Hi Leng-Feng,

> Is it possible that you post the Matlab m-file(s) that you used to

> generate the plot? I would like to know how you have formulate the

> muscle force as a function of Lm, Lmtdot, Lmdot,etc. (and the

> activation force). I am able to generate the muscle force response

> given in the literature(s), but having difficulty to generate the

> same result using AnyBody - which gives me some difficulty in

> relating the muscle model in the literature and how AnyBody has

> implemented it.

We are right now in the process of writing a publication about this

muscle model so we will keep the Matlab files to ourselves for the

time being. I hope you understand this.

I can give you the main references, though:

Daxner, T. (1997, August). Simulation von beuge- und

streckbewegungen des menschlichen knies mit dads. Ph.D.

dissertation, Institut fÂ¨ur Mechabik der Technischen Universit

Â¨at Wien, A-4810 Gmunden HochmÂ¨ullergasse 22,

Wien. Matr.Nr.: 8825624.

GfÃ¶hler, M., T. Angeli, T. Eberharter, and P. Lugner

(1999). Dynamic simulation of cycling powered by lower

extremity muscles activiated by functional electrical simulation.

In XIIth Biomechanics Seminar, HÃ¶gfors C, Editor,

pp. 101â€“122. vol. 12 (ISSN 1100-2247). GÂ¨oteborg.

Unfortunately they are both difficult to get and the first one is in

German. You may check Pubmed to see what else you can find from the

same authors.

> Thanks for your reply. That is what I am trying to do:

> regenerate the

> graph in AnyBody to better understand the muscle

> model’s reponse, and

> the model you mentioned is what I have set up-I’ll take your

> suggestions and see how it turns out.

This we can help you with. If you need any help on setting the model

up, then please upload what you have and I will be happy to take a

look at it and help you get the right results out. It seems like it

could be a good model to use in our muscle modeling tutorial.

Best regards,

John