• Skip to main content
  • Skip to search
  • Skip to footer
Cadence Home
  • This search text may be transcribed, used, stored, or accessed by our third-party service providers per our Cookie Policy and Privacy Policy.

  1. Community Forums
  2. Adams Car
  3. What would cause an error with "straight line" steering...

Following Cadence Design Systems’ acquisition of the Design & Engineering (D&E) business, the D&E Community Forum on the Nexus Community Center has been migrated in the Cadence Physical System Simulation Community. For more details and if you have any questions, please refer to the FAQ.

Stats

  • State Not Answered
  • Replies 3
  • Subscribers 1
  • Views 11
  • Members are here 0
More Content

What would cause an error with "straight line" steering input but not free/locked?

Jonathan Corno
Jonathan Corno over 6 years ago
error part 2
error part 1
When I run a straight line acceleration event using free or locked steering input, the event runs and the car performs as expected, but when I run the same event using straight line steering input, the event errors
  • Sign in to reply
  • Cancel
Parents
  • Jesper Slattengren
    0 Jesper Slattengren over 6 years ago
    With the straight line, you are introducing a feedback controller in the system. There are a lot of things that can go wrong.
    The most common is that the steering goes the wrong way. Verify in a suspension assembly that a positive steering motion is to the left and that the wheels actually turn to the left as well. If not else, reverse the direction of one of the couplers in the steering column.
     
    Second, verify in the full vehicle Setup Parameters that the steering ratio and rack ratio are set to proper values.
     
    If this still not work, you might have to work with the controller parameters in the event xml file. Use the event builder and load the event that was created automatically. Adjust the LatPth parameters first, that is usually enough.
    The default values are suitable for a sporty passenger car and absolutely unsuitable for a full-size truck or 6-wheeled 8 ton vehicle for example.
    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
Reply
  • Jesper Slattengren
    0 Jesper Slattengren over 6 years ago
    With the straight line, you are introducing a feedback controller in the system. There are a lot of things that can go wrong.
    The most common is that the steering goes the wrong way. Verify in a suspension assembly that a positive steering motion is to the left and that the wheels actually turn to the left as well. If not else, reverse the direction of one of the couplers in the steering column.
     
    Second, verify in the full vehicle Setup Parameters that the steering ratio and rack ratio are set to proper values.
     
    If this still not work, you might have to work with the controller parameters in the event xml file. Use the event builder and load the event that was created automatically. Adjust the LatPth parameters first, that is usually enough.
    The default values are suitable for a sporty passenger car and absolutely unsuitable for a full-size truck or 6-wheeled 8 ton vehicle for example.
    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.

© 2026 Cadence Design Systems, Inc. All Rights Reserved.

  • Terms of Use
  • Privacy
  • Cookie Policy
  • US Trademarks
  • Do Not Sell or Share My Personal Information