Hybrid Vehicle Model Development using ASM AMESim Simscape Co Simulation for Real Time HIL Applications
Hardware in the loop (HIL) simulation is a real time testing process that has been proven indispensable for the modern vehicle dynamics, powertrain, chassis and body systems electronic controls development. The high quality standards and robustness of the control algorithms can only be met by means of detailed vehicle plant simulation models. In the last few years, several efforts have been made to develop detailed plant models. Several tools for the vehicle modeling are available in the market and each tool has different and distinct advantages. This paper addresses ways that dSPACE Automotive Simulation Models (ASM) can support the model based development processes. Additional modern software tools that were used in connection with the ASM are LMS AMESim and Mathworks SimDriveline (of Simscape) ASM is an open Matlab/Simulink model environment used for offline PC based simulation and online real time platform HIL testing. The combinations of system models from different suppliers typically require significant adaptation effort. dSPACE's ASM are ideally adapted to dSPACE hardware in the loop simulators with real time capability whereas the AMESim environment requires a special procedure to make it compliant with dSPACE real time hardware. This paper describes how AMESim vehicle dynamics, SimDriveline automatic transmission models and ASM parallel hybrid vehicle models are integrated for a dSPACE HIL real time simulation environment. INTRODUCTION Today, depletion of petroleum resources with rising fuel prices have globally become a reason for concern, and it is commonly thought throughout the world that current automotive technology will need to be adapted or replaced for the future. To provide significant reductions in oil use and CO2 emissions there are a variety of different technology options [1] The most promising is fuel economy improvement. Improving the fuel economy of vehicles has a crucial impact on the amount of oil imported. So far, the most promising technologies are hybrid electric vehicles (HEV) Hybrid vehicles, using current internal combustion engines (ICEs) as their primary power source, and batteries /electric motors as energy buffer, have much higher fuel efficiency than those powered by ICEs alone. A typical hybrid electric vehicle combines several complex components in its powertrain such as combustion engines, electric motors, battery, automatic and/or power split transmission, intermediate clutches, etc. HEV contains complex interaction between different powertrain devices and incorporates complex electronic control unit (ECU) network. For the vehicles of the future, comprehensive ECU tests are more necessary than ever before, as the complexity and extent of the software increases at a breathtaking speed [2] The Vcycle is a widely recognized approach in the development of electronic control units (ECUs) which incorporates offline controller development to HIL testing at the end of development cycle. Development of ECU's and to test its Hybrid Vehicle Model Development using ASMAMESim Simscape Co Simulation for Real Time HIL Applications 2012 01 0932 Published 04/16/2012