzed.It is found that the existence of interaction between dispatchers greatly increases the complexity of the operation,and often the part of the plan undertaken by assistant dispatchers is more complex.On this basis,the paper also gave some suggestions to reduce the complexity of the plan.Finally,the effectiveness of the method is verified with the help of high-speed railway dispatching simulation platform,the results show that the correlation coefficients between the value of the DPC method and the average execution time of the plan and the NASA-TLX score are 0.819 and 0.930 respectively,and the value can describe the complexity of the plan.