OPTIMIZATION OF RANDOMLY VIBRATING DISCRETE MECHANICAL SYSTEM. RIDE COMFORT AND ROAD HOLDING OF VEHICLES TRAVELLING ON A RANDOMLY PROFILED ROAD

A discrete linear mechanical system excited by correlated stationary random processes at one or more coordinates is optimized. One application is vehicles travelling on a randomly profiled road. A general method to optimize the system is presented. Several performance measures based on the response random processes of the system are formulated. Parameters of the system are optimized to give a minimum value of a performance measure (or a weighted sum of such measures). Constraints on other measures and on parameters can be incorporated. A so called sequential unconstrained minimization technique (sumt) is used. Ride comfort and road holding of a randomly vibrating vehicle are discussed and quantified. Vehicle suspension parameters are optimized for maximum ride comfort and/or maximum road holding. One constraint considered is the limited suspension working space. Speed-dependent optimal suspension parameters are also studied. Other design quantities discussed are the energy absorption in a damper subject to a stationary random deformation, the time to failure under stationary random stresses, and the level-crossing problem of a stationary random process. /TRRL/

  • Corporate Authors:

    Chalmers University of Technology, Sweden

    Avdelningen foer Hallfasthetlaera, Fack
    S-402 20 Goeteborg 5,   Sweden 
  • Authors:
    • Dahlberg, T
  • Publication Date: 1978

Media Info

  • Features: Figures; References;
  • Pagination: 70 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00194467
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: Thesis
  • Files: ITRD, TRIS
  • Created Date: Jun 13 1979 12:00AM