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 VHDL-AMS

Tasks of Working Group VHDL-AMS

• Development of model examples
  • implementation of models in VHDL-AMS
  • 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 VHDL-AMS
• Definition of a subset of VHDL-AMS for Real-time applications (VHDL-AMS-RT) to model plants tool independently
• Cooperation with tool developer (Avant!, ETAS, Mathworks, Mentor Graphics, …)
• Building of an MSR library and package

VHDL-AMS Modeling Concepts

• Structural decomposition
• Communication
  • signal flow
  • power bond
• Analog
  • Differential algebraic equations
  • transfer functions
• Event driven (time discrete)
  • event driven communicating parallel processes
• Analog - discrete (event driven) interaction
  • threshold crossing
  • break

VHDL-AMS Subset for Real-Time (VHDL-AMS-RT)

• 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