Train Test Platform Using Reflective Memory for Integration Testing
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Solution Overview
Problem
Current test platforms for railway trains are inefficient and error-prone in simulating the interactions between multiple car systems, leading to undetected interference and unexpected influences, especially in complex multi-vehicle units.
Innovation Solution
A train test platform with car units, a train communication system, a supervisor unit, and a reflective memory system that synchronizes memory tables across units, allowing real-time monitoring and manipulation of signals, and simulates non-present car systems to mimic their electrical behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual train systems are tested on separate test stands, then testing simplicity is maintained, but integration problems and interferences between components cannot be detected
Solution Approach 1:
The test platform is divided into multiple car units, each representing a real train car with its own systems and components. Each car unit can be independently configured and tested, allowing modular testing while maintaining integration capabilities. This segmentation enables comprehensive integration testing without requiring a complete real train assembly.
Solution Approach 2:
Multiple car units are combined in a single test platform to simulate a complete multi-car train. The car units are interconnected through a train communication system that replicates real train communication protocols, enabling detection of integration problems and interferences between components that would only manifest in a fully integrated system.
2Reliability
If all components are simulated in a test station, then integration testing is enabled, but the simulation process becomes tedious and time-consuming
Solution Approach 1:
Car units are pre-configured with real train systems and components before integration testing. The reflective memory system is pre-established to enable automatic real-time data exchange between car units, eliminating the need for manual simulation setup during testing. This preliminary configuration significantly reduces testing time while maintaining comprehensive integration testing capabilities.
Solution Approach 2:
The reflective memory system acts as an intermediary that automatically facilitates real-time data exchange between car units. Instead of manually simulating interactions between all components, the reflective memory system enables direct communication and data sharing, automating the integration testing process and reducing time consumption.
3Reliability
If simulated environments are used to test components, then early problem detection is possible, but unexpected influences and interferences cannot be revealed
Solution Approach 1:
The test platform uses real train systems and components with their actual electrical and communication parameters instead of simplified simulations. Car units are configured to match real train car specifications, enabling detection of unexpected behaviors and interferences that would not occur in idealized simulations. The system maintains early detection capabilities while accurately representing real-world conditions.
Data Source
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AI summary
A train test platform (101) for integration testing of actual train components of a multiple car railway train and a method to test such actual train components ahead of production of the first actual real train or without the need of an actual complete train is provided. The test platform (101) comprises a supervisor unit (119) and several car units (111 to 118) linked by a reflective memory system (137). The actual components to be tested are installed in instrumentation units of the respective car units (111 to 118). The instrumentation units provide break-out interfaces for connecting the actual train components to a train communication system (136) comprising the wiring, bus systems, power supplies etc. that are functionally identical to the communication system (136) in the actual train. Further the instrumentation units simulate those components not being present physically in the respective cars to provide the signals produced by theses components and to react on signals designated for these components. Testing is performed by monitoring and or manipulating signals at the break-out interfaces in real-time. All testing is controlled by the supervisor unit (119) using the reflective memory to exchange information with the platform components in the respective car units (111 to 118).