Search found 48 matches

by Linjie Wang
Mon Oct 02, 2023 1:57 am
Forum: OpenSim
Topic: How to turn off muscle physiology in Static Optimization
Replies: 0
Views: 137

How to turn off muscle physiology in Static Optimization

Hi, Can I ask how to turn off the use of muscle physiology during the static optimization please? I've tried both Api and GUI to toggle off the use of it, but I still constantly got the error message about some muscles unable to equilibrate. I'm using the latest version 4.4, not sure if this is the ...
by Linjie Wang
Wed May 09, 2018 6:07 am
Forum: OpenSim
Topic: the knee reaction force during squat
Replies: 0
Views: 166

the knee reaction force during squat

Hi, there. Can I ask if someone tested the human knee reacion force during squat or ever used he data from Grand Challenge Competition to Predict In Vivo Knee Loads? I want to use experiment data to compare with my FEA analysis result, but found the data (screenshot below) from Grand Challenge Compe...
by Linjie Wang
Sat Feb 17, 2018 4:21 am
Forum: OpenSim
Topic: the problem of recognising local frame during joint reaction analysis
Replies: 2
Views: 211

Re: the problem of recognising local frame during joint reaction analysis

My bad. I misunderstood the meaning. Thanks a lot, Tom! Thanks
by Linjie Wang
Fri Feb 16, 2018 10:26 am
Forum: OpenSim
Topic: the problem of recognising local frame during joint reaction analysis
Replies: 2
Views: 211

the problem of recognising local frame during joint reaction analysis

Hi, there. I am trying to use joint reaction analysis to get the ankle forces and moments. In the settings, there is one to input the frame name in 'express_in_frame'. However, whenever value, for instance, 'ankle_angle_l' or 'knee_angle_l' in the <Coordinate name=>, the output result always gave th...
by Linjie Wang
Fri Jul 14, 2017 7:44 am
Forum: OpenSim
Topic: the problem of applying Mesh Geometry to the non-conformity contact pair
Replies: 1
Views: 286

the problem of applying Mesh Geometry to the non-conformity contact pair

Hi, there. I want to use the mesh geometries of self designed total knee replacement (non-comformity) to predict knee forces. I have successfully calculated the Inverse Kinematics, Residual Reduaction Algorithm and Computed Muscle Control without consideration of mesh geometries. However, when it ca...
by Linjie Wang
Thu Jul 06, 2017 5:29 am
Forum: OpenSim
Topic: how to filter the EMG data from grand challenge competition to predict knee loads
Replies: 2
Views: 293

how to filter the EMG data from grand challenge competition to predict knee loads

Hi, there.

Anyone knows how to filter the EMG data? I saw some one mentioned the butter function in matlab. if so, which cutoff frequency and sampling frequency should I use?

Thanks,
Linjie
by Linjie Wang
Tue Jun 27, 2017 11:36 am
Forum: OpenSim
Topic: muscle length measure and its parameter setting
Replies: 6
Views: 576

Re: muscle length measure and its parameter setting

Hi, Chris.

Do you mind if I ask the journal paper that referred to the musculotendon parameters for the JW model as the linked paper you just sent? Unforunately I have tried to find it for a long time.

Many thanks,
Linjie
by Linjie Wang
Tue Jun 27, 2017 11:08 am
Forum: OpenSim
Topic: muscle length measure and its parameter setting
Replies: 6
Views: 576

Re: muscle length measure and its parameter setting

Thanks a lot, Chris.