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Analysis Tool Understand
Posted: Mon Feb 25, 2019 5:29 am
by cuiweiling
hi,
how to understand the express_in_frame of analysis tool? Is it the corresponding reference system?
thanks!
Re: Analysis Tool Understand
Posted: Mon Feb 25, 2019 12:39 pm
by mitkof6
Each body has its own reference frame. Quantities are expressed (measured) in some reference frame (e.g., ground). One can reexpress (transform) any measure from one reference frame to another using the appropriate transformation function:
https://simtk.org/api_docs/opensim/api_ ... 320ffb28f6
Please go through the attached tutorial to understand their importance for multibody systems.