sorry jerome,
I should have given you the script descriptions.
you can put a recruitment penalty on the MinMaxOOSolQP by saying;
AnyFolder &Model = .OptModel;
RecruitmentSolver = MinMaxOOSolQP;
nStep=158;
Gravity = {0.001, 0.001,-9.81};
RecruitmentLpPenalty=0;
RecruitmentQpPenalty=1000;
tStart=2.6917+0.1;
tEnd= 4.7872892405;
I have had mixed results when comparing my EMG to muscle activity in AnyBody,
especially at the ankle where it is hard to constrain. Are you taking into
account AnyBody maybe a fraction earlier in muscle recruitment (it doesn’t have
a CNS system).
I hope this helps
peter
Jerome <jromeo_sc_forever@yahoo.com> wrote: Thanks for the suggestion Peter. I
tried the MinMaxOOSolSimplex and
MinMaxSimplex solvers and neither of them ran in the
InverseDynamicAnalysis. Both gave the same error:
‘Study’ : Muscle recruitment analysis failed, simplex solver
reports that solution does not satisfy all constraints.
I also tried the MinMaxOOSolQP solver but (though it ran) this
yielded even more unfavourable results. Anyone with any other
suggestions ?
— In anyscript@yahoogroups.com, Peter Worsley
wrote:
>
> Hi Jerome,
>
> thats an interesting project you are running. I am looking at some
proprioceptive tests too, but with the knee. In terms of your muscle
activity, have you tried using the other recruitement solvers in
AnyBody?
>
> I have found that MinMaxOOSolSimplex and OOSolQP can produce some
better results when comparing to EMG.
>
> I hope this helps
>
> best wishes
>
> Peter
>
> Jerome wrote: Hi,
>
> I’ve been working on a model that compares EMG data collected to
> muscle activity data calculated by my AnyBody model. I plot the two
> over one another (for the muscle of interest) in the ‘AnyChart
2D/3D’
> window only after running the calibration sequence. There a two
> things I notice that I’m hoping someone could help me rectify after
> looking at my model:
>
> 1)While the timing of activation of 3 out of the 4 muscles I’m
> looking at match rather well, the muscle activity graph of the 4th
> (the right tibialis anterior muscle) does not look anything at all
> like the EMG data for that muscle. I would like some help figuring
> out why this is so, and if there is something I’m doing ewrong that
> can be easily rectified.
>
> 2)How can I get the muscle activation graphs to better represent
the
> pattern of the EMG data. Though I was not expecting the calculated
> activity to match the EMG exactly in pattern, I was hoping to see
the
> areas with relatively higher EMG activity represented likewise in
the
> model’s calculated activity (and a similar corelation in the points
> of lower activity). Is it even possible to get results like this
with
> AnyBody, and if so how can this be done ?
>
> Please take a look at my model. Your insite would be greatly
> appreciated. Its posted with the name ‘EMG-Activity.rar’
>
> Jerome
>
>
> ------------------------------------
>
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>
>
>
>
>
>
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Sent from Yahoo! Mail.
A Smarter Email.
[Non-text portions of this message have been removed]