General Driver Event Settings

Initial Static and Steering Ratio

Initial Static and steering ratio settings are available under all Driver events except the n-Post, KnC, and other events under the General section. These settings are useful when a vehicle model does not achieve static equilibrium while solving.
Static Equilibrium
A model can fail in Static simulation for various reasons. The most common of these reasons are:
  1. The initial position of the vehicle is on a non-flat surface.
  2. The model is not tuned to have its equilibrium position close to the model/design position.
  3. The model is unstable by design (Two wheeler).

To circumvent the Static solution problem, you can now choose to skip the initial Static simulation for the Driver events.

Steering Ratio Estimation
In addition to the initial static, the Driver control subroutine also runs two additional Static simulations. These are used to determine the overall steering ratio. The overall steering ratio is the ratio of steering wheel rotation to that of the average wheel steer (toe) angle.

In those models where the steering control is used from an external source or if the model is rear axle/all axle steered, the steering ratio calculation by the Driver is not desired. In such cases, this option can be set to False, and you can enter the ratio in the Entity Editor manually.

The following parameters are available in this section of the Entity Editor:
Option Function Value Type
Run initial static Allows you to skip the Static simulations before the Transient. Boolean (default = True)
Compute steering ratio Allows you to skip the steering ratio calculation steps before the Transient. Boolean (default = True)
Steering ratio If you choose to skip the steering ratio calculation step, Driver needs the steering ratio value to use. This value is the ratio of steering wheel rotation to that of the average wheel steer (toe) angle. Real (default = 16.0)

Simulation Settings

Every full vehicle event has its own simulation settings. These are listed under Simulation Settings section in the Entity Editor. These settings are specific to the event.
Analysis Parameters
Under Analysis Parameter you will find the following options:
Option Function Value Type
Print Interval Time interval between consecutive output steps for plotting and animation output. Real (default = 0.01)
Real-Time Compliant Write real-time flag in the solver deck. Boolean (default = False)

Analysis Parameters → Advanced: Refer to Parameters: Simulation in the MotionSolve documentation for details on these parameters.

Dynamic Settings
Refer to Parameters: Transient Solver in the MotionSolve Transient Solver documentation for details on these parameters.
Static Settings
Refer to Parameters: Static Solver in the MotionSolve Static Solver documentation for details on these parameters.

Jupyter Report Template

This section has references to the Jupyter report templates associated with the event. For additional details on Jupyter Reports, refer to Jupyter Reports for Full Vehicles and Suspension Analyses.