Muscle recruitment analysis failed!! Please Help me~

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1

Dear members.

I’m taewoo from korea.
I built squat model and I was able to run Kinemetic analysis without
any error.
But, I failed to run Inverse dynamics analysis with following message.

‘Study’ : Muscle recruitment analysis failed, simplex solver reports
that solution does not satisfy all constraints.

I uploaded my squat model as zip file. Please help me what i did wrong.

thank you

2

Hi Taewoo

It is a nice model, I have taken a look at it and found one issue…

The bar has no reactions applied in the environment file on the bar segment,
so in the JointAndDrivers.any file I have added these lines… this will carry
the rotations of the bar which was not carried before…

AnyReacForce barJNTMomentReac = {

 AnyKinRotational RotJNT ={

       AnyRefNode &ref1=Main.Model.EnvironmentModel.bar.neck;

       AnyRefNode

&ref2=Main.Model.HumanModel.Trunk.SegmentsThorax.ThoraxSeg;

       Type=RotAxesAngles;

 };

};

I did not have the contact point on the thorax segment which was used so i
just used the thorax node instead…

Best regards

Søren

From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of woote77
Sent: 13 May 2008 15:36
To: anyscript@yahoogroups.com
Subject: [AnyScript] Muscle recruitment analysis failed!! Please Help me~

Dear members.

I’m taewoo from korea.
I built squat model and I was able to run Kinemetic analysis without
any error.
But, I failed to run Inverse dynamics analysis with following message.

‘Study’ : Muscle recruitment analysis failed, simplex solver reports
that solution does not satisfy all constraints.

I uploaded my squat model as zip file. Please help me what i did wrong.

thank you

[Non-text portions of this message have been removed]

3

Dear Taewoo

I have tested the application again on rep 6.2 and you are right at some
point towards the end it failed…

I have found a few more issues…

1 the gravity is applied in the y direction not the z direction …

2 The sliderjnt in the environment file did not have any reactions applied
on it, your figure suggest that it is a slider joint so I guess it should
look like this.

 AnyKinLinear transJNT = {

   AnyRefNode &frame =

Main.Model.EnvironmentModel.frame.Mainframe.slideJNT;

   AnyRefNode &bar = Main.Model.EnvironmentModel.bar.slideJNT;

 };

   AnyKinRotational RotJNT ={

   AnyRefNode &frame =

Main.Model.EnvironmentModel.frame.Mainframe.slideJNT;

   AnyRefNode &bar = Main.Model.EnvironmentModel.bar.slideJNT;

   Type=RotAxesAngles;

 };

 MeasureOrganizer = {0,1,3,4,5};

 DriverPos={0,0,0,0,0};

 DriverVel={0,0,0,0,0};

 Reaction.Type = {On,On,On,On,On};

};

These changes make the activations look much more reasonable :wink: … I did
not let it run to the end …

The reactions added in the last change may not be needed anymore… it is a
question on what is the realistic boundary condition between the bar and the
thorax?. My guess would be that the moment around the long axis of the bar
should not be there but the other moments should still be there…

Best regards

Søren, AnyBody Support

From: anyscript@yahoogroups.com [mailto:anyscript@yahoogroups.com] On Behalf
Of woote77
Sent: 15 May 2008 04:50
To: anyscript@yahoogroups.com
Subject: [AnyScript] Re: Muscle recruitment analysis failed!! Please Help
me~

Dear Soren

I really appreciate your help. but I still have provlem.
I added reacforce as you mentioned. but Inverse dynamics still isn’t
working

Anybody showed same error message…like this…

ERROR(OBJ1) : D:\ARep\Aalborg\080507_SM_IBG_75kg_kinematic-
ok\squat.Main.any(62) : ‘Study’ : Muscle recruitment analysis
failed, simplex solver reports that solution does not satisfy all
constraints.

Did you check that inverse dynamics is working after added reac
force in bar?

Please check it~~

Best Regards
Taewoo

— In anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com,
“AnyBody Support” <support@…>
wrote:
>
> Hi Taewoo
>
>
>
> It is a nice model, I have taken a look at it and found one issue…
>
>
>
> The bar has no reactions applied in the environment file on the
bar segment,
> so in the JointAndDrivers.any file I have added these lines?this
will carry
> the rotations of the bar which was not carried before…
>
>
>
> AnyReacForce barJNTMomentReac = {
>
> AnyKinRotational RotJNT ={
>
> AnyRefNode &ref1=Main.Model.EnvironmentModel.bar.neck;
>
> AnyRefNode
> &ref2=Main.Model.HumanModel.Trunk.SegmentsThorax.ThoraxSeg;
>
> Type=RotAxesAngles;
>
> };
>
> };
>
>
>
> I did not have the contact point on the thorax segment which was
used so i
> just used the thorax node instead…
>
>
>
> Best regards
>
> S?en
>
>
>
> _____
>
> From: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
[mailto:anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com]
On Behalf
> Of woote77
> Sent: 13 May 2008 15:36
> To: anyscript@yahoogrou <mailto:anyscript%40yahoogroups.com> ps.com
> Subject: [AnyScript] Muscle recruitment analysis failed!! Please
Help me~
>
>
>
> Dear members.
>
> I’m taewoo from korea.
> I built squat model and I was able to run Kinemetic analysis
without
> any error.
> But, I failed to run Inverse dynamics analysis with following
message.
>
> ‘Study’ : Muscle recruitment analysis failed, simplex solver
reports
> that solution does not satisfy all constraints.
>
> I uploaded my squat model as zip file. Please help me what i did
wrong.
>
> thank you
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

[Non-text portions of this message have been removed]