High-Fidelity Transmission Simulation for Hardware-in-the-Loop Applications
نویسندگان
چکیده
As automotive manufacturers strive to improve fuel-efficiency of their products, all components and sub-systems that go into a vehicle are under closer examination in order to minimize energy losses. In transmissions in particular, a great deal of effort is being put into assessing exactly how much power is lost, and what can be done to reduce those losses and improve overall efficiency. By investigating the losses at a very detailed level, new high-efficiency transmissions can be produced, through optimizing existing configurations, adopting new configurations, employing new innovations in components, and developing advanced controllers. These investigations are greatly enhanced through the use of physicsbased simulation tools to create virtual prototypes of the transmission systems. These yield more efficient products at significantly reduced costs, by allowing engineers to address design issues long before investing in the physical prototype stage. These advantages are further enhanced if these highfidelity models can be used to develop and test powertrain controllers in a real-time simulation environment. This paper will present the use of symbolic technologies from Maplesoft for developing highly-efficient code for real-time implementation of transmission models with loss data included. It will also cover results from a recent Hardware-inthe-Loop testing project that demonstrate that the symbolic approach to model code-generation for real-time implementation can deliver dramatic execution speed improvements over other modeling approaches.
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