Position error using a Joint
Posted: 16 May 2014, 11:02
Hi Admin,
I have one more question about the joint.
In my current project, I have to simulate an actuation system with motor, axis and cylinder. The cylinder has a mass about 250-350kg.
I have noticed that, during the simulation, it occurs some position errors on the entity, which belongs to the child of Joint. And the error values are different between Bullet and Vortex, as I have seen in Vortex much more bigger. Otherwise, the errors DURING the simulation also influence the positions/orientations AFTER the simulation. That means, the positions/orientations of entities change themselves.
I've tried with some different weights of cylinder, for example extreme heavy: 10000kg.
1, visually I can see is that, in Vortex the blue part of Joint would dropping down a little bit, which has nothing happened in Bullet.
2, the error values raised up in both engines when the cylinder is heavier.
3, the error value in Vortex is always bigger that in Bullet.
I've also checked the Engine Properties of Joint, but it sees all values "infinity".
Because in my simulation the actuation system is more complicated than such a simple combination with "Cuboid-Joint-Cylinder". So I have noticed that the position errors of entities are already big enough, which are dangerous and not good for my simulation result and verification.
Cheers,
Ji
I have one more question about the joint.
In my current project, I have to simulate an actuation system with motor, axis and cylinder. The cylinder has a mass about 250-350kg.
I have noticed that, during the simulation, it occurs some position errors on the entity, which belongs to the child of Joint. And the error values are different between Bullet and Vortex, as I have seen in Vortex much more bigger. Otherwise, the errors DURING the simulation also influence the positions/orientations AFTER the simulation. That means, the positions/orientations of entities change themselves.
I've tried with some different weights of cylinder, for example extreme heavy: 10000kg.
1, visually I can see is that, in Vortex the blue part of Joint would dropping down a little bit, which has nothing happened in Bullet.
2, the error values raised up in both engines when the cylinder is heavier.
3, the error value in Vortex is always bigger that in Bullet.
I've also checked the Engine Properties of Joint, but it sees all values "infinity".
Because in my simulation the actuation system is more complicated than such a simple combination with "Cuboid-Joint-Cylinder". So I have noticed that the position errors of entities are already big enough, which are dangerous and not good for my simulation result and verification.
Cheers,
Ji