A COMPREHENSIVE ANALYSIS OF METHODS FOR VEHICLE DYNAMICS SIMULATION. PROCEEDINGS ENTITLED "THE DYNAMICS OF VEHICLES ON ROADS AND ON RAILWAY TRACKS"

Recent studies of vehicle riding behavior show growing interest in simulation techniques. These techniques make it easy to analyze effects of changes in vehicle parameters on vehicle dynamics, thus avoiding expensive and time-consuming experimental tests. In applying simulation techniques, it may be advisable to introduce the following nonlinear terms for evaluating dynamic vehicle riding behavior: nonlinear characteristics of elements like shock absorbers and jounce stops; separation of tires from surface; Coulomb friction in suspensions; nonlinearities due to geometric deformations; dry friction of leaf springs; and gyroscopic moments. Analog and hybrid simulation is well-suited for solving small-size systems of ordinary differential equations and nonlinear characteristics can easily be taken into account. Digital simulation consists of using a general digital computer or simulating the behavior of a continuous system using arithmetic operations on samples of input and state variables. Digital simulation is an approximation technique; a digital computer can only implement discrete systems which more or less approximate continuous systems. Simulation languages, associated with digital-analog simulators, allow a digital computer to be used in essentially the same way as an analog computer. These languages refer to a block description of continuous systems and provide the user with a number of linear or nonlinear functional blocks like integrators, adders, multipliers, and limiters. The flexibility of simulation languages can be useful when setup time is relevant.

• Supplemental Notes:
  • Also published in HS-026 982U, "The Dynamics of Vehicles on Roads and on Railway Tracks. Proceedings of International Union of Theoretical and Applied Mechanics Symposium, Delft, Netherlands, 1975 August 18-22," Amsterdam, 1976 p 5-23.
• Corporate Authors:

  International Union of Theoretical and Applied Mechanics

  Chalmers University of Technology, Sweden
  S-412 96 Gothenburg,   Sweden 
• Authors:
  • Genesio, R
  • Laurentini, A
  • Mauro, V
  • Milanese, M
• Publication Date: 1976

Media Info

• Features: References;
• Pagination: 19 p.

Subject/Index Terms

• TRT Terms: Digital computers; Simulation; Vehicle dynamics
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00394093
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: HS-026 983U
• Files: HSL, USDOT
• Created Date: May 31 1985 12:00AM