Tire (Simple)

No-slip tire model with minimal parameters

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  • Library:

  • Simscape / Driveline / Tires & Vehicles

Description

The Tire (Simple) block represents a simple, no-slip model of a tire that you parameterize by tire radius.

You can optionally add inertia, stiffness, or damping. These dynamics require additional computation that tends to make models less suitable for real-time simulation.

Assumptions and Limitations

  • The tire does not slip.

  • Torque-transfer capability is infinite.

Ports

Conserving

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Mechanical rotational port associated with the axle that the tire sits on.

Mechanical translational port associated with the wheel hub that transmits the thrust generated by the tire to the remainder of the vehicle.

Parameters

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The table shows how the visibility of some Tire (Simple) parameters depends on the option that you choose for other parameters. To learn how to read the table, see Parameter Dependencies.

Parameter Dependencies

Parameter

Rolling Radius

Compliance — Choose No compliance - Suitable for HIL simulation or Specify stiffness and damping

No compliance - Suitable for HIL simulationSpecify stiffness and damping

Longitudinal stiffness

Longitudinal damping

Inertia — Choose No Inertia or Specify inertia and initial velocity

No InertiaSpecify inertia and initial velocity

Tire inertia

Initial velocity

Rolling radius of the tire. The rolling radius must be greater than zero.

Include or neglect longitudinal stiffness and damping.

Dependencies

Selecting Specify stiffness and damping exposes other parameters. For more information, see Parameter Dependencies.

Longitudinal stiffness of the tire. The parameter must be greater than zero.

Dependencies

This parameter appears only if the Compliance parameter is set to Specify stiffness and damping. For more information, see Parameter Dependencies.

Longitudinal damping of the tire. The parameter must be greater than zero.

Dependencies

This parameter appears only if the Compliance parameter is set to Specify stiffness and damping. For more information, see Parameter Dependencies.

Include or neglect tire inertia.

Dependencies

Selecting Specify inertia and initial velocity exposes other parameters. For more information, see Parameter Dependencies.

Rotational inertia of the tire.

Dependencies

This parameter appears only if the Inertia parameter is set to Specify inertia and initial velocity. For more information, see Parameter Dependencies.

Initial rotational velocity of the tire.

Dependencies

This parameter appears only if the Inertia parameter is set to Specify inertia and initial velocity. For more information, see Parameter Dependencies.

Model Examples

Vehicle with Four-Wheel Drive

Vehicle with Four-Wheel Drive

A four-wheel drive vehicle starting from rest and ascending a 15 degree incline. Initially the vehicle rolls backwards until the engine develops sufficient torque to counter the slope. The tire compliance dynamics can be seen as the vehicle starts to accelerate. The model variant chosen for all of the tires can be set to the Simple, Friction Parameterized, or Magic Formula tire model using the hyperlinks in the model.

Open Model

More About

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Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

See Also

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Topics

Introduced in R2012a

Simscape Driveline Documentation
Support