The four vertical force actuators are able to generate the 50N each. For other motions it might be that the 'force-length' and 'force-velocity' relations make the maximum force an actuator can generate zero, but looking at the motion i use now they are within their force producing ranges. I guess fo...

Hi Jas, I think the different joint sign conventions in the model are the reason for the curves to be "upside down" for you. We have seen similar things when directly comparing Vicon results with results from OpenSim plots. You can easily check this by looking at the kinematics. Hope this helps, Erik

1. Sorry that is my bad. The actuators without a direction specification are for the vertical Y direction. If there where no actuators acting for the vertical direction the forward simulation would have shown the block falling through the 'floor', which is undesirable. 2. I am not sure I understand ...

Hi, I made a simple environment of a block moving on the floor with the new actuators on the four base corners. At first I tested a forward simulation and this looks good. Next I ran some static optimizations of motions resulting from the forward dynamic simulation and some self made motions. This a...

Hi Ayman, Thanks for your reply. About the removal of all actuators except muscles, residuals and GRF; How come PointActuators do appear in the results of a StaticOptimization? Are they then somehow considered as residuals? The New Actuator was only added in the model file. I did not specify anythin...

Hi support, I am trying to implement a new type of PointActuator (I call it: PointGRFActuator) that has an extra position and velocity factor that adjusts the amount of force it can produce. The position factor is from an exponential function using the vertical distance between the PointGRFActuator'...

Dear all, Is there a way to access the information(through API) on the location of a PointActuator? When creating the PointActuator you can set the location, 'point', which I would like to use in an event trigger to change the optimal force of the actuator if it crosses a certain plane. Best regards...

Hi, I was wondering what kind of algorithm is used in the Inverse Dynamics tool. When looking at the code it seems like a least squares static optimization method. Is it the same as described by Kuo, A least-squares estimation approach to improving the precision of inverse dynamics computations in J...

Hi all, I am trying to spline fit kinematic data to get it with a sample frequency equal to the ground reaction forces (1000Hz) but I am not succeeding very well with this. I think I successfully managed to create the simmsplines with the following SimmSpline rSpline, lSpline; for(int i=1; i<MTime.g...

Hi Yoann,

You could have a look at the source code of OpenSim and perhaps also SimBody. In the source code you can find the cpp files that are used for the StaticOptimization in OpenSim, and more general the Optimizer in SimBody.

Best regards,
Erik