ELECTRIC VEHICLE SIMULATION FOR DESIGN OPTIMIZATION

Currently available electric passenger vehicles have revealed a lack of design sophistication that has highlighted the need for an accurate method of forecasting performance. An electric vehicle computer simulation program was developed to satisfy that need. The approach was to establish a very comprehensive and flexible vehicle model and simulate its operation on a realisitc driving cycle. The driving cycle selected was the Federal Urban Driving Sequence. A thorough vehicle model was established that incorporates aerodynamic drag, rolling resistance, both rotational and translational inertial effects, and component by component dynamic power train efficiencies. Battery discharge performance is tracked by a fractional-utilization algorithm with corrections for short-term discharge effects. The simulation compares required power obtained from the driving cycle speed schedule and vehicle model characteristics with the available power at the motor for each time increment of the driving cycle to compute battery fraction used and deviation from the speed schedule when available power is insufficient. These results of the simulation can be used to evaluate an existing vehicle's performance, or, if desired, to develop vehicle parameters to obtain a specified performance level.

• Corporate Authors:

  Air Force Institute of Technology

  Wright-Patterson Air Force Base
  Dayton, OH  United States  45433
• Authors:
  • Stafford, K A
• Publication Date: 1980-12

Media Info

• Pagination: 119 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Algorithms; Analysis; Costs; Design; Drag; Electric automobiles; Electric batteries; Electric discharge; Electric vehicles; Gears; Human machine systems; Hybrid vehicles; Lead acid batteries; Mathematical analysis; Mathematical models; Motors; Optimization; Passenger vehicles; Performance; Road tests; Rolling; Simulation; Theses; Transmissions; Vehicle drive systems; Velocity; Voltage
• Uncontrolled Terms: Cost analysis; Hybrid systems; Models
• Old TRIS Terms: Cycles; Optimum design; Performance engineering; Resistance; Transmission gears
• Subject Areas: Design; Energy; Finance; Highways; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00336942
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: AFIT/GAE/AA/80D-19 MS Thesis
• Files: TRIS
• Created Date: Jun 12 1981 12:00AM