Evaluation of a "web-based" vehicle network for system tests
Validation of ECUs
When it comes to the validation of control units, individual departments are often distributed over a manufacturer's various locations. This can lead to delays in the validation process, especially during system tests. New software versions that can only be flashed by the relevant department are often sent to a central system testing department in the classical way, which then integrates them into the network. This leads to delays and possibly to problems, especially if a new software update has to be tested quickly. In order to optimize this process, it would be ideal to connect the interfaces of the ECUs via a common network (intranet). This would mean that the component test departments could build a "web-based" vehicle network via a common server. By already performing the system tests in the component test stage, integration problems can be detected much earlier. The development process would, therefore, be time and quality optimized.
The individual mini-HiL systems can send all the signals of the interfaces (often CAN and other bus systems) to the server, which in turn returns the signals to the mini-HiL systems. Furthermore, it is possible to implement a test automation on the server, which sends the corresponding stimulation commands to the individual mini-HiLs. In this way, for example, a test run for all ECUs could be simulated, without them being actually interconnected. The prerequisite for implementation is a very powerful network with very fast transfer rates and very powerful servers.
The engineers at ServiceXpert Gesellschaft für Service-Informationssysteme mbH regularly work within the framework of ESG-Group’s internal R&D programs with the development of efficient test and simulation solutions that are practical and problem-specific for manufacturers of large and small vehicle series.
When evaluating a web-based vehicle network for system testing, the following important results, amongst others, were achieved:
- Requirements specification of the server
- Development of the server gateway/router functionality
- Development of server event logging
- Development of the server message trace
- Important know-how regarding the compatibility between different software versions and libraries as well as the scope of the modules used.
The results and the additional know-how gained from this internal research project already feed into existing and new tasks and contribute to the productivity of our customer projects.
ServiceXpert, an ESG-Group company, employs over 85 staff in Hamburg and Munich. ServiceXpert is a Europe-wide operating system and software house with a focused service portfolio for Lifecycle management of EE information for leading manufacturers of commercial vehicle and their supplier industry.