I was playing around with a simple 2D pedulum consisting of 4 bodies. I included one non-holonomic constraint on one of the rotational speeds. I also wanted to calculate the forces acting on the support of the pendulum, using KM.auxiliary_eqs. Now the ‚virtual speeds‘ needed to calculate the forces appeared in forces, calculated as usual forces = KM.forcing_full. Also their time derivatives appeared When I removed the speed constraint, the virtual forces and their time derivatives disappeared.
As the support by definition does not move, I simply set these virtual speed equal to zero. Is this correct, or how can I handle this situation properly? Thanks for any help!! -- You received this message because you are subscribed to the Google Groups "sympy" 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/sympy/a8e057fc-d05c-4c4b-9424-2a63b560fa41n%40googlegroups.com.
