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AeroSusp v4

3d suspension geometry and kinematics analysis

AeroSusp is for use by designers creating suspension systems from scratch and by race engineers tuning existing systems. It is based on mature code that has been in widespread use in top level race teams in many categories for over 15 years.

AeroSusp has been carefully designed from the start to avoid the pitfalls of over-complicated user interface design that other suspension design products have fallen into.

Typically you can be productive with it within a few minutes of starting.

Example screenshots of some of the many output views available - click for a bigger picture

Major features

     Professionally designed for ease-of-use and powerful functionality

  • High quality user interface complying with the MS Windows User Interface Guidelines means you can be productive in the shortest time.

  • On-line Help system means that information is always to hand.

  • Combines exceptional usability with a rich feature set.

  • Command line automation for batch running in external workflows

     Models most common double wishbone suspension configurations, including:

  • Wishbones and track rod but no springing system (for wheel control behaviour only).

  • Inboard spring actuated by pushrod or pullrod via rocker.

  • Pushrod or pullrod connected to wishbone or direct to upright.

  • 2nd rocker in series with first.

  • Outboard spring.

  • Inboard spring actuated by top wishbone beam rocker.

Driveshafts and anti-roll bars can also be modelled.

     Steers and heaves suspension over a full range automatically

  • The suspension can be moved into bump and droop with your choice of step.

  • You can also choose to steer over a range of rack positions for each heave position.

  • Results for all heave and rack positions are always available, removing the need to move the suspension into a position of interest.

  • You can view results against a range of rack or wheel travel, or at a particular combination of travels.

     Over 40 geometry channels output depending on the suspension type, including:

  • Anti-dive, -squat and -roll angles and %

  • Ackerman length, half track, roll-centre heights from origin and ground.

  • Bump steer, camber angle, castor angle, kingpin inclination, scrub radius, trail.

  • Force ratio, spring length, wheel rate and wheel rate % change due to spring only, wheel rate due to spring + tire + installation stiffness.

  • And more...

     Wide choice of results displays

  • There are a number of pre-formatted tables showing useful groups of results channels against wheel travel

  • All output channels can be plotted as auto-scaled graphs against wheel travel.

  • You can draw the suspension as a set of 3d views.

  • Any display can be printed with full print preview, or you can define your own set of tables to print.

     Link loads for stressing calculations

  • You can view tables of loading coefficients defining coupling between contact patch loads and tension/compression loads in wishbone and pushrod/pullrod links.

  • You can define load cases for contact patch loads. The resultant combined loads are automatically calculated for the links.

  • This feature highlights potential problems with highly loaded links, and directs your attention to the most critical parts.

     Dynamics report

  • AeroSusp can create a simple dynamic report giving ride height change under acceleration or braking, including the effects of tire compression, suspension member installation stiffness and anti-dive or squat, as well as the basic spring rate.

     Suspension lengths and positions in bump and droop

  • A report showing the lengths of all suspension links is created, making it easy to check the accuracy of measurements made on an existing suspension.

  • The wheel is moved up and down and and steered from the original position, and the new coordinates of all points found.

     Automatic curve fitting for key channels against wheel travel

  • A quadratic curve fit is applied to several channels. The results can be used in calibrating displacement measurements in the data acquisition, or as input data for other programs such as simulations.

     Other features

  • You can work in either US/Imperial or Metric units, with sensible defaults set for both systems.

  • Tables can be exported in ASCII format, for use in other applications.

Planned features

This program is currently under continuous development. If you are particularly interested in a feature not currently implemented please contact Ansible Design for further information.




Integration with AeroLap
AeroSusp can produce suspension data files that can be read directly by AeroLap v4.
AeroSusp can be batch run through command line automation.