Specifications

84
Picking the step button.
The first step re-establishes the load-time conditions. This means that it positions the modes as it was when
you loaded it. This is useful for identification of kinematic problems. The second step positions the segments
honoring the joints. The third does not seem to do much, but it is used for positioning muscles wrapping
over surfaces. It is just not visible in this simple model.
The SetInitialConditions study can be thought of as the first step of a kinematic analysis, which will be the
subject of the next lesson.
Lesson 3: Kinematic Analysis
The KinematicAnalysis operation has a short and a very long explanation. The short explanation is that it
makes the model perform whichever movement you have imposed on it by the drivers you have defined in
the model. And it only does the movement. There is no calculation of forces involved, and the system does
not even have to be properly balanced to be subjected to KinematicAnalysis. However, it does have to be
kinematically determinate, but that concept is definitely a part of the longer explanation.
So, brace yourself, and let's venture on to...
The long explanation