In the past decade there has been a clear development trend towards complex and closed loop controlled transmissions like DCT's or hybridized transmissions. In addition to the system design challenges of such systems, the complex control requirements led to big challenges within the functional frame of the control units. More and more precise acting control modules and state machines became necessary to fully use the potential regarding driving comfort and fuel efficiency. Excellent knowledge about transmission, powertrain and software development must be combined to match these requirements. In addition the aspect of functional safety with standards like ISO 26262 must be fulfilled in the development process. This paper briefly describes how these requirements can be met in transmission development projects. It begins with the technical aspect of systematic use of control theory using FEV's 4 step approach of abstraction, analysis, synthesis and validation. After this technical part the focus goes towards the process related part of software development from the requirement set up, over the model based design with automated tool chains up to the software integration. The functional testing even in a very early stage of development in MiL, SiL and HiL will be shown as well as the final validation with real hardware. Using the described approaches, it is possible to effectively develop high quality functionalities for production use or for demonstrator- and prototype transmissions.
Function development for transmission control units - FEV's methods and processes
2013
11 Seiten, 4 Bilder, 7 Quellen
Conference paper
English
Function development for transmission control units - FEVs methods and processes
Automotive engineering | 2013
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