Hi,
I am wondering if the angular momentum is correctly calculated in the mechanism module.
I am wondering this because when I spin a disk through it center axis (this part is the only moving part see figure below) the angular momentum reported for the system is different when changing the location of the spinning disk in the global coordinate system.
When checking the results analytically the calculations are correct when the disk center coincides with the global y-axis.
The angular momentum about the origin (H_o) should be calculated as the angular momentum about the center of gravity (H_g) plus the center of gravity position vector (r_g) cross the velocity of the center of gravity (V_g) times the mass (m):
H_o=H_g + (r_g x V_g)m
Since the velocity of the center of gravity (V_g) is zero, the second term vanishes. Hence the angular momentum reported should be constant no matter the center of the spinning disk.
Anyone getting the same results?
Best regards,
Joel Johansson
