HAS-Motion Software Documentation

User Tools

Site Tools

You are here: Main Page » visual3d » documentation » kinematics_and_kinetics » external_forces » Force Platforms Overview
visual3d:documentation:kinematics_and_kinetics:external_forces:force_platforms

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
visual3d:documentation:kinematics_and_kinetics:external_forces:force_platforms [2024/12/02 15:43] – wikisysopvisual3d:documentation:kinematics_and_kinetics:external_forces:force_platforms [2025/09/12 18:51] (current) – [C3D Channels] wikisysop
Line 15: Line 15:
 The Ground Reaction Force is represented by 3 vectors: Force, Center of Pressure, and Free Moment. These Ground Reaction Force vectors are computed from the ANALOG signals recorded from the force platform, with the calculations performed as specified by the force platform manufacturer, and the location of the force platform in the laboratory. Within the Visual3D data tree the resulting Force signal is stored in the FORCE folder; the Center of Pressure signal is stored in the COFP folder; and the Free Moment signal is stored in the FREEMOMENT folder. The Ground Reaction Force is represented by 3 vectors: Force, Center of Pressure, and Free Moment. These Ground Reaction Force vectors are computed from the ANALOG signals recorded from the force platform, with the calculations performed as specified by the force platform manufacturer, and the location of the force platform in the laboratory. Within the Visual3D data tree the resulting Force signal is stored in the FORCE folder; the Center of Pressure signal is stored in the COFP folder; and the Free Moment signal is stored in the FREEMOMENT folder.
  
-{{:Visual3D_Force_Signal_Calculations.png}}+{{:Visual3D_Force_Signal_Calculations.png?500x}}
  
 ==== Filtering Force Signals ==== ==== Filtering Force Signals ====
Line 23: Line 23:
 1. Filter the ANALOG signals and select the option to use PROCESSED ANALOGS. In this case you will not need to filter the resulting FORCE, COFP, and FREEMOMENT signals. 1. Filter the ANALOG signals and select the option to use PROCESSED ANALOGS. In this case you will not need to filter the resulting FORCE, COFP, and FREEMOMENT signals.
  
-{{:Visual3D_Filtering_Analog_Force_Signals.png}}+{{:Visual3D_Filtering_Analog_Force_Signals.png?800x}}
  
 In order to use PROCESSED ANALOGS, verify in the settings menu that the option **Use Processed Anglogs for Ground Reaction Force Calculations** is checked. If this is the case, then Visual3D will calculate the FORCE, COFP, and FREEMOMENT signals using the signals found in ANALOG::PROCESSED. If the PROCESSED folder does not exist, then Visual3D will default to using the ORIGINAL folder instead. In order to use PROCESSED ANALOGS, verify in the settings menu that the option **Use Processed Anglogs for Ground Reaction Force Calculations** is checked. If this is the case, then Visual3D will calculate the FORCE, COFP, and FREEMOMENT signals using the signals found in ANALOG::PROCESSED. If the PROCESSED folder does not exist, then Visual3D will default to using the ORIGINAL folder instead.
Line 29: Line 29:
 2. Filter the FORCE signals directly. In this case you should also filter the COFP and FREEMOMENT signals. 2. Filter the FORCE signals directly. In this case you should also filter the COFP and FREEMOMENT signals.
  
-{{:Visual3D_Filtering_Force_Signals.png}}+{{:Visual3D_Filtering_Force_Signals.png?800x}}
  
 In order to use these PROCESSED signals, verify in the settings menu that the option **Use Processed Targets for Model/Segment/LinkModelBased items** is checked. If this is the case, then Visual3D will calculate any [[Visual3D:Documentation:Visual3D_Signal_Types:KINETIC_KINEMATIC_Data_Type|kinetic and kinematic]] signals using the signals in the PROCESSED folder of the TARGETS, FORCE, COFP, and FREEMOMENT signal types. Again, if the PROCESSED folder does not exist, then Visual3D will default to using the respective ORIGINAL folders instead. In order to use these PROCESSED signals, verify in the settings menu that the option **Use Processed Targets for Model/Segment/LinkModelBased items** is checked. If this is the case, then Visual3D will calculate any [[Visual3D:Documentation:Visual3D_Signal_Types:KINETIC_KINEMATIC_Data_Type|kinetic and kinematic]] signals using the signals in the PROCESSED folder of the TARGETS, FORCE, COFP, and FREEMOMENT signal types. Again, if the PROCESSED folder does not exist, then Visual3D will default to using the respective ORIGINAL folders instead.
Line 75: Line 75:
 The number of channels associated with a force platform and the information carried by each channel varies with the force platform manufacturer (usually represented as a force platform [[Visual3D:Documentation:Pipeline:Force_Commands:FP_TYPE|TYPE]] in the C3D format). The specifics of each force platform type can be found on the associated page: The number of channels associated with a force platform and the information carried by each channel varies with the force platform manufacturer (usually represented as a force platform [[Visual3D:Documentation:Pipeline:Force_Commands:FP_TYPE|TYPE]] in the C3D format). The specifics of each force platform type can be found on the associated page:
  
-| [[visual3d:documentation:pipeline:force_commands:fp_type_1|FP_TYPE 1]] | [[visual3d:documentation:pipeline:force_commands:fp_type_2|FP_TYPE 2]] | [[visual3d:documentation:pipeline:force_commands:fp_type_3|FP_TYPE 3]] | [[visual3d:documentation:pipeline:force_commands:fp_type_4|FP_TYPE 4]] | [[visual3d:documentation:pipeline:force_commands:fp_type_5|FP_TYPE 5]] | [[visual3d:documentation:pipeline:force_commands:fp_type_6|FP_TYPE 6]] | [[visual3d:documentation:pipeline:force_commands:fp_type_7|FP_TYPE 7]] |+  * [[visual3d:documentation:pipeline:force_commands:fp_type_1|FP_TYPE 1]] 
 +  * [[visual3d:documentation:pipeline:force_commands:fp_type_2|FP_TYPE 2]] 
 +  * [[visual3d:documentation:pipeline:force_commands:fp_type_3|FP_TYPE 3]] 
 +  * [[visual3d:documentation:pipeline:force_commands:fp_type_4|FP_TYPE 4]] 
 +  * [[visual3d:documentation:pipeline:force_commands:fp_type_5|FP_TYPE 5]] 
 +  * [[visual3d:documentation:pipeline:force_commands:fp_type_6|FP_TYPE 6]] 
 +  * [[visual3d:documentation:pipeline:force_commands:fp_type_7|FP_TYPE 7]]
  
 ==== Computing Force, COP, and Free Moment ==== ==== Computing Force, COP, and Free Moment ====
visual3d/documentation/kinematics_and_kinetics/external_forces/force_platforms.1733154187.txt.gz · Last modified: 2024/12/02 15:43 by wikisysop