Joint Reaction Force Spikes

Maxine Olson · Post by **Maxine Olson** » Wed Dec 18, 2024 10:03 am

Hi Everyone,

I have an issue that I haven't been able to find on the forum. I am running a joint reaction force analysis. I have a custom multi-segment foot model. I have run IK, RRA, and static opt. I am using those outputs along with multiple GRF vectors as input for the joint reaction analysis. My output of the joint reaction analysis has several cells time points that are -nan and others that are spiking to the E280 magnitude. Has anyone encountered this before.

I have checked all the input files and they are reasonable smooth curves. I have filtered the IK data when running the RRA. When I run inverse dynamics the output looks reasonable.

Any ideas?