@myGL 

Thanks, this helps!

@myGL 

Thanks, this helps!

Thank you very much, Dr. Lai!

This is excellent idea with addition of parallel links!
Unfortunately, I don't understand, why are you using RBF4? An alpha angle I set with initial value of an angle in R1.
Here is my results (all just as at you, except for RBF4):

Once again, thank you for your ideas, patience in correction of my errors and misprints (and my bad english:).

Thank you very much, Dr. Lai!

This is excellent idea with addition of parallel links!
Unfortunately, I don't understand, why are you using RBF4? An alpha angle I set with initial value of an angle in R1.
Here is my results (all just as at you, except for RBF4):

Once again, thank you for your ideas, patience in correction of my errors and misprints (and my bad english:).

@Tim Vrablik 

Yes, it has worked! It is so simple! More straight way...

How this idea has come to you mind? It seems to me, this option isn't described anywhere... Thanks a lot!

@Tim Vrablik 

Yes, it has worked! It is so simple! More straight way...

How this idea has come to you mind? It seems to me, this option isn't described anywhere... Thanks a lot!

Sorry Tim, but I need some pictures, because I can't open try3.msim. What is your MapleSim version? I have only MapleSim2 and forced to translate your ideas in a format of this version.

Sorry Tim, but I need some pictures, because I can't open try3.msim. What is your MapleSim version? I have only MapleSim2 and forced to translate your ideas in a format of this version.

Exactly! Thank you very much for your idea, Oliver!

Exactly! Thank you very much for your idea, Oliver!

Thanks! But it couldn`t solve my problem. I try to model the simple pendulum in which massless rod changes length under the set law (see above), not under the influence of elastic forces (as spring).

Thanks! But it couldn`t solve my problem. I try to model the simple pendulum in which massless rod changes length under the set law (see above), not under the influence of elastic forces (as spring).

Thank you!

Thank you!