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WOLFRAM SYSTEM MODELER

SummerTireOnAsphalt

Model of a car tire on asphalt

Wolfram Language

In[1]:=

SystemModel["EducationExamples.MechanicalEngineering.SlidingCar.Components.Wheels.SummerTireOnAsphalt"]

Out[1]:=

Information

This model of a summer tire on asphalt is based on the DryFrictionWheelJoint model from the Planar Mechanics Library. The friction coefficients for adhesion and sliding have been adjusted to fit the condition of a summer tire on asphalt. The friction coefficient at adhesion is set to 0.9, and the friction coefficient at sliding is set to 0.7.

Parameters (15)

stateSelect	Value: StateSelect.default Type: StateSelect Description: Priority to use acceleration as states
radius	Value: 0.25 Type: Length (m) Description: radius of the wheel
r	Value: {0, 1} Type: Length[2] (m) Description: driving direction of the wheel at angle phi = 0
N	Value: 1000 Type: Force (N) Description: normal force
vAdhesion	Value: 0.15 Type: Velocity (m/s) Description: adhesion velocity
vSlide	Value: 0.35 Type: Velocity (m/s) Description: sliding velocity
mu_A	Value: 0.9 Type: Real Description: friction coefficient at adhesion
mu_S	Value: 0.7 Type: Real Description: friction coefficient at sliding
l	Value: sqrt(r * r) Type: Length (m)
e	Value: r / l Type: Real[2] Description: normalized direction
animate	Value: true Type: Boolean Description: = true, if animation shall be enabled
SimVis	Value: false Type: Boolean Description: perform animation with SimVis
zPosition	Value: planarWorld.defaultZPosition Type: Length (m) Description: z position of the body
diameter	Value: 0.1 Type: Length (m) Description: diameter of the rims
width	Value: diameter * 0.6 Type: Length (m) Description: width of the wheel

Inputs (1)

specularCoefficient	Default Value: planarWorld.defaultSpecularCoefficient Type: SpecularCoefficient Description: Reflection of ambient light (= 0: light is completely absorbed)

specularCoefficient

Default Value: planarWorld.defaultSpecularCoefficient

Type: SpecularCoefficient

Description: Reflection of ambient light (= 0: light is completely absorbed)

Connectors (2)

	frame_a	Type: Frame_a Description: Coordinate system (2-dim.) fixed to the component with one cut-force and cut-torque (blue icon)
	flange_a	Type: Flange_a Description: One-dimensional rotational flange of a shaft (filled circle icon)

frame_a

Type: Frame_a

Description: Coordinate system (2-dim.) fixed to the component with one cut-force and cut-torque (blue icon)

flange_a

Type: Flange_a

Description: One-dimensional rotational flange of a shaft (filled circle icon)

Components (4)

	planarWorld	Type: PlanarWorld Description: planar world model
	cylinder	Type: Shape Description: Visualizing an elementary object with variable size; all data have to be set as modifiers (see info layer)
	rim1	Type: Shape Description: Visualizing an elementary object with variable size; all data have to be set as modifiers (see info layer)
	rim2	Type: Shape Description: Visualizing an elementary object with variable size; all data have to be set as modifiers (see info layer)

Extended by (1)

Wheel

EducationExamples.MechanicalEngineering.SlidingCar.Car

Model of the wheels used in the car