tireData Properties
tireData
properties contain information that describe tire
dynamics. Use dot notation to refer to a particular object and property.
tData = tireData(filepath); coordSystem = tData.CoordinateSystem;
Note
Nonempty properties specified as a column vector must all be the same length.
Read-Only Properties
CoordinateSystem
— Coordinate system
"ISO"
(default) | "SAE"
| "H"
This property is read-only.
Coordinate system, specified as "ISO"
, "SAE"
,
or "H"
. For more information, see Tire and Wheel Coordinate Systems.
Note
Use the coordinateTransform
function to transform tire data channels to a
specified coordinate system.
Filename
— Data file name
string
This property is read-only.
Data file name, specified as a string.
Filepath
— Data file path
string
This property is read-only.
Data file path, specified as a string.
Elapsed Time and Segment
et
— Elapsed time
column vector
Elapsed time, specified as a column vector with nonnegative values, in s.
Data Types: double
seget
— Segment elapsed time
column vector
Segment elapsed time, specified as a column vector with nonnegative values, in s.
Data Types: double
segment
— Test segment number
column vector
Test segment number, specified as a column vector.
Data Types: double
measnumb
— Measurement number
column vector
Measurement number, specified as a column vector.
Data Types: double
Forces, Moments, and Pressure Information
Fx
— Longitudinal force
column vector
Longitudinal force, specified as a column vector, in N.
Data Types: double
Fy
— Lateral force
column vector
Lateral force, specified as a column vector, in N.
Data Types: double
Fz
— Normal force
column vector
Normal force, specified as a column vector, in N.
Data Types: double
Mx
— Overturning moment
column vector
Overturning moment, specified as a column vector, in Nm.
Data Types: double
My
— Rolling moment
column vector
Rolling moment, specified as a column vector, in Nm.
Data Types: double
Mz
— Self-aligning moment
column vector
Self-aligning moment, specified as a column vector, in Nm.
Data Types: double
Tw
— Wheel torque
column vector
Wheel torque, specified as a column vector, in Nm.
Data Types: double
IP
— Inflation pressure
column vector
Inflation pressure, specified as a column vector with nonnegative values, in kPa.
Data Types: double
Slip Information
alpha
— Slip angle
column vector
Slip angle, specified as a column vector, in rad.
Data Types: double
gamma
— Inclination angle
column vector
Inclination angle, specified as a column vector, in rad.
Data Types: double
kappa
— Longitudinal slip
column vector
Longitudinal slip, specified as a column vector, dimensionless.
Data Types: double
phi
— Total tire spin
column vector
Total tire spin, specified as a column vector, in 1/m.
Data Types: double
phit
— Turn slip
column vector
Turn slip, specified as a column vector, in 1/m.
Data Types: double
Velocity Information
Vx
— Longitudinal velocity
column vector
Longitudinal velocity, specified as a column vector, in m/s.
Data Types: double
Vy
— Lateral velocity
column vector
Lateral velocity, specified as a column vector, in m/s.
Data Types: double
V
— Total velocity
column vector
Total velocity, specified as a column vector, in m/s.
Data Types: double
omega
— Wheel spin velocity
column vector
Wheel spin velocity, specified as a column vector, in rad/s.
Data Types: double
psidot
— Turn slip velocity
column vector
Turn slip velocity, specified as a column vector, in rad/s.
Data Types: double
Length Information
RL
— Loaded radius
column vector
Loaded radius, specified as a column vector, in m.
Data Types: double
Re
— Effective radius
column vector
Effective radius, specified as a column vector, in m.
Data Types: double
Rdyn
— Dynamic rolling radius
column vector
Dynamic rolling radius, specified as a column vector, in m.
Data Types: double
rhoz
— Radial deflection
column vector
Radial deflection, specified as a column vector, in m.
Data Types: double
dist
— Travel distance
column vector
Travel distance, specified as a column vector, in m.
Data Types: double
sig_x
— Longitudinal relaxation length
column vector
Longitudinal relaxation length, specified as a column vector, in m.
Data Types: double
sig_y
— Lateral relaxation length
column vector
Lateral relaxation length, specified as a column vector, in m.
Data Types: double
patch_a
— Half the contact patch length
column vector
Half the contact patch length, specified as a column vector, in m.
Data Types: double
patch_b
— Half the contact patch width
column vector
Half the contact patch width, specified as a column vector, in m.
Data Types: double
Temperature Information
Ta
— Ambient temperature
column vector
Ambient temperature, specified as a column vector, in degC.
Data Types: double
Tsurface
— Test surface temperature
column vector
Test surface temperature, specified as a column vector, in degC.
Data Types: double
TtreadI
— Tread surface temperature (inside shoulder)
column vector
Tread surface temperature (inside shoulder), specified as a column vector, in degC.
Data Types: double
TtreadC
— Tread surface temperature (center rib)
column vector
Tread surface temperature (center rib), specified as a column vector, in degC.
Data Types: double
TtreadO
— Tread surface temperature (outside shoulder)
column vector
Tread surface temperature (outside shoulder), specified as a column vector, in degC.
Data Types: double
Tsidewall
— Sidewall surface temperature
column vector
Sidewall surface temperature, specified as a column vector, in degC.
Data Types: double
Tinnerliner
— Innerliner surface temperature
column vector
Innerliner surface temperature, specified as a column vector, in degC.
Data Types: double
Tcavity
— Tire cavity air temperature
column vector
Tire cavity air temperature, specified as a column vector, in degC.
Data Types: double
Tire Information
Manufacturer
— Tire manufacturer
string scalar
Tire manufacturer, specified as a string scalar.
Data Types: string
TireLine
— Tire line
string scalar
Tire line, specified as a string scalar.
Data Types: string
ConstructionNumber
— Tire construction number
string scalar
Tire construction number, specified as a string scalar.
Data Types: string
SerialNumber
— Tire serial number
nonnegative scalar
Tire serial number, specified as a nonnegative scalar, unitless.
Data Types: double
TireSize
— Tire size
string scalar
Tire size, specified as a string scalar.
Example: TireSize="275/65R18"
Data Types: string
SectionWidth
— Section width
nonnegative scalar
Section width, specified as a nonnegative scalar, in mm.
Example: SectionWidth=275
Data Types: double
AspectRatio
— Aspect ratio
nonnegative scalar
Aspect ratio, specified as a nonnegative scalar, in percent.
Example: AspectRatio=65
Data Types: double
RimDiameter
— Rim diameter
nonnegative scalar
Rim diameter, specified as a nonnegative scalar, in inches.
Example: RimDiameter=18
Data Types: double
OverallDiameter
— Overall diameter
nonnegative scalar
Overall diameter, specified as a nonnegative scalar, in m.
Example: OverallDiameter=0.815
Data Types: double
LoadIndex
— Load index
nonnegative scalar
Load index, specified as a nonnegative scalar, unitless.
Example: LoadIndex=116
Data Types: double
SpeedSymbol
— Speed symbol
string scalar
Speed symbol, specified as a string scalar.
Data Types: string
StampedMaxLoad
— Stamped max load
nonnegative scalar
Stamped max load, specified as a nonnegative scalar, in kg.
Example: StampedMaxLoad=1250
Data Types: double
DOTcode
— DOT tire identification number
string scalar
DOT tire identification number, specified as a string scalar.
Data Types: string
Tire Mass and Inertia
Mass
— Tire mass
nonnegative scalar
Tire mass, specified as a nonnegative scalar, in kg.
Data Types: double
Ix
— Tire rotational inertia about x
-axis
nonnegative scalar
Tire rotational inertia about the x
-axis,
specified as a nonnegative scalar, in kg*m^2.
Data Types: double
Iy
— Tire rotational inertia about y
-axis
nonnegative scalar
Tire rotational inertia about the y
-axis,
specified as a nonnegative scalar, in kg*m^2
Data Types: double
Iz
— Tire rotational inertia about z
-axis
nonnegative scalar
Tire rotational inertia about the z
-axis,
specified as a nonnegative scalar, in kg*m^2.
Data Types: double
Tire Test Information
TestDate
— Test data and time
datetime
scalar
Test data and time, specified as a datetime
scalar.
TestFacility
— Test facility
string scalar
Test facility, specified as a string scalar.
Data Types: string
TestMachine
— Test machine
string scalar
Test machine, specified as string scalar.
Data Types: string
TestRequest
— Test request identifier
string scalar
Test request identifier, specified as a string scalar.
Data Types: string
TestMethod
— Test method
string scalar
Test method, specified as a string scalar.
Data Types: string
RimWidth
— Test rim width
nonnegative scalar
Test rim width, specified as a nonnegative scalar, in inches.
Data Types: double
NominalFz
— Nominal test load
nonnegative scalar
Nominal test load, specified as a nonnegative scalar, in N.
Data Types: double
NominalIP
— Nominal inflation pressure
nonnegative scalar
Nominal inflation pressure, specified as a nonnegative scalar, in Pa.
Data Types: double
NominalAlpha
— Nominal slip angle
scalar
Nominal slip angle, specified as a scalar, in rad.
Data Types: double
NominalGamma
— Nominal inclination angle
scalar
Nominal inclination angle, specified as a scalar, in rad.
Data Types: double
NominalKappa
— Nominal longitudinal slip
scalar
Nominal longitudinal slip, specified as a scalar, unitless.
Data Types: double
PressureRegulation
— Inflation pressure regulation method
string scalar
Inflation pressure regulation method, specified as a string scalar.
Data Types: string
Surface
— Test surface description
string scalar
Test surface description, specified as a string scalar.
Data Types: string
SurfaceCondition
— Test surface condition description
string scalar
Test surface condition description, specified as a string scalar.
Data Types: string
SurfaceCurvature
— Test surface curvature
scalar
Test surface curvature, specified as a scalar, in 1/m.
Data Types: double
TireWheelAssembly
— Tire and wheel assembly notes
string scalar
Tire and wheel assembly notes, specified as a string scalar.
Data Types: string
Comments
— Comments about test
string vector
Comments about test, specified as a string vector.
Data Types: string
User Data
UserData
— User data channel to store user-defined data
column vector
User data channel to store user-defined data, specified as a column vector.
Data Types: double
Version History
Introduced in R2023b
See Also
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