Development and Application of VPG Simulation Technique based on Equivalent Virtual Road Profile

作者：Kang Dae Oh; Park Kihong^*; Heo Seung Jin; Ryu Young Il; Il Jeong Jay

来源：International Journal of Precision Engineering and Manufacturing, 2010, 11(2): 265-272.

DOI：10.1007/s12541-010-0030-3

• Virtual Proving Ground
• Equivalent Virtual Road Profile
• Back Calculation
• Durability Analysis

A Virtual Proving Ground (VPG) is a vehicle simulation environment used for evaluating durability of the suspension elements. Among the components that comprise the VPG system, the tire model with its complex nonlinear characteristics has most significant impact on the credibility of the estimated durability. This research proposes a method for generating an equivalent road profile as a way to compensate for the limits involved in modeling details of the tire characteristics. The method first identifies the frequency response function from the road heights to the spindle forces, which would contain rich information on the tire's effect on the vehicle dynamics. Then it back-calculates a road profile using this model and the spindle force measurement. Finally the solution is updated iteratively until it yields the spindle forces close to their measured values. Using the proposed method, an equivalent road profile was successfully generated from a spindle force measurement collected from a physical durability test. In order to investigate validity of the proposed method, durability analysis was performed for a suspension component a lower control arm. From the preliminary VPG simulation results, it was confirmed that the estimated fatigue life agreed well with the estimation based upon the force measurement.

• 出版日期2010-4