Card 3 -Initial Conditions: Veh2

XCP20

YCP20

PSI20

PSID20

U20

V20

JTTO(2)

AANGLE2

THETD2

3

Card: Field

Variable

Description

Original

Units

Default

Units

Metric Units

3:1

XCP20

Xc20

The X' coordinate of the center of gravity of vehicle 2, (V2). A fixed Cartesian coordinate system is used, with the positive X' axis shown pointing upward, and the positive Y' axis to the right. Angles are measured clockwise from the positive X' axis.

Inches

feet

meters

3:2

YCP20

Yc20

The Y'-coordinate of the center of mass of V2. (see comments on XCP10).

Inches

feet

meters

3:3

PSI20

ψ20

The heading angle of V2 measured clockwise from the positive X' axis.

Degrees

3:4

PSID20

The angular velocity of V2. Taken to be positive when rotation is clockwise.

deg/sec

3:5

U20

U20

The initial forward velocity of V2. The longitudinal component of the total vector velocity of V2.

in/sec

MPH

m/sec

3:6

V20

V20

The initial sideways (lateral) velocity of V2 with right taken as positive.

in/sec

MPH

m/sec

3:7

JTTO(2)

Trailer option indicator. Set = 1.0 for trailer on veh#2; = 0 if no trailer. Note: Vehicle #2 can only use the Trailer option if vehicle#1 also has a Trailer. Please note that m-smac input cards 22 & 23 are also required for the Veh 2 trailer option.

See additional information on Trailer Option and input requirements for Trailer Option

3:8

AAngle2

θ20-ψ20

Initial trailer articulation angle with respect to tractor x axis.

Note: AAngle2 = THET2-PSI2

degrees

3:9

THETD2

Initial trailer angular velocity. Taken to be positive when rotation is clockwise.

deg/sec


More:

Dimensional and Inertial Properties