Search found 20 matches

by ZHONG WEI
Thu Jun 10, 2021 5:02 am
Forum: OpenSim
Topic: Muscle reaches 100% activation in walking and don't why - SO and RRA
Replies: 4
Views: 747

Re: Muscle reaches 100% activation in walking and don't why - SO and RRA

Hello,friends
Have you solved the problem yet? I am currently going through the same issue and I use Rajagopal2015.osim. Are there criteria for modify if need to change max_isometric_force values?
Best regards!
WEI
by ZHONG WEI
Wed Jun 09, 2021 9:11 pm
Forum: OpenSim
Topic: Activation in Estimating_Joint_Reaction_Loads example
Replies: 0
Views: 108

Activation in Estimating_Joint_Reaction_Loads example

Hello,everyone! I performed static optimization using other model and found that some muscles had an activation of 1.Then I reviewed the reference results of the tutorial(Estimating_Joint_Reaction_Loads), and the same thing happened. here are the result of tutorial(show in image1). Is it normal? How...
by ZHONG WEI
Sun Jun 06, 2021 1:37 am
Forum: OpenSim
Topic: Static optimization (activation)
Replies: 3
Views: 420

Re: Static optimization (activation)

Activation is between 0 and 1. For details, please see the "Muscle Model Theory and Publications" section of the documentation and the papers listed there: https://simtk-confluence.stanford.edu/display/OpenSim/Muscle+Model+Theory+and+Publications . Thank you very much, I have a general idea of musc...
by ZHONG WEI
Sun Jun 06, 2021 1:29 am
Forum: OpenSim
Topic: Static Optimization (activation reach 1 and stays there for some time)
Replies: 1
Views: 300

Re: Static Optimization (activation reach 1 and stays there for some time)

Hello, I argue that whether activations reach 1 and stays there for some time associates with muscle weak. I also confuse that how can I know muscle weak and what should I do to strenghthen it?(show in image.docx ) Should I change the max_isometric_force? If the answer is yes, what is the normal? Ba...
by ZHONG WEI
Sat Jun 05, 2021 3:41 am
Forum: OpenSim
Topic: Static Optimization (activation reach 1 and stays there for some time)
Replies: 1
Views: 300

Static Optimization (activation reach 1 and stays there for some time)

Hello, everyone; When I use the model(Rajagopal2015.osim) to perform SO, some muscle actvations in my Static Optimization result reach 1 and stays there for some time; Though I try to increase the value of optimal force of reserve and residual actuator, the result does not change. Is it normal? If n...
by ZHONG WEI
Sat Jun 05, 2021 3:29 am
Forum: OpenSim
Topic: Static optimization (activation)
Replies: 3
Views: 420

Re: Static optimization (activation)

Hi every one, I am wandering respect to what the activation of the muscles (Static optimization results ) are normalized too? Is it correct to assume that they are normalize to a parameter which rap represents the MVC? thank you in advance Hello, I have the same confusion. Did you figure it out? So...
by ZHONG WEI
Sat Jun 05, 2021 3:10 am
Forum: OpenSim
Topic: Static Optimization
Replies: 1
Views: 377

Re: Static Optimization

Hi every one, I have an upper body model, and I'm trying to do Static Optimization on Opensim Gui. When I load the .mot file, the actuators file and I launch the tool this error message appear: Assembly error tolerance achieved: 1.5203293311782939e-10 required: 1e-10. Model relaxing constraints and...
by ZHONG WEI
Thu Apr 22, 2021 6:37 am
Forum: OpenSim
Topic: Static Optimization:OPTIMIZATION FAILED
Replies: 0
Views: 135

Static Optimization:OPTIMIZATION FAILED

Hello,
When I execute SO, the following problems occur. How to solve it?
Thanks
by ZHONG WEI
Wed Apr 21, 2021 6:22 am
Forum: OpenSim
Topic: Estimate_Joint_Reaction
Replies: 0
Views: 133

Estimate_Joint_Reaction

hello,
When I perform operation in the tutorial video, Example - Estimating Joint Reaction Loads , the following warning message(show blow picture) appeared in the message window.I want to know what this means and how can I fix it.
thanks
by ZHONG WEI
Sat Apr 03, 2021 9:00 pm
Forum: OpenSim
Topic: Scale problem
Replies: 0
Views: 140

Scale problem

hello!
I am in trouble when I perform Scale Tool. Thongh I changed the parameters(showed file blow),the scale model is still the same.
I want to know how do I change the parameters so that the model can change with the parameters.
Thanks!