Brake Torque Application

Adams Car Package > Adams Car > Appendix > Solver Routines > Brake Torque Application

Brake Torque Application

In Adams Car, the torque required for braking is applied through a user-written VTORQUE subroutine. To decelerate the vehicle at the user specified value, this routine accesses the necessary brake torque from a Proportional-Integral Braking Controller (see Braking Controllers). The brake torques are applied at the wheels and are reacted at the spindles. The VTORQUE statement to invoke the brake torque application should be as follows:

VTORQUE/id, I = imrk, JFLOAT = jmrk, RM = rmrk
, FUN=USER (1106, itire, difid,spd_var )

where:

id	=	Vtorque statement id.
imrk	=	Marker on wheel at which the torque is applied.
jmrk	=	Floating marker at which the reaction torque is applied.
rmrk	=	Reference marker in whose coordinate system the torque is applied.
itire	=	Tire id corresponding to the VTORQUE statement.
difid	=	(Optional) Id of the differential equation balancing the longitudinal reaction force on the body to ground inline jprim.
spd_var	=	Variable id representing wheel speed. Wheel speed is used to stop applying torque, when the wheel starts to spin in the opposite direction.