FASTSim (Future Automotive Systems Technology Simulator) is a vehicle simulation tool for evaluating the efficiency and performance of on-road vehicles. Developed by the National Laboratory of the Rockies (NLR), it provides fast, accurate estimates of powertrain performance and energy consumption. FASTSim models powertrain technologies from conventional fuel-burning vehicles to hybrids and battery electric vehicles, and has been used to simulate light-duty passenger cars, two-wheelers, and a wide variety of medium- and heavy-duty vocational vehicles.
FASTSim is designed for rapid analysis, making it practical to run many simulations and compare technology scenarios across vehicle classes and use cases. FASTSim outputs also feed other NLR tools, including:
- RouteE: an energy prediction tool and energy-aware routing engine
- T3CO: a medium- and heavy-duty vehicle total cost of ownership assessment tool
- ADOPT: a technology-driven consumer choice and vehicle market adoption model
FASTSim models conventional vehicles, hybrids, plug-in hybrids, and battery electric vehicles over a set of standard regulatory drive cycles. You can also define custom vehicles and custom drive cycles to simulate any on-road vehicle over realistic scenarios.
For detailed documentation on FASTSim, including usage, background, and modeling philosophy, see https://natlabrockies.github.io/fastsim.
For a collection of prebuilt vehicle models, see the FASTSim Vehicle Database.
FASTSim is available as a package for use in Python 3.10 through 3.15.
In an active Python environment, run:
pip install fastsimThis installs the latest FASTSim release as a Python package.
For more detailed instructions, including compilation of FASTSim from source, see the Installation page of FASTSim's documentation.
For instruction on using FASTSim to simulate on-road vehicle performance, see the User Guide section of FASTSim's documentation.