Table of Contents
KINETIC_KINEMATIC Data Type
The KINETIC_KINEMATIC folder contain intermediate data related to a Visual3D segment. This data describes the kinetic and kinematic information for the segment in question, represented in the laboratory coordinate system. In most cases there is no anatomical meaning to the laboratory, so these intermediate signals are rarely reported. In most cases kinetics and kinematics are reported as model-based items.
Computing Kinetic_Kinematic Data
KINETIC_KINEMATIC signals are computed when:
- a model template is applied to the model
- the segment is created
- a movement trial is assigned to a model
- when the model is built
- when the RECALC pipeline is executed
Using PROCESSED Signals
Under the settings menu there are three options:
- Use Processed Analogs for Ground Reaction Force Calculations
- Use Processed Forces for Segment to Force Assignments
- Use Processed Targets for Model/Segment/LinkModelBased items
In most situations, you want “Use Processed Analogs” and “Use Processed Targets” set to TRUE and Use “Processed Forces” set to FALSE. If “Use Processed Analogs” and “Use Processed Targets” are checked (set to TRUE), then Visual3D will compute Kinetic_Kinematic signals using the data in the PROCESSED folder of the TARGET and ANALOG data types. If the PROCESSED folder does not exist for either of these data types then the respective ORIGINAL folder is used in its place.
The ORIGINAL Folder
The KINETIC_KINEMATIC data type's ORIGINAL folder contains a folder for each segment created in the model. These folders contain the KINETIC_KINEMATIC signals for that segment resolved in the Laboratory Coordinate System. These signals exist for reference; they cannot be processed or included in a Report Graph. Compute model-based data in order to create the desired LINK_MODEL_BASED signals.
The following signals are computed automatically for each segment:
AngAcc | Angular Acceleration of the segment |
AngVel | Angular Velocity of the segment |
CGPos | Position of the segment's Center of Mass |
CGVel | Velocity of the segment's Center of Mass |
CGAcc | Acceleration of the segment's Center of Mass |
DistEndPos | The position of the segment's distal end |
DistEndVel | The velocityof the segment's distal end |
ProxEndPos | The position of the segment's proximal end |
ProxEndVel | The velocity of the segment's proximal end |
ProxEndForce | The Joint Reaction Force at the segment's proximal end |
ProxEndTorque | The Joint Moment at the segment's proximal end |
SegResidual | The result of the least squares fit of the tracking markers at each frame of data. |
Signals relating to Force Assignments
If a segment is assigned to a force, then 3 additional KINETIC_KINEMATIC signals are also created.
Force_n | Assigned Forces |
COP_n | Assigned Center of Pressure |
Free_Moment_n | Assigned Free Moment |