This section describes how to build events in the full vehicle model with Altair Driver. The new event user interface is supported only for models with Altair Driver. The interface exports .adf and .xml files and submits them to MotionSolve. Files can be edited or updated in the Event Editor. Eighteen event types are supported.
This section describes all of the full vehicle events currently supported with Altair Driver. It also describes all of
the events and their parameters.
A Constant radius event simulates a vehicle driving in a circular path, typically with increasing speed. The event predicts
the vehicles roll and understeer characteristics with increasing lateral acceleration.
A Double lane change event drives the vehicle through a lane change and a return to lane maneuver, attempting to follow
the centerline of the defined lane.
A Swept Sine event simulates a vehicle driving at a constant speed with a sinusoidal steering input of constant magnitude
but increasing frequency applied.
A J-turn event simulates a vehicle response to a large steer in one direction, a dwell time to allow the vehicle to react,
and a large steer in the opposite direction, with an additional reaction time.
A Throttle-off cornering event simulates the dynamics of a vehicle driving a constant radius turn at steady state and
the reaction of the vehicle due to a sudden removal of the drive torque while cornering.
A Throttle-off turn-in event simulates a vehicle driving straight at constant speed, turning on to a constant radius,
then after reaching steady state the throttle is closed and the steering is ramped to tighten the turn.
The Road Course Drive event can be used to simulate full vehicle models on the required road profile. The event also provides
a means to study vehicle performance in the areas of durability/fatigue and ride comfort.
The Stability Analysis event can be used to simulate two-wheeler models on various road surfaces to evaluate the weave
and wobble modes of the vehicle. A user-defined road property file determines the road input.
A Slalom event drives the vehicle in a straight, followed by a sequence of turns around cones in alternate directions.
The vehicle velocity is held constant.
Driver can be loaded using the Model Wizard of MDLLIB when the Full Vehicle with Driver option is chosen. Driver has
some special requirements to interface with the vehicle model. These requirements are resolved automatically if the
vehicle model is built using the Full vehicle with advanced driver option in the Model Wizard in MDLLIB.
This section describes all of the full vehicle events currently supported with Altair Driver. It also describes all of
the events and their parameters.
Three Joints are used to constrain the vehicle when the event is simulated.
Perpendicular Axes Joint between the Vehicle body and ground body. This is a static
simulation constraint, which is deactivated during the transient part of the
simulation.
Inline Joint between the Vehicle body and ground body. This is also a static
simulation constraint, which is deactivated during the transient part of the
simulation.
The Steering Wheel Joint is used to lock the steering wheel motion during the
simulation.
To stop vehicle drift, there is an option to add a Vehicle Restraint, which can be a
Bushing or a Fixed Joint. When the None option is selected, the vehicle will not be
constrained. The Bushing option has user-editable properties.
Attention: Once the posts are set up, you can click the ‘Assign
Signals’ button to add signals to each post.