Velocity Measures
Velocity Measures
(OP)
I am creating a biomechanical model of the human neck. I have created measures that calculate position, velocity, and acceleration of different muscles during motions, and am having a hard time with the velocity.
When the velocity function is made, I specified the to_marker and the from_marker and the reference_marker. I created 2 functions, one where the reference_marker was the to_marker and one where it was the from_marker. The final velocities are different, and I am wondering where I went wrong. I expected them to be the same, as the same 2 markers are used in both cases. Any help would be appreciated, thanks!
When the velocity function is made, I specified the to_marker and the from_marker and the reference_marker. I created 2 functions, one where the reference_marker was the to_marker and one where it was the from_marker. The final velocities are different, and I am wondering where I went wrong. I expected them to be the same, as the same 2 markers are used in both cases. Any help would be appreciated, thanks!





RE: Velocity Measures
post your code,
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Velocity Measures
R_SCM_VEL
!!!!!!!!Beginning
if cond=(.gui.funcBldr.displayed)
if cond=(eval(alert("warning", "Function Builder is already displayed. Proceeding will erase existing contents. Proceed?", "Yes", "No", "",1) != 1))
return
end
end
int dia disp dia=.gui.funcBldr par="Function Measure", "", "", "", (UNIQUE_NAME("FUNCTION_MEA"))
measure cre function measure=.model_1.R_SCM_VEL function="VM(MARKER_84, MARKER_85, MARKER_85)" &
units = no_units create_measure_display = yes
! set measure plotting attributes
measure attributes measure=.model_1.R_SCM_VEL &
&
&
int dialog execute dialog=.gui.funcBldr undisp=yes
!!!!!!!End
R_SCM_VEL2
!!!!!!!!Beginning
if cond=(.gui.funcBldr.displayed)
if cond=(eval(alert("warning", "Function Builder is already displayed. Proceeding will erase existing contents. Proceed?", "Yes", "No", "",1) != 1))
return
end
end
int dia disp dia=.gui.funcBldr par="Function Measure", "", "", "", (UNIQUE_NAME("FUNCTION_MEA"))
measure cre function measure=.model_1.R_SCM_VEL2 function="VM(MARKER_84, MARKER_85, MARKER_85)" &
units = no_units create_measure_display = yes
! set measure plotting attributes
measure attributes measure=.model_1.R_SCM_VEL2 &
&
&
int dialog execute dialog=.gui.funcBldr undisp=yes
!!!!!!!End
Thanks again for your help,
Zach
RE: Velocity Measures
the critical line
function="VM(MARKER_84, MARKER_85, MARKER_85)"
is the same in each
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?