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by Michael Sherman
Wed Dec 03, 2008 1:46 pm
Forum: SimTK Core Toolset
Topic: Do we need all those "Static" test cases?
Replies: 11
Views: 1188

Do we need all those "Static" test cases?

<t>I'm not sure who's monitoring this forum since it doesn't appear to have been used yet. But in case this is the right place for SimTK Core developer discussions ...<br/> <br/> We now have *lots* of test cases and every one comes in two flavors: shared and static. What do you think about eliminati...
by Michael Sherman
Thu Nov 20, 2008 9:00 pm
Forum: SimTK Core Toolset
Topic: Inverse Dynamics
Replies: 17
Views: 1689

RE: Inverse Dynamics

Thanks for the information about your intended use of inverse dynamics. Would you please clarify for me where you get your acceleration data?

Regards,
Sherm
by Michael Sherman
Thu Nov 20, 2008 8:57 pm
Forum: SimTK Core Toolset
Topic: Inverse Dynamics
Replies: 17
Views: 1689

RE: Inverse Dynamics

<t>Yes, that's right.<br/> <br/> Jean-Olivier, I'm sure you know this already but just in case I want to remind you that inverse dynamics requires specifying desired *accelerations* -- positions and velocities aren't enough. Positions q allow you to calculate the mass matrix M(q), velocities allow f...
by Michael Sherman
Thu Nov 20, 2008 12:21 pm
Forum: SimTK Core Toolset
Topic: Inverse Dynamics
Replies: 17
Views: 1689

RE: Inverse Dynamics

<t>Hi, Jean-Olivier.<br/> <br/> Sorry for the delayed response. I am just returning to Stanford next week after an extended absence. Adding direct support in Simbody for inverse dynamics will be one of my top priorities on return, so calcMa() will be there in the next release.<br/> <br/> There are a...
by Michael Sherman
Mon Oct 06, 2008 9:26 am
Forum: Simbody: SimTK multibody dynamics API
Topic: Other uses to SimBody
Replies: 1
Views: 444

RE: Other uses to Simbody

<t>Hi, Jordi. <br/> <br/> Simbody is based on technology originally developed for robotics (recursive multibody formulation similar to Featherstone's) so should be very well suited to robotics simulation. Robotics simulation tends to be simpler than the biomechanics applications for which Simbody is...
by Michael Sherman
Tue Jul 15, 2008 11:25 am
Forum: Simbody: SimTK multibody dynamics API
Topic: Symbolic Equations
Replies: 1
Views: 384

RE: Symbolic Equations

<t>Hi, Adam. Like SD/FAST, Simbody is a fully general multibody code. Unlike SD/FAST, it achieves that numerically rather than symbolically so there is no generated source code to look at, and therefore no compile step either. However, also unlike SD/FAST Simbody is open source so you can see all th...
by Michael Sherman
Thu Jul 21, 2005 2:21 pm
Forum: SimTK Planning Project
Topic: testing
Replies: 0
Views: 363

testing

This is just a test.
by Michael Sherman
Thu Jul 21, 2005 2:10 pm
Forum: SimTK Planning Project
Topic: Welcome to Developers
Replies: 1
Views: 379

RE: Welcome to Developers

this is a test
by Michael Sherman
Sat Apr 02, 2005 12:02 am
Forum: SimTK Framework Modeling Layer PROTOTYPE
Topic: This project is <E>hot</E>!
Replies: 1
Views: 543

RE: This project is <em>hot</em>!

<em>Please!</em> get the tags right.
by Michael Sherman
Fri Apr 01, 2005 11:59 pm
Forum: SimTK Framework Modeling Layer PROTOTYPE
Topic: This project is <E>hot</E>!
Replies: 1
Views: 543

This project is <E>hot</E>!

You <e>know</e> what I'm talkin' about: the stk fwk mod lyr proto!