Application And Research Of Parallel Test Technology On CBTC System

Communication Based Train Control (CBTC) System has been used in real life, but it followed by higher requirement of the system including security and reliability. And one of the means to improve security and reliability is to test the system. In practical engineering applications, the main means to test CBTC system is by humans who executing the testing task one by one, which results in low testing efficiency.This article mainly deals with this problem by a new technology that is parallel test technology. It can test more than one under testing unit (UUT) in a single testing platform through parallel test. Thus, the total testing time is saved and the testing devices are taken plentifully used too. There are two problems in application of parallel test technology in CBTC system, and they are testing resource and testing objects. But current CBTC system platform doesn’t meet the conditions of parallel testing, so this article will reform the system platform. And then testing task of Vehicle On Board Controller (VOBC) and Zone Controller (ZC) subsystems are decomposed and reorganized. Then it meets the conditions of parallel test.Then, parallel test system is modeled which can describe parallel behavior. Since Timed Petri net has many good points, it is used to model parallel test model of CBTC system. Simulated Annealing Algorithm (GASA) is used to solve the problem of task priority and competition for resource.On this basis, Colored Petri Net (CPN) Tools and matlab are used to simulate and compute, and optimal parallel testing sequences are got. Apply it in system, and get execution path and total time, then verify the availability of parallel test technology using in CBTC system. At last the article shows research orientation of the next work.