Enforcement of constraints
Posted: Wed Mar 20, 2013 5:02 pm
Hi all,
I just have a question regarding the use of custom joints with reduced dofs vs weld constraints vs locked coordinates. I was wondering if there is any practical difference between these options?
I am currently running a forward simulation in the OpenSim API with a number of coordinates being locked and the simulation takes considerably longer than if I omitted the dofs within a custom joint. I was wondering if you could explain what influence these additional locked dof's will have computationally?
In addition, should a coordinate remain constant when the forward simulation runs if it is locked? When I look at my results it seems that a constant value is not enforced throughout the simulation. Can you recommend the best practice for this type of issue on a one off case? Is it better to include only the necessary dofs or be general (6 dofs) and include locked or constrained dofs?
Thanks
Tom
I just have a question regarding the use of custom joints with reduced dofs vs weld constraints vs locked coordinates. I was wondering if there is any practical difference between these options?
I am currently running a forward simulation in the OpenSim API with a number of coordinates being locked and the simulation takes considerably longer than if I omitted the dofs within a custom joint. I was wondering if you could explain what influence these additional locked dof's will have computationally?
In addition, should a coordinate remain constant when the forward simulation runs if it is locked? When I look at my results it seems that a constant value is not enforced throughout the simulation. Can you recommend the best practice for this type of issue on a one off case? Is it better to include only the necessary dofs or be general (6 dofs) and include locked or constrained dofs?
Thanks
Tom