Calspan - MapleSim Help

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Calspan

Calspan tire model used to determine the forces and moments developed at the tire contact patch

The Calspan tire model, which is used in the Iltis vehicle model described in reference [1], computes expressions for the lateral force and aligning moment. The longitudinal force, rolling resistance moment, and overturning moment are assumed to be zero.

Note: The $\mathrm{hubFrame}$ port of the Calspan component must be connected directly to the $\mathrm{hubFrame}$ port of a tire body component, as shown below.

Connections

 Name Description Color $\mathrm{hubFrame}$ Tire reference frame, which must be connected to a tire body component. Gray

Parameters

Note: All units are assumed to be in SI unless otherwise noted.

 Symbol Default Units Description ID ${A}_{\mathrm{0...4}}$ $\left[2625,14.47,12930,2.29,18175\right]$ - Lateral force coefficients A0A4 ${\mathrm{AΩ}}_{t}$ $1$ - Lateral force coefficient AWt ${B}_{\mathrm{1...4}}$ $\left[-0.0000464,0,1.216,2.18{10}^{-11}\right]$ - Friction coefficients B1B4 $\mathrm{SN}$ $1.0274$ - Skid number ratio SN ${\mathrm{AF}}_{\mathrm{1...4}}$ $\left[-0.0000171,-0.0000171,0\right]$ - Friction coefficients AF1AF3

References

 1 "The Iltis Benchmark Problem Definition", in  Multibody Computer Codes in Vehicle System Dynamics, W. Kortum and R. Sharp, editors, Supplement to the Vehicle System Dynamics journal, Vol.22, Swets and Zeitlinger, 1993,  pp. 216-226.

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