panel set twindow_function vm
The VM function calculates the magnitude of the translational velocity vector of the I_MARKER (i1) with respect to the J_MARKER (i2).
Format:
panel set twindow_function vm |
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i_marker_name = | an existing marker |
j_marker_name = | an existing marker |
reference_frame_marker = | an existing marker |
Example:
panel set twindow_function vm & |
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i_marker_name | marker_1 & |
j_marker_name | marker_2 |
Description:
Parameter | Value Type | Description |
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I_marker_name | An Existing Marker | Specifies an existing marker used as the I_MARKER (i1) in the evaluation of the function. |
J_marker_name | An Existing Marker | Specifies an existing marker used as the J_MARKER (i2) in the evaluation of the function. |
Reference_frame_marker | An Existing Marker | |
Extended Definition:
1. Mathematically, VM is calculated as follows:
VM = ( [ Vi1 - Vi2] dot_product_of [ Vi1 - Vi2] )**1/2
where Vi1 is the velocity of the I_MARKER (i1) in ground, and Vi2 is the velocity of the J_MARKER (i2) in ground.
2. You may identify a marker by typing its name or by picking it from the screen.
If the marker is not visible on the screen, you must type the name. You may also find it convenient to type the name even if the marker is displayed.
If you created the marker by reading an Adams data set or graphics file, the marker name is the letters MAR followed by the Adams data set marker ID number. The name of Adams MARKER/101 is MAR101, for example. If you created the marker during preprocessing, you gave it a name at that time.
If a marker is available by default, you may identify it by entering its name only. If it is not, you must enter its full name. To identify a marker under a different part, for instance, you may need to enter the model and part names as well. For example, you may specify marker 'pivot' from model 'links', part 'lower_arm' by entering ".links.lower_arm.pivot".
You must separate multiple marker names by commas.
If the marker is visible in one of your views, you may identify it by picking on it.
You need not separate multiple marker picks by commas.
Tips:
1. If you type a "?", Adams View will list the markers available by default.