Rack jt

Attaches to the translational joint at the rack for a rack and pinion steering system.

Tire force – Front

Attaches to the front tire force entity in the tire system.

Tire force – Rear

Attaches to the rear tire force entity in the tire system.

Type of suspension front

Option that needs to be set based on the front suspension type.  Available options are:  independent and dependent.

-

Type of suspension rear

Option that needs to be set based on the rear suspension type.  Available options are:  independent and dependent.

-

Tire model

Option to use either a vehicle with force based tire models or switch to simple vertical springs to simulate a tire.

-

Tire static loaded radius - Front

The radius of the front tire with the vehicle weight acting on it.

mm

Tire static loaded radius - Rear

The radius of the rear tire with the vehicle weight acting on it.

mm

Tire vertical spring rate - Front

The spring rate of the front tire. The value is used for computing certain outputs and needs to match the value in the tire property file when using force based tires.

N/mm

Tire vertical spring rate - Rear

The spring rate of the rear tire. The value is used for computing certain outputs and needs to match the value in the tire property file when using force based tires.

N/mm

Rear wheel lateral force
at contact patch

The sideways force applied at the rear wheel contact patch to simulate conditions experienced during cornering.

N

Vehicle CG Height

The vertical distance from the vehicle CG body to the ground.

mm

Wheelbase

The longitudinal distance between the front and rear wheel center.

mm

Front braking ratio

The brake force distribution at the front wheels.  A value of 1 indicates 100% braking on the front.

%

Front drive ratio

The percentage engine power distributed to the front axle.  A value of 1 indicates all power is sent to the front axle.

%

Axle ratio

The ratio between the angular velocity of the input gear to the angular velocity of the output gear. It is also commonly known as gear or speed ratio.

-

Kinematics and compliance parameters

This form should be used to define the simulation conditions such as jounce and rebound distance, steering angle, the contact patch forces, etc.

Vehicle Parameters

This form should be used to define the vehicle conditions such as its weight, CG height, wheelbase, tire stiffness, etc.

Jack Box Front

Box

Represents the square platform for the front jack.

Jack Box Rear

Box

Represents the square platform for the rear jack.

Jack cyl front

Cylinder

Represents the cylindrical column for the front jack.

Jack cyl rear

Cylinder

Represents the cylindrical column for the rear jack.

Jack dummy fixed joint Front

Fixed

Connects the dummy body located at the front contact patch to the knuckle body and is located at the front wheel centers.

Jack dummy fixed joint Rear

Fixed

Connects the dummy body located at the rear contact patch to the knuckle body and is located at the rear wheel centers.

Vehicle body fixed to ground

Fixed

Connects the vehicle body to the ground body and is located at the vehicle body CG.

Rack dummy ball

Ball

Connects the rack to the steering dummy body attachment for a rack and pinion steering wheel.

Jack trans jt - Front

Translational

Connects the front jack body to the ground body and is aligned along global Z.

Inplane joint – Front

In plane

Connects the front wheel to the front jack body and is located at the front contact patch.

Jack trans jt - Rear

Translational

Connects the rear jack body to the ground body and is aligned along global Z.

Inplane joint – Rear

In plane

Connects the rear wheel to the rear jack body and is located at the rear contact patch.

Front wheel center marker

This marker is defined on the front wheel and is located at the front wheel center.  The test rig parameter array refers to this marker.

Rear wheel center marker

This marker is defined on the rear wheel and is located at the rear wheel center.  The test rig parameter array refers to this marker.

WC marker at ground - Front

Marker is defined on the ground body and is located at the front wheel center.  The test rig parameter array refers to this marker.

WC marker at ground - Rear

Marker is defined on the ground body and is located at the rear wheel center.  The test rig parameter array refers to this marker.

Kingpin axis - Front

Marker is defined on the front knuckle and is located at the lower ball joint.  The test rig parameter array refers to this marker.

Kingpin axis - Rear

Marker is defined on the rear knuckle and is located at the average lower ball joint.  The test rig parameter array refers to this marker.

Front wheel patch marker

Marker is defined on the front wheel and is located at the wheel patch.  The marker is used by the front patch force entity.

Rear wheel patch marker

Marker is defined on the rear wheel and is located at the wheel patch.  The marker is used by the rear patch force entity.

Front tire patch

Point that locates the contact patch of the front tire.

Rear tire patch

Point that locates the contact patch of the rear tire.

Jack bot front

Point that locates the bottom of the front jack.  The point is referenced by the jack translational joint.

Jack bot rear

Point that locates the bottom of the rear jack.  The point is referenced by the jack translational joint.

Left Front command

This variable contains the expression for ride and roll phases of the analysis for the left front wheel.  The expression is explained in detail below this table.

Right Front command

This variable contains the expression for ride and roll phases of the analysis for the right front wheel.  The expression is explained in detail below this table.

Left Rear command

This variable contains the expression for ride and roll phases of the analysis for the left rear wheel.  The expression is explained in detail below this table.

Right Rear command

This variable contains the expression for ride and roll phases of the analysis for the right rear wheel.  The expression is explained in detail below this table.

Left Front feedback

Contains the expression that calculates the Global Z Displacement of the left front wheel center marker, relative to the original location of the left front wheel center, in the global coordinate system.

Right Front feedback

Contains the expression that calculates the Global Z Displacement of the right front wheel center marker, relative to the original location of the right front wheel center, in the global coordinate system.

Left Rear feedback

Contains the expression that calculates the Global Z Displacement of the left rear wheel center marker, relative to the original location of the left rear wheel center, in the global coordinate system.

Right Rear feedback

Contains the expression that calculates the Global Z Displacement of the right rear wheel center marker, relative to the original location of the right rear wheel center, in the global coordinate system.

Left Front jack

Contains the expression that is used by the left front jack actuation force.  The expression itself is explained in detail after this table.

Right Front jack

Contains the expression that is used by the right front jack actuation force. T he expression itself is explained in detail after this table.

Left Rear jack

Contains the expression that is used by the left rear jack actuation force.  The expression itself is explained in detail after this table.

Right Rear jack

Contains the expression that is used by the right rear jack actuation force.  The expression itself is explained in detail after this table.

Ds_vehpar.veh_end.ival

Vehicle End:

1=front suspension; 2=rear suspension; 3=2nd rear suspension

Communicates the suspension type to the SDF subroutine. The subroutine calculates different values for certain parameters depending on which end of the vehicle is being analyzed.

Ds_vehpar.dif_mnt.ival

Differential Mount type

0=mounted to body

1=Unsprung mount (integral with the axle)

Used in the SDF calculations in the anti-lift and anti-dive calculations.

Ds_vehpar.tire_slr.value

Tire Static Loaded Radius in mm

Used to locate the “Jack GeomU” point and in many of the SDF calculations.

Ds_vehpar.tire_rate.value

Tire Spring Rate in N/mm

Used in the SDF calculations.

Ds_vehpar.cg_height.value

Vehicle CG height, measured from ground to the CG in the Z direction (mm)

Used in the SDF calculations (especially the Anti-lift and anti-dive calculations).

Ds_vehpar.wheel_base.value

Vehicle Wheelbase (mm)

Used in the SDF calculations (especially the Anti-lift and anti-dive calculations).

Ds_vehpar.front_brake.value

The Ratio of front brake torque to total brake torque. Typically .6 to .7

Used in the SDF calculations (especially the Anti-lift and anti-dive calculations).

Ds_vehpar.front_drive.value

The ratio of the engine torque applied to the front axle divided by total torque

Used in the SDF calculations (especially the Anti-lift and anti-dive calculations).

Ds_vehpar.axle_ratio

The nominal Axle ratio of the suspension being analyzed. Typically in the 2.7-5.0 range.

Used in the SDF calculations (especially the Anti-lift and anti-dive calculations).

Ds_vehpar.veh_weight.value

Total Vehicle Mass in Kg

Not used in SDF calculations and in the vehicle load analysis events.

mrk_wc_frnt.l.id

Left Front Wheel Center Marker ID-Marker at the Left Wheel Center; Z axis points inboard along the spindle axis; ZX marker plane is along Global X; the resulting marker Y axis is down.

The primary point location for left suspension SDF calculations.  Most geometric properties and most Compliant SDF parameters are calculated using this point as input.

mrk_wc_frnt.r.id

Right Front Wheel center Marker ID-Marker at the Right Wheel Center; the marker Z axis points inboard along the spindle axis; the marker ZX plane is along global X; The resulting marker Y axis is up.

The primary point location for right suspension SDF calculations.  Most geometric properties and most Compliant SDF parameters are calculated using this point as input.

mrk_kp_frnt.l.id

Left Front Kingpin Axis Marker ID- The marker placed at the Left Lower Ball Joint or a location that defines a point on the Left Kingpin axis. The Z axis of the marker points to the Left Upper Ball Joint or a point that defines a point on the kingpin axis.

Marker Z axis is used for Caster and Kingpin Inclination calculations for the left side of the vehicle.

mrk_kp_frnt.r.id

Right Front Kingpin Axis Marker ID- The marker placed at the Right Lower Ball Joint or a location that defines a point on the Right Kingpin axis. The Z axis of the marker points to the Right Upper Ball Joint or a point that defines a point on the kingpin axis.

Marker Z axis is used for Caster and Kingpin Inclination calculations for the right side of the vehicle.

mrk_gnd_frnt.l.id

The ID of the Left Front Wheel Center Marker on body “ground”. The Marker is on the ground body at the Left Wheel Center location. The marker Z axis is parallel to the Global Z axis and the marker X axis is parallel to the global X axis.

Marker is used for the left Wheel displacement control system and left wheel center displacement calculations in the SDF routine.

mrk_gnd_frnt.r.id

The ID of the Right Front Wheel Center Marker on body “ground”. The Marker is on the ground body at the Right Wheel Center location. The marker Z axis is parallel to the Global Z axis and the marker X axis is parallel to the global X axis.

Marker is used for the right Wheel displacement control system and right wheel center displacement calculations in the SDF routine.

frc_frnt_jack.l.i.id

I Marker ID of the Left Front Force between the Jack and ground that is used to actuate the left wheel suspension motion.

Forces are used for the SDF subroutine calculations and the force reported by the SDF routine.  The I and J marker ID’s are required to recover the correct force.

frc_frnt_jack.r.i.id

I Marker ID of the Right Front Force between the Jack and ground that is used to actuate the left wheel suspension motion.

Forces are used for the SDF subroutine calculations and the force reported by the SDF routine.  The I and J marker ID’s are required to recover the correct force.

frc_frnt_jack.l.j.id

J Marker ID of the Left Front Force between the Jack and ground that is used to actuate the Left wheel suspension motion.

Forces are used for the SDF subroutine calculations and the force reported by the SDF routine.  The I and J marker ID’s are required to recover the correct force.

frc_frnt_jack.r.j.id

J Marker ID of the Right Front Force between the Jack and ground that is used to actuate the Right wheel suspension motion.

Forces are used for the SDF subroutine calculations and the force reported by the SDF routine.  The I and J marker ID’s are required to recover the correct force.

b_str_dummy.cm.id

Steering Dummy Body Center of Mass ID number. The Center of mass marker for the dummy body attached to the steering rack.

Not used by the current subroutine but kept in the software to maintain compatibility with ADAMS simulations.

The value is set to zero for rear suspension since they have no steering.

Name

Description

Front Patch Force

This is an Action Only force pair applied at the front wheels contact patch with the wheel patch marker as reference to simulate longitudinal, lateral, and aligning forces.

The forces for each direction are defined using expressions as listed below.

Fx - Left

`SHF(time,60,{ds_knc.max_lon_frc_front.value},0.1*PI,0,0)*

STEP(TIME,60,0,60.01,1)*STEP(TIME,79.9,1,80,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.1PI between 60 to 80 seconds.

Fy - Left

`SHF(time,20,{ds_knc.max_lat_frc_front.value},0.2*PI,0,0)*

STEP(TIME,20,0,20.01,1)*STEP(TIME,39.9,1,40,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 20 to 40 seconds.

Fz – Left

0

Tx – Left

0

Ty – Left

0

Tz – Left

`SHF(time,40,{ds_knc.max_algn_tor_fr.value},0.2*PI,0,0)*

STEP(TIME,40,0,40.01,1)*STEP(TIME,59.9,1,60,0)`

The expression contains a simple harmonic function that applies a sinusoidal torque input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 40 to 60 seconds.

Fx - Right

`SHF(time,60,{ds_knc.max_lon_frc_front.value},0.1*PI,0,0)*

STEP(TIME,60,0,60.01,1)*STEP(TIME,79.9,1,80,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.1PI between 60 to 80 seconds.

Fy - Right

`SHF(time,20,{ds_knc.max_lat_frc_front.value},0.2*PI,0,0)*

STEP(TIME,20,0,20.01,1)*STEP(TIME,29.9,1,30,0)-SHF(time,30,{ds_knc.max_lat_frc_front.value},0.2*PI,0,0)*

STEP(TIME,30,0,30.01,1)*STEP(TIME,39.9,1,40,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 20 to 40 seconds.  For the first 10 seconds between 20 – 30 seconds, the force is positive Y direction and vice-versa for the next 10 seconds.  This is done to simulate parallel and opposing lateral forces with respect to the left wheel.

Fz – Right

0

Tx – Right

0

Ty – Right

0

Tz – Right

`SHF(time,40,{ds_knc.max_algn_tor_fr.value},0.2*PI,0,0)*

STEP(TIME,40,0,40.01,1)*STEP(TIME,49.9,1,50,0)-SHF(time,50,{ds_knc.max_algn_tor_fr.value},0.2*PI,0,0)*

STEP(TIME,50,0,50.01,1)*STEP(TIME,59.9,1,60,0)`

The expression contains a simple harmonic function that applies a sinusoidal torque input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 40 to 60 seconds.  For the first 10 seconds between 40 – 50 seconds, the torque is in the same direction as the left wheel and opposite to it for the next 10 seconds.  This is done to simulate parallel and opposing aligning torques with respect to the left wheel.

Rear Patch Force

This is an Action Only force pair applied at the rear wheels contact patch with the wheel patch marker as reference to simulate longitudinal, lateral and aligning forces.

The forces for each direction are defined using expressions as listed below.

Fx - Left

`SHF(time,60,{ds_knc.max_lon_frc_front.value},0.1*PI,0,0)*

STEP(TIME,60,0,60.01,1)*STEP(TIME,79.9,1,80,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.1PI between 60 to 80 seconds.

Fy - Left

`SHF(time,20,{ds_knc.max_lat_frc_front.value},0.2*PI,0,0)*

STEP(TIME,20,0,20.01,1)*STEP(TIME,39.9,1,40,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 20 to 40 seconds.

Fz – Left

0

Tx – Left

0

Ty – Left

0

Tz – Left

`SHF(time,40,{ds_knc.max_algn_tor_fr.value},0.2*PI,0,0)*

STEP(TIME,40,0,40.01,1)*STEP(TIME,59.9,1,60,0)`

The expression contains a simple harmonic function that applies a sinusoidal torque input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 40 to 60 seconds.

Fx - Right

`SHF(time,60,{ds_knc.max_lon_frc_front.value},0.1*PI,0,0)*

STEP(TIME,60,0,60.01,1)*STEP(TIME,79.9,1,80,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.1PI between 60 to 80 seconds.

Fy - Right

`SHF(time,20,{ds_knc.max_lat_frc_front.value},0.2*PI,0,0)*

STEP(TIME,20,0,20.01,1)*STEP(TIME,29.9,1,30,0)-SHF(time,30,{ds_knc.max_lat_frc_front.value},0.2*PI,0,0)*

STEP(TIME,30,0,30.01,1)*STEP(TIME,39.9,1,40,0)`

The expression contains a simple harmonic function that applies a sinusoidal force input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 20 to 40 seconds.  For the first 10 seconds between 20 – 30 seconds, the force is positive Y direction and vice versa for the next 10 seconds.  This is done to simulate parallel and opposing lateral forces with respect to the left wheel.

Fz – Right

0

Tx – Right

0

Ty – Right

0

Tz – Right

`SHF(time,40,{ds_knc.max_algn_tor_fr.value},0.2*PI,0,0)*

STEP(TIME,40,0,40.01,1)*STEP(TIME,49.9,1,50,0)-SHF(time,50,{ds_knc.max_algn_tor_fr.value},0.2*PI,0,0)*

STEP(TIME,50,0,50.01,1)*STEP(TIME,59.9,1,60,0)`

The expression contains a simple harmonic function that applies a sinusoidal torque input, whose value is defined in the KnC Parameter DataSet, at a frequency of 0.2PI between 40 to 60 seconds.  For the first 10 seconds between 40 – 50 seconds, the torque is in the same direction as the left wheel and opposite to it for the next 10 seconds.  This is done to simulate parallel and opposing aligning torques with respect to the left wheel.

Jack Actuation - Front

This is an ActionReaction force pair which acts on the jack and is reacted on ground in the vertical direction.  The force is a DIF() that points to the SolverDiff ID’s for the Left Front jack and Right Front Jack for the left and right respectively.

When the DIF is evaluated during statics and quasi-statics, the derivative of the Solver Differential Equation is set to zero.  The result is that a Force is generated by the DIF that forces the measured wheel displacement to follow the command wheel displacement.

Jack Actuation - Rear

This is an ActionReaction force pair which acts on the jack and is reacted on ground in the vertical direction.  The force is a DIF() that points to the SolverDiff ID’s for the Left Rear jack and Right Rear Jack for the left and right respectively.

Jack Dummy Fixed - Front

Fixed joint that attaches the front knuckle to the dummy body front and is located at the front wheel center.

Jack Dummy Fixed - Rear

Fixed joint that attaches the rear knuckle to the dummy body rear and is located at the rear wheel center.

Vehicle Body fixed to ground

Fixed joint that attached the vehicle body to the ground body and is located at the vehicle body cg.

Rack Dummy Ball

Ball joint that connects the rack to the steering dummy body when a rack and pinion steering is used.

Steering motion

Steering wheel motion is used to hold the steering wheel during all phases of the event except during the steer input phase.

The motion is defined using the expression:

`-SHF(time,80,{ds_knc.str_angle.value}D,0.2*PI,0,0)*STEP(TIME,80,0,80.01,1)`

The expression defines a sinusoidal input at the steering wheel, with the value of steering angle being defined in the KnC Parameter DataSet, and has a frequency of 0.2PI.

Front wheel motion

Wheel spindle motion provides the lock between the front wheel and the front spindle and prevents the wheel and tire from rotating.

Rear wheel motion

Wheel spindle motion provides the lock between the rear wheel and the rear spindle and prevents the wheel and tire from rotating.

Front left wheel reaction

Measures and records output for the force at the Front inplane joint-left in the global reference frame.

Front right wheel reaction

Measures and records output for the force at the Front inplane joint-right in the global reference frame.

Rear left wheel reaction

Measures and records output for the force at the rear inplane joint-left in the global reference frame.

Rear right wheel reaction

Measures and records output for the force at the rear inplane joint-right in the global reference frame.

Wheel center height – left front

Measures and outputs the displacement between left front wheel and the left front jack in the global reference frame.

Wheel center height – right front

Measures and outputs the displacement between right front wheel and the right front jack in the global reference frame.

Wheel center height – left rear

Measures and outputs the displacement between left rear wheel and the left rear jack in the global reference frame.

Wheel center height – right rear

Measures and outputs the displacement between right rear wheel and the right rear jack in the global reference frame.

WC displacement – left front

Measures and outputs the displacement between the left front wheel and the ground body in the wheel center marker reference frame.

WC displacement – right front

Measures and outputs the displacement between the right front wheel and the ground body in the wheel center marker reference frame.

WC displacement – left rear

Measures and outputs the displacement between the left rear wheel and the ground body in the wheel center marker reference frame.

WC displacement – right rear

Measures and outputs the displacement between the right rear wheel and the ground body in the wheel center marker reference frame.

Applied TP force – left front

Measure and outputs the force at the left front tire contact patch in the global reference frame.

Applied TP force – right front

Measure and outputs the force at the right front tire contact patch in the global reference frame.

Applied TP force – left rear

Measure and outputs the force at the left rear tire contact patch in the global reference frame.

Applied TP force – right rear

Measure and outputs the force at the right rear tire contact patch in the global reference frame.

Roll Angle / Track width - Front

F2 - Computes the roll angle at the front using the expression:

`(ATAN(DZ({b_frnt_whl.l.cm.idstring}, {b_frnt_whl.r.cm.idstring},{MODEL.Global_Frame.idstring} ){solvercr}/DY({b_frnt_whl.l.cm.idstring}, {b_frnt_whl.r.cm.idstring}, {MODEL.Global_Frame.idstring})))*RTOD`

F3 – Computes the track width at the front using the expression:

`-DY({m_whl_patch_front.l.idstring},{m_whl_patch_front.r.idstring})`

Roll Angle / Track width - Rear

F2 - Computes the roll angle at the rear using the expression:

`(ATAN(DZ({b_rear_whl.l.cm.idstring}, {b_rear_whl.r.cm.idstring},{MODEL.Global_Frame.idstring} ){solvercr}/DY({b_rear_whl.l.cm.idstring}, {b_rear_whl.r.cm.idstring}, {MODEL.Global_Frame.idstring})))*RTOD`

F3 – Computes the track width at the rear using the expression:

`-DY({m_whl_patch_rear.l.idstring},{m_whl_patch_rear.r.idstring})`

Caster/Kingpin inclination – left front

F2 (Caster):

`(AY({mrk_kp_frnt.l.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

F3(Kingpin):

`-(AX({mrk_kp_frnt.l.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

Caster/Kingpin inclination – right front

F2 (Caster):

`(AY({mrk_kp_frnt.r.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

F3(Kingpin):

`-(AX({mrk_kp_frnt.r.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

Caster/Kingpin inclination – left rear

F2 (Caster):

`(AY({mrk_kp_rear.l.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

F3(Kingpin):

`-(AX({mrk_kp_rear.l.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

Caster/Kingpin inclination – right rear

F2 (Caster):

`(AY({mrk_kp_rear.r.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

F3(Kingpin):

`-(AX({mrk_kp_rear.r.idstring}, {MODEL.Global_Frame.idstring}))*RTOD`

{if (ana_fullveh_knc.ds_vehpar.tire_type.strval == "replace with vertical springs")}

<Deactivate

 element_type = "GFORCE"

 element_id = "{force_front_tire.l.idstring}"

/>

<Deactivate

 element_type = "GFORCE"

 element_id = "{force_front_tire.r.idstring}"

/>

<Deactivate

 element_type = "GFORCE"

 element_id = "{force_rear_tire.l.idstring}"

/>

<Deactivate

 element_type = "GFORCE"

 element_id = "{force_rear_tire.r.idstring}"

/>

{endif}

The IF condition turns deactivates all tire forces when the option for tire type in the Vehicle Parameters DataSet is set to “replace with vertical springs”.

<Deactivate        

 element_type = "MOTION"

 element_id  = "{spindle_motion_fr.l.idstring}"

/>

<Deactivate        

 element_type = "MOTION"

 element_id  = "{spindle_motion_fr.r.idstring}"

/>

<Deactivate        

 element_type = "MOTION"

 element_id  = "{spindle_motion_rear.l.idstring}"

/>

<Deactivate        

 element_type = "MOTION"

 element_id  = "{spindle_motion_rear.r.idstring}"

/>

These four set of deactivate statements turn OFF the front and rear wheel motions that have been locking the wheels from moving.

 <Simulate

   analysis_type       = "Static"

   end_time            = "20"

   print_interval      = "0.1"

/>

Performs a static simulation for 20 secs.

<Activate

 element_type = "MOTION"

 element_id  = "{spindle_motion_fr.l.idstring}"

/>

<Activate

 element_type = "MOTION"

 element_id  = "{spindle_motion_fr.r.idstring}"

/>

<Activate

 element_type = "MOTION"

 element_id  = "{spindle_motion_rear.l.idstring}"

/>

<Activate

 element_type = "MOTION"

 element_id  = "{spindle_motion_rear.r.idstring}"

/>  

These four Activate statements turn ON the front and rear wheel motions in readiness for the second static simulate instruction block.

<ResOutput

     plt_angle           = "YAW_PITCH_ROLL"

/>

<ResOutput

     mrf_file            = "TRUE"

/>

<ResOutput

     plt_file            = "TRUE"

/>

<H3DOutput

     switch_on           = "TRUE"

     increment           = "1"

/>

<ResOutput

     abf_file            = "TRUE"

/>

The output block defines the result format and the files that the solver needs to generate.

<Simulate

     analysis_type       = "Static"

     end_time            = "90"

     print_interval      = "0.1"

/>

Performs a static simulation until 90 secs.