Specifications

shown in the figure to the right.

Directly under the ArmModelStudy branch you find the Output branch where all computed results are stored.

Notice that the Output branch contains the folders we defined in the AnyScript model: GlobalRef, Segs, and

so on. In the Segs folder you find ForeArm, and in that a branch for each of the nodes we defined on the

arm. Try expanding the branch for the HandNode. It contains the field 'r' which is the position vector of the

node. We might want to know the precise position of the HandNode at each time in the analysis, for instance

if we were doing an ergonomic study and wanted to know if the hand had collided with anything on its way.

If you double-click the 'r' node, the position vector of the hand node for each time step is dumped in the

message window at the bottom of the screen. So you get the information you wanted, but perhaps not in a

very attractive way. But we can do much better than that. AnyBody has special windows for investigating

results. You open them from the pull-down menus by choosing Window -> ChartFX 2D (new).

This gives you a new window structured just like the editor window with a tree view to the left, but with an

empty graphics field instead of the large text editor field to the right. The graphics field is for graphing

results.

The tree in this window is much like the tree in the editor window except that some of the data have been

filtered out, so that you mainly see the parts of the tree that are relevant in terms of results or output. You

can expand of the tree in the chart window through ArmStudy and Output until you come to the HandNode.

When you pick the property 'r', you get three curves corresponding to the development of the three

Cartesian coordinates of this node during the analysis. Try holding the mouse pointer over one of the curves

for a moment. A small label with the global name of the data of the curve appears. All data computed in

AnyBody can be visualized this way.

So far, we have only the kinematic data to look at. Before we can start the real biomechanics, we must add

some muscles to the model.

This is the subject of Lesson 5: Definition of muscles and external forces

Lesson 5: Definition of muscles and external forces