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The fault diagnosis and analysis of high-speed train is of great significance for train's safe and highly efficient operation. The complexity and quantity of on-train information which is closely related with fault diagnosis and analysis is increasing rapidly as the development of high-speed railway. Onboard system fault recording files contains lots of important fault information described in short-text...
T rain-ground communication subsystem is a key subsystem in high-speed train control system and plays an important role during the operation of high-speed train. So the reliability of train-ground communication subsystem should be studied in depth. The dynamic fault tree model for train-ground communication subsystem that is modeled based on the structure chart of the subsystem is transformed to Dynamic...
Due to the poor environment in the West of China, this research firstly analyzes the application requirements of low density, low cost and high reliability, and then focuses on the integrated BeiDou Navigation Satellite System (BDS) and Inertial Navigation System (INS) to achieve seamless positioning. The map-matching technology in the switch section is studied and its process is discussed and tested,...
System Testing is a key technology of CVIS (Cooperative Vehicle Infrastructure System). A shortest test sequence generating approach in CVIS is proposed in this paper. The paper firstly analyzes the spatial-temporal state of vehicle and complexity of infrastructure in network. Then paper designs system features and test cases, and introduces the concept of support index of the test case to system...
Cooperative Intersection Collision Avoidance System (CICAS) program uses roadside radar sensors, a computer processor and algorithms to determine unsafe conditions, and an active LED icon based sign to provide timely alerts and warnings which are designed to reduce the frequency of crashes at rural expressway intersections. The cooperative component of the CICAS system consists of roadside equipment...
Vehicle autonomous navigation is crucial for the implementation of vehicle infrastructure integration, which is a prospective trend of intelligent transportation systems. The integration of multiple on-board sensors and even the support from V2V and V2I communication are critical to maximize each of their benefits. This paper discusses the concept of multi-sensor based vehicle autonomous navigation...
Based on basic theory and methods of fault injection, the software-based fault injection was constructed for distributed and inter-operated simulation architecture based on High Level Architecture (HLA). The fault test program of communication in train control simulation system was designed. The fault injection tools were used to control train control model. Every module in train control model should...
Train locating information is very important for train control system, how to achieve automatic identification of train track occupancy using GNSS simply in some railway sections without track circuits has been a crucial problem. Hausdorff distance can be used to measure the mismatch between two sets, which is widely used in object matching. This paper presents a novel algorithm for automatic identification...
This paper studies Multi-Resolution Modeling (MRM) method of Train Control System based on multi resolution modeling (MRM) and analyses in detail about aggregation-disaggregation theory as well as consistency of MRM. Due to the characteristics of Train Control System as being multi-node and distributed, subsystems of Train Control System using different resolution modeling methods concerning hierarchy...
With the rapid development of the intelligence and complication to railway systems, there are increasing demands of electromagnetic compatibility performance for train borne system, where the electromagnetic compatibility performance of train positioning system (TPS) is crucial to the design process of the entire system. In this paper, the system architecture of TPS integrating multi sensors is introduced,...
High-speed train control system is one complex security system with lots of functions, which means that it is necessary to build up high-speed train control system simulation & testing integration platform to start function and system verification and validation (V&V). In this paper, key techniques of high-speed train control system simulation & testing integration platform are studied;...
Train Location information is important for train control system. As for the train locating using GNSS technology, validation of location data is important. The railway yard has to be traversed several times in data validation process. Computer simulation technology is used to simulate yard-traversing repeatedly for some difficult situations. A new optimal continuous traversal algorithm is proposed...
With high accuracy and storage efficiency, digital track map plays an important role in train positioning system as a special sensor, and directly affects the safety of the train operation control. In this paper, the characteristics of the track are analyzed with practical measurements, a distance discrimination is utilized to reject abnormal data, and a vertical distance criterion and cubic spline...
Basic principle, composition and classification of European Train Control System (ETCS) are introduced. Train Traction model and Brake model of ETCS controlling Curves are studied, which includes increasing and decreasing curve model. At last, the application and development of ETCS in high-speed railway are introduced, which could be as reference of Chinese train control system controlling curves...
As we known, how to describe rail track with precise data is one important problem in train positioning research fields, research of variational curve model base on Level Set and GVF (Gradient Vector Flow) was studied systematically and the GPS data reduction model, method and algorithm base on variational curve model in limited restriction condition was studied, combine with real track data, analyzed...
Under the development of high technology, GPS software receiver has been more and more highly developed, thus becoming the hot issue in the GPS receiver research field. This paper demonstrates GPS software receiver using IF signal from the NewStar210A IF signal sampler as the raw data, then using Matlab as the software for signal acquisition and tracking. The navigation data, pseudo range, carrier...
Vehicles detection base on the magnetic effect is a major hot spot in the field of vehicles detection. This paper has studied and realized a wireless magneto-resistive sensor based vehicles detection system, and improved the vehicle detection algorithm. The thesis has used a testing algorithm based on iterative optimal wavelet threshold used to focus on testing whether vehicles passing by. For the...
Because of complexity of CTCS-3 train control system, interworking testing and function evaluation could not be operated directly on the system, which means that deep research on modeling and simulation of train operation control system should be carried out. This paper proposes a modeling and verification method based on UML and colored Petri net. On the basis of analysis of advantages and disadvantages...
This paper mainly focuses on a GNSS IF signal acquisition platform; the platform is comprised of RF module, control module, buffer module, transmission module and a data acquisition routine. RF module is designed as a single-circuit board to facilitate for replacement, GNSS signal is converted to IF digital signal by filtering, amplifying, down conversion and sampling in the RF module; Programmable...
Research of variational curve model in limited restriction condition and application in rail train control track database was studied in this paper, raised the method, model and algorithm for digital track map auto-generation from GPS track data, through lots of testify, comparison and improvement using practical data between those algorithm and method, aim at track data, construct mathematical model...
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