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Road Track Friction

Configure road for braking test

Description

The Road Track Friction block implements the road, including friction, for the Braking Test. Use the Type of surface parameter to specify the friction coefficient scaling factor:

  • Constant friction coefficient scaling factor — Constant surface friction during the maneuver

  • Split friction coefficient scaling factor — Two friction coefficients

    Select this option to specify the friction scaling coefficients for a split-mu braking test. Use the enabled parameters to set the ground friction and rectangular surface friction coefficient scaling factors.

Ports

Input

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Wheel displacement along the earth-fixed X-axis, specified as a 4-by-1 array.

Wheel displacement along the earth-fixed Y-axis, specified as a 4-by-1 array.

Vehicle cg, along earth-fixed axis, specified as a 3-by-1 array.

Output

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Wheel friction coefficient, specified as a 4-by-1 array.

Parameters

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  • Constant friction coefficient scaling factor — Constant surface friction during the maneuver

  • Split friction coefficient scaling factor — Two friction coefficients

    Select this option to specify the friction scaling coefficients for a split-mu braking test. Use the enabled parameters to set the ground friction and rectangular surface friction coefficient scaling factors.

Scaling factor for the ground friction coefficient.

Scaling factor for the friction coefficient of the rectangular surface.

Dependencies

To enable this parameter, set Type of surface/track to Split friction coefficient scaling factor.

X coordinate of lower left corner of rectangular surface, in earth-fixed coordinate system, in m.

Dependencies

To enable this parameter, set Type of surface/track to Split friction coefficient scaling factor.

Y coordinate of lower left corner of rectangular surface, in earth-fixed coordinate system.

Dependencies

To enable this parameter, set Type of surface/track to Split friction coefficient scaling factor.

Rectangular surface width in X direction, in m.

Dependencies

To enable this parameter, set Type of surface/track to Split friction coefficient scaling factor.

Rectangular surface width in Y direction, in m.

Dependencies

To enable this parameter, set Type of surface/track to Split friction coefficient scaling factor.

Introduced in R2021a