Search found 115 matches

by Krishnakumar Sankar
Sun Jan 28, 2018 11:58 pm
Forum: OpenSim
Topic: Changes in Coordinates
Replies: 1
Views: 352

Changes in Coordinates

Hai, I would like to apply Elastic foundation model for a grasp activity using wrist model. In order to mesh the segments of the wrist I imported the segments individually one by one as .stl files in a meshing software. I did this to have the same orientation of the wrist model so that I can have a ...
by Krishnakumar Sankar
Tue Nov 21, 2017 3:21 pm
Forum: OpenSim
Topic: Creating Contact surface on glass
Replies: 8
Views: 2658

Re: Creating Contact surface on glass

arbitrary positioning of the contact spheres The spheres in the glass come exactly in contact with the spheres of the finger segments Image.tiff The parameters you use for the contact model may be another source of uncertainty Previously for working on grip activity of a ball, I had used Hunt cross...
by Krishnakumar Sankar
Tue Nov 21, 2017 5:04 am
Forum: OpenSim
Topic: Creating Contact surface on glass
Replies: 8
Views: 2658

Re: Creating Contact surface on glass

depending on how precisely you need to model the shape of the object
.
Img 1.JPG
Img 1.JPG (27.58 KiB) Viewed 2545 times
This is how I created contact spheres sir. on the glass surface sir. Could you provide feedbacks on this
by Krishnakumar Sankar
Thu Nov 02, 2017 12:55 am
Forum: Contact Modeling with OpenSim: a User’s Approach
Topic: Contact Modeling with OpenSim: a User’s Approach Public Forum
Replies: 5
Views: 2343

Re: Contact Modeling with OpenSim: a User’s Approach Public Forum

Hi I would like to perform a glass grasp activity using inverse dynamics simulation technique.Since both the finger segments and glass, both are rigid,I wanted to use elastic foundation model. 1.I made triangular mesh for all the finger segments in the wrist model since that is the requirement for p...
by Krishnakumar Sankar
Wed Nov 01, 2017 10:36 pm
Forum: OpenSim
Topic: Elastic Foundation model
Replies: 8
Views: 2282

Re: Elastic Foundation model

As I have created contact meshes for the finger segments, I have wrote the below code <ContactGeometrySet> <objects> <ContactMesh name="f2"> <!--Body name to connect the contact geometry to--> <body_name>Iphalanx1</body_name> <!--Location of geometry center in the body frame--> <location>0.001 -0.03...
by Krishnakumar Sankar
Wed Nov 01, 2017 10:19 pm
Forum: OpenSim
Topic: Viewing the contact mesh in GUI
Replies: 1
Views: 456

Viewing the contact mesh in GUI

Hi,
Could you direct me on how to view the contact mesh i created for the finger segments in my GUI window.Under bodies tab,it is not showing up to select.


Thank you
by Krishnakumar Sankar
Wed Nov 01, 2017 11:20 am
Forum: OpenSim
Topic: Elastic Foundation model
Replies: 8
Views: 2282

Re: Elastic Foundation model

You haven't told us anything about how you are doing the analysis. Are you doing this in ID, Static Optimization, CMC? i am performing Inverse dynamics analysis. Glass 4,6.mot Glass and the hand with contact spheres on their surface. Fig1.JPG Graph for MCP joint moments Capture.JPG Considering both...
by Krishnakumar Sankar
Wed Nov 01, 2017 9:43 am
Forum: OpenSim
Topic: Elastic Foundation model
Replies: 8
Views: 2282

Re: Elastic Foundation model

Hi , My objective is to obtain the joint moments of the fingers for the grasp activity of a glass tumbler. To implement elastic foundation,firstly I triangular meshed the finger segments and the glass . Created contact spheres on the glass in such a way that the contact spheres of the finger segment...
by Krishnakumar Sankar
Wed Nov 01, 2017 12:36 am
Forum: OpenSim
Topic: Elastic Foundation model
Replies: 8
Views: 2282

Re: Elastic Foundation model

Thank you so much sir.
by Krishnakumar Sankar
Tue Oct 31, 2017 9:14 pm
Forum: OpenSim
Topic: Elastic Foundation model
Replies: 8
Views: 2282

Re: Elastic Foundation model

Do you want to compute forces between the fingers and the glass? If so, it sounds like you do need contact at the fingers
The finger segments are in .vtp file format.What is the procedure to mesh it.I mean how to convert to a 3D read/write file format.