Stefan, Your question is not very well posed. That frame simply locates the suspension subsystem on the chassis and is not associated with any particular body in the suspension assembly. As such, it represents a point that is always fixed on the vehicle chassis. If you want to find the linear velocity of that point (which is, again, rigidly moving with the chassis body), you can find it using the function PointSpeedLocalToParent on the chassis body which will return the velocity vector at that point expressed in the chassis body local frame which you can then further express in the global frame. The angular velocity of that point will be the angular velocity of the chassis body.
If you are interested in the velocity of specific bodies in the suspension assembly, you can access those, but that is specific to a particular suspension template (all suspensions only guarantee they will have two spindle bodies, left and right; beyond that each suspension type has its own topology and set of bodies). --Radu From: [email protected] <[email protected]> On Behalf Of stefan Sent: Friday, 25 November 2022 11:17 To: ProjectChrono <[email protected]> Subject: [chrono] How to get the speed and acceleration of vehicle based on the rear suspension frame Hello, I want to get the global and local speed based on the rear suspension frame, just like the frame o'' in the picture attached. Can I get the ChBodyAuxRef class of rear suspension frame like chassis body, in this way I can get the global and local speed based on the rear suspension frame. -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]<mailto:[email protected]>. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/06e5b08d-2cd2-4269-bd35-2f3170112dbdn%40googlegroups.com<https://groups.google.com/d/msgid/projectchrono/06e5b08d-2cd2-4269-bd35-2f3170112dbdn%40googlegroups.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/PH0PR06MB82375B83EF4C4D1EE8AD2A50A7119%40PH0PR06MB8237.namprd06.prod.outlook.com.
