Study Of Temporary Speed Restriction Joint Control System

Safety is the eternal theme of train control and railway transportation. With the technology development on speed-raising of existing line and construction of passenger dedicated line, it demands higher requirement of railway system safety. Though Chinese safety control technology for rail transit has constant development, temporary speed restriction is the important content and difficulty of train control at present. Accidents which were made by temporary speed restriction losing control continued to happen. The disaster and influence caused by accidents was very serious. Therefore, it needs to do more in-depth study on existing temporary speed restriction control method and put forward more effective security temporary speed restriction control method.With the purpose of further improvement of temporary speed restriction control system safety, a new thought for safety guarantee of temporary speed restriction which is based on closed-Loop and joint control ideology was studied and proposed. Temporary speed restriction closed-Loop and joint control system was designed and joint control mechanism was embodied. Research is focus on the following:First, temporary speed restriction control methods was studied at home and abroad, and it dad an in-depth analysis and conclude the cause of "4.28"incident which was happened in last year. The temporary speed restriction control methods which were existed were described detailedly and given technology analysis and assessment in this article. The basic events of accident and accident modes which were in existing temporary speed restriction control method were educed by using fault tree method to analyze invalidation of temporary speed restriction.Second, a temporary speed restriction control method which had joint control ideology was put forward, the method was based on establishing temporary speed restriction closed-loop control and joint control model. With referencing the interlock thought, we constructed the specific rules of temporary speed restriction work joint control.Third, we designed temporary speed restriction joint control system through adding temporary speed restriction joint control database and radio based cab signaling system into TDCS system. We analyzed the operation demand of system, established the temporary speed restriction joint control database, and designed the data flow of joint control operation links. And the key technology of system implementing was also expatiated.Fourth, module which belonged to different departments of temporary speed restriction joint control system was carried out. Joint control mechanisms which were in the operation links of construction plan submitting, drafting commands, receipting commands and executing commands were achieved by joint control work information visually sharing. We constituted the safety emergency measures when executing was out of the way and the temporary speed restriction was paroxysmal. It reached the state of temporary speed restriction information closed-loop through the application of the radio communication technology and rules. The security of joint control work mode and reliability of temporary speed restriction joint control system were validated by mathematical model derivation and analyzed by fault tree method.At last, it obtained the conclusion that temporary speed restriction joint control system can effectively improve the security of temporary speed restriction control, and made a further prospect on related problems of temporary speed restriction joint control.