For the Vehicle Body 3 DOF block in the Vehicle Dynamics Blockset, I’ve configured it to run in single track mode. The documentation includes equations for drag forces under the dual track section, but not the single track section, which led me to believe that the drag forces are only relevant for the dual track block.
This does not seem to be the case, as I’m observing the drag forces in the output of the single track block to be nonzero. It makes sense that drag would be accounted for in both single track and dual track modes, but why then are the drag forces only described in the dual track equations?
Furthermore, the single track documentation does mention drag forces, saying that external forces = drag forces + input forces:

But then when I observe the external body forces as output by the block, they are always 0 despite the drag forces being nonzero. Seems like there might be a term overload with "external forces" referring both to the external input forces as well as the drag + input combined force.

External force input:

What I thought would be the computed external force output (drag + input forces), but is always 0 when input force is 0:For the Vehicle Body 3 DOF block in the Vehicle Dynamics Blockset, I’ve configured it to run in single track mode. The documentation includes equations for drag forces under the dual track section, but not the single track section, which led me to believe that the drag forces are only relevant for the dual track block.
This does not seem to be the case, as I’m observing the drag forces in the output of the single track block to be nonzero. It makes sense that drag would be accounted for in both single track and dual track modes, but why then are the drag forces only described in the dual track equations?
Furthermore, the single track documentation does mention drag forces, saying that external forces = drag forces + input forces:

But then when I observe the external body forces as output by the block, they are always 0 despite the drag forces being nonzero. Seems like there might be a term overload with "external forces" referring both to the external input forces as well as the drag + input combined force.

External force input:

What I thought would be the computed external force output (drag + input forces), but is always 0 when input force is 0: For the Vehicle Body 3 DOF block in the Vehicle Dynamics Blockset, I’ve configured it to run in single track mode. The documentation includes equations for drag forces under the dual track section, but not the single track section, which led me to believe that the drag forces are only relevant for the dual track block.
This does not seem to be the case, as I’m observing the drag forces in the output of the single track block to be nonzero. It makes sense that drag would be accounted for in both single track and dual track modes, but why then are the drag forces only described in the dual track equations?
Furthermore, the single track documentation does mention drag forces, saying that external forces = drag forces + input forces:

But then when I observe the external body forces as output by the block, they are always 0 despite the drag forces being nonzero. Seems like there might be a term overload with "external forces" referring both to the external input forces as well as the drag + input combined force.

External force input:

What I thought would be the computed external force output (drag + input forces), but is always 0 when input force is 0: simulink, vehicle dynamics MATLAB Answers — New Questions

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