
Relationship between automotive manufacturer and supplier
 manufacturers define system requirements and environment.
 suppliers are responsible for system development (thermo control, ABS...)
 good cooperation between manufacturer and suppliers results in short and efficient development cycles.




Motivation
 System design requires models for adaptation and simulation of system + environment
 Seamless design flow requires modeling language usable on all simulators to save cost for model development and tool purchase

Goals of Working Group VHDLAMS


Tasks of Working Group VHDLAMS
 Development of model examples
 implementation of models in VHDLAMS
 exchange of models including test bench and documentation
 exchange of experiences concerning simulation results of different tools (stability, computation time etc.)
 Evaluation of tools for converting SPICE, MAST, … to VHDLAMS
 Definition of a subset of VHDLAMS for Realtime applications (VHDLAMSRT) to model plants tool independently
 Cooperation with tool developer (Avant!, ETAS, Mathworks, Mentor Graphics, …)
 Building of an MSR library and package

VHDLAMS Modeling Concepts
 Structural decomposition
 Communication
 Analog
 Differential algebraic equations
 transfer functions
 Event driven (time discrete)
 event driven communicating parallel processes
 Analog  discrete (event driven) interaction

VHDLAMS Subset for RealTime (VHDLAMSRT)

Example of RealTime Subset (VHDLAMSRT)

Advantages of unified modeling with VHDLAMS
 Readable documentation of discontinuous behavior
 Facilitates model exchange
 Facilitates model reuse
 Facilitates tool substitution
 Reduces training cost
 Gives chance for niche products with solutions for partial problems
 Competition will strengthen capabilities of the tools and will (hopefully) reduce tool cost
 Modeling concepts have proper semantics
