<t>I experimented a long time with the weight settings in the task file. By adjusting the settings I'm getting nearer to the original movement. What I don't understand: Why does the algorithm alter the movement? Why doesn't it "just" take the movement to compute the muscle excitations?<br/> I would ...

<t>I see. I have the following problem: I want to reduce the model to simulate a squat jump. For this, I just want to use four muscles each leg without all the other muscles. I deleted the muscles from the model file. If I run RRA, everything is fine. But running CMC, the model performs absolutely s...

Hey Giordano,
thats clear. But I don't know how to reduce the number of dofs in the model-file. Which tags do I have to modify?
Greets,
Daniel

<t>Hi Veerle,<br/> actually I had some problems installing OpenSim, too. <br/> First: I get an java-error often while new models are loaded. But these errors didn't influence OpenSim and can be ignored.<br/> Second: When I first installed OpenSim, it created its folder in the user-specifies program-...

Hi Tim,
I think you find these informations in the OpenSim User Guide (Chapter 18.5.1.6). The tag specifies the appropriate accompanying model kinematics for the external loads.

Daniel

<t>Hello all,<br/> I have a little question, I think it is not difficult to answer for you:<br/> I recently worked with the model gait2392. But now I want to reduce the amount of muscles used in this model and I just want to have four muscles for each leg (knee extension/bending). It was not difficu...

<t>The solution:<br/> I finally managed to run RRA without the problems I described. The solution is to switch the kv and kp parameters higher. In my "standard" file it was 100 and 20. Now, with 1600 and 80, it works fine. I will see, whether I can complete CMC with these setting, too.<br/> <br/> Da...

Hello all,
I tried RRA with 200k and 500k integration steps. I also increased output precision and decreased the optimizer derivative and convergence criterion value. This didn't solve my problem.
Daniel

I tried to do that. I ran RRA over a 1.2-second interval with 160k integration steps. Nevertheless the model starts to hover. I will increase the steps a little more but I don't think that this will solve the problem.
- Daniel

I figured out some more about my problem. Perhaps anyone of you can help me afterwards: When I run RRA in small intervals (0.25 seconds), I can solve it without taking off. But when I try to solve the whole interval (about 2 seconds), the mistake occurs. What could cause this?