What Is The Coordinate Sign Convention for Vehicle Dynamics

'What Is' type questions related to highway safety, accident reconstruction and vehicle simulation
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MSI
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What Is The Coordinate Sign Convention for Vehicle Dynamics

Post by MSI »

The Coordinate Sign Convention for Vehicle Dynamics as follows:
  • X forward,
  • Y to the right,
  • Z down (towards the earth as in Positive Gravity)
The HVOSM and SMAC programs use the same conventions.
When HVOSM was first developed in the late 60s space travel was on the rise so they wanted a general purpose program that could simulate in near zero gravity (HVOSM can still do that! since Gravity is an input)
So Ray used flight conventions for coordinates
Flight conventions:
Flight coordinate conventions.jpg
Flight coordinate conventions.jpg (25.72 KiB) Viewed 123 times
This was from
Dynamics of Flight.jpg
Dynamics of Flight.jpg (7.79 KiB) Viewed 123 times
The SAE Coordinate Conventions are the same as for flight:
SAE Coordinate Conventions.jpg
SAE Coordinate Conventions.jpg (18.1 KiB) Viewed 123 times
Here is the HVOSM Coordinates:
HVOSM Coordinates.jpg
HVOSM Coordinates.jpg (36.89 KiB) Viewed 123 times
NOTE: Some programs use Cartesian Coordinates.
Like the screen you are reading this on.
X goes across, Y goes UP, and Z comes out at you.
Cartesian Coordinates.jpg
Cartesian Coordinates.jpg (11.17 KiB) Viewed 123 times
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