Search found 7 matches

by Alexander Bruno
Wed Feb 12, 2014 8:52 pm
Forum: OpenSim
Topic: Coordinate Constraint Influences Static Optimization Results
Replies: 3
Views: 1417

Re: Coordinate Constraint Influences Static Optimization Res

Thank you Ton and James! That cleared some things up.

-Alex
by Alexander Bruno
Mon Feb 10, 2014 8:08 am
Forum: OpenSim
Topic: Crashes During Joint Reaction Analyis
Replies: 10
Views: 7165

Re: Crashes During Joint Reaction Analyis

In case anyone is still interested, I think this is a memory issue in MatLab. When using the AnalyzeTool in a loop, I clear the model object and AnalyzeTool object from the workspace at the end of each loop iteration, and that seems to fix the issue.

-Alex
by Alexander Bruno
Fri Feb 07, 2014 12:51 pm
Forum: OpenSim
Topic: Coordinate Constraint Influences Static Optimization Results
Replies: 3
Views: 1417

Coordinate Constraint Influences Static Optimization Results

Hi Everyone, I'm trying to understand how the presence of a coordinate coupled constraint in a model factors into the static optimization analysis. I've been using the Lumbar 210 spine model, which uses a coordinate coupled constraint to specify the amount of rotation of each intervertebral joint as...
by Alexander Bruno
Tue Feb 04, 2014 7:33 am
Forum: OpenSim
Topic: Crashes During Joint Reaction Analyis
Replies: 10
Views: 7165

Re: Crashes During Joint Reaction Analyis

I am having the same problem as Erik. When I run Static Optimization (the AnalyzeTool) in a loop in MatLab, MatLab closes after the second iteration. At the end of each loop I added a line to clear the model from the workspace, and this allowed Matlab to get through about 6 iterations of the loop, b...
by Alexander Bruno
Fri Jan 31, 2014 10:32 am
Forum: OpenSim
Topic: Running Static Optimization in Matlab?
Replies: 15
Views: 6561

Re: Running Static Optimization in Matlab?

Thanks James, that did the trick. It seems to be working for me now.

-Alex
by Alexander Bruno
Thu Jan 30, 2014 5:49 pm
Forum: OpenSim
Topic: Running Static Optimization in Matlab?
Replies: 15
Views: 6561

Re: Running Static Optimization in Matlab?

Hi James, I'm also trying to run a Static Optimization Analysis via MatLab scripting. In particular, I'm not sure how to get the 'states' argument that needs to be passed through begin(), step(), and end(). For instance, if I was to run a static optimization analysis using a .mot file, I know how to...
by Alexander Bruno
Tue Jan 24, 2012 3:53 pm
Forum: OpenSim
Topic: Stat. Opt. muscles show no activation
Replies: 2
Views: 547

Re: Stat. Opt. muscles show no activation

Hi Adila,

I'm having these same issues with the lumbar-238 model, ie: minimum muscle activation for 40 degrees of forward flexion. Did you ever find a solution?

Thanks,
Alex