Method for obtaining optimized maintenance strategy of rail transit vehicle-mounted signal system

Abstract

The invention provides a method for obtaining an optimized maintenance strategy of a rail transit vehicle-mounted signal system. The method comprises the following steps: drawing a fault tree of the rail transit vehicle-mounted signal system, and carrying out quantitative analysis on the fault tree to obtain key importance of each unit in the fault tree; converting the fault tree into a Bayesian network, performing posterior probability reasoning on the Bayesian network, and determining the importance of each node by comprehensively referring to the key importance of each unit in the fault tree and the posterior probability of each node in the Bayesian network; and selecting each node with relatively high importance as a weak link of the system, establishing a state-based maintenance modelof an event corresponding to each node with relatively high importance, and obtaining an optimized maintenance strategy of the rail transit vehicle-mounted signal system according to the state-basedmaintenance model. According to the method, a reference basis for quickly positioning the fault equipment can be provided when the system has a fault, and the optimal maintenance time of the vehicle-mounted signal equipment can be speculated.

Description

technical field [0001] The invention relates to the technical field of rail transit maintenance, in particular to a method for obtaining an optimal maintenance strategy for a rail transit on-board signaling system. Background technique [0002] The rail transit signal system is a general term for the control technology to ensure traffic safety, improve the passing capacity of sections and stations, and the demarshalling ability of marshalling stations. It is responsible for the control of various driving equipment of rail transit and the transmission of driving information, and is an important part of rail transit information technology. Rail transit signal technology has experienced more than 100 years of development. It integrates computer technology, electronic information technology, modern communication technology and control technology to form the current modern rail transit signal system. It is the combination of these technologies in the field of rail transit. speci...

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Problems solved by technology

[0005] The disadvantages of the above method are: there are a large number of invalid faults in this method, such as false alarms, etc., and it is necessary to manually identify effective faults, and this method is not predictable, and it is impossible to guess the best maintenance time for the on-board signal equipment; in addition In actual operation, subway operating units generally carry out periodic maintenance in accordance with the maintenance regulations for on-board signal equipment, such as daily maintenance every two days, secondary maintenance every quarter, minor repairs every year, and medium repairs every six years, etc., but In actual operation, some on-board signal equipment have frequent faults, while others have low fault frequency

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