Closed kinematic loops
Posted: Wed Jun 16, 2021 9:34 am
Hi All,
My project involves looking at how exoskeletons and the body interact. As part of this, I have produced a closed kinematic loop with the two chains connected by a point constraint at the ankle joint.
The model has built on the SCONE example 4a lower limb model and I was hoping that I would be able to use the same control system and weightings. However, when I attempt to load the updated model into SCONE it gives the following error:
Error creating resource: Invalid point constraint body1 () specified in Constraint PinL
I have double-checked and it looks like the point constraints are fully aligned and they don't produce any accuracy errors when running the model through the visualiser. Is this an issue with SCONE and it not liking point constraint/ closed kinematic loops? or is it more likely an issue with how the constraints are set up?
When opening the model within the OpenSim GUI it is acting as I would expect it to.
Best wishes,
Rory Turnbull
My project involves looking at how exoskeletons and the body interact. As part of this, I have produced a closed kinematic loop with the two chains connected by a point constraint at the ankle joint.
The model has built on the SCONE example 4a lower limb model and I was hoping that I would be able to use the same control system and weightings. However, when I attempt to load the updated model into SCONE it gives the following error:
Error creating resource: Invalid point constraint body1 () specified in Constraint PinL
I have double-checked and it looks like the point constraints are fully aligned and they don't produce any accuracy errors when running the model through the visualiser. Is this an issue with SCONE and it not liking point constraint/ closed kinematic loops? or is it more likely an issue with how the constraints are set up?
When opening the model within the OpenSim GUI it is acting as I would expect it to.
Best wishes,
Rory Turnbull