Adams Car Package > Adams Car > Appendix > Solver Routines > Quasi-Static Steady-State Cornering Equilibrium

Quasi-Static Steady-State Cornering Equilibrium

The quasi-static steady-state cornering event is similar to Static Steady-State Cornering Equilibrium case except several iterations of lateral acceleration can be simulated at a given turn radius. This option is useful in constant radius understeer test simulations. The balance of forces and all other functions of the static straight line equilibrium are the same for the quasi-static case.
The CONSUB can be invoked in the quasi-static steady-state constant cornering mode by typing the following at the Adams prompt:
CONTROL/FUN=USER (1031,jpr_ary,brk_flg,glon,sta_g,end_g,nsteps,radius,bank,cg_id,ijm,jjm,halt,origo)
where:
 
jpr_ary
=
Id of array containing the necessary jprims, motions, sforce ids to perform the static equilibrium 
brk_flg
=
flag to specify whether deceleration should be applied as braking or throttle off deceleration. For throttle off deceleration the applied deceleration is balanced by forces/moments generated at the driven wheels. For braking deceleration the deceleration is balanced by braking forces/moments at all wheels based on braking ratios (Car models only)
1 - braking deceleration
0 - throttle off deceleration (default)
glon
=
Longitudinal acceleration/deceleration. Cornering event is performed at this specified longitudinal g level.
positive value = acceleration
negative value = deceleration
sta_g
=
Reserved
end_g
=
final level of lateral acceleration to impose on the vehicle 
positive value = right hand turn 
negative value = left hand turn
nsteps
=
number of steps for the output (i.e. acceleration increment = end_g / nsteps)
radius
=
radius of turn (mm)
bank
=
(Optional) bank angle in degrees with default being zero (deg) 
positive value = road banks into corner (i.e. outside of turn is higher than inside of turn) 
negative value = road is off-cambered and banks out of corner (i.e. inside of turn is higher than outside of turn) 
cg_id
=
(Optional) body C.G. MARKER id. Default is 5100 
ijm
=
(Optional). I MARKER on steering wheel part of new steering system JOINT 740. If = 0, CONSUB assumes default value of 1080
jjm
=
(Optional). J MARKER on auxiliary steering column of new steering system JOINT 740. If = 0, CONSUB assumes default value of 8010
halt
=
(Optional) parameter to terminate or continue a simulation after a static failure.
1 - stop the simulation if static fails (default).
0 - continue the simulation if static fails.
origo
=
(Optional). Marker defining the coordinate system is which model was created. (Standard Adams Car models have vehicle forward as -X).Default marker id is 3
 
The first time this CONSUB is invoked, the initial speed level is assumed to be zero. If the user invokes it a second time, the initial speed level will be the end_s of the last call to this CONSUB.