The topics covered in this section include:

How to Use the GUI

The inverse dynamics tool is accessed by selecting Tools → Inverse Dynamics… from the OpenSim main menu bar. Like all tools, the operations performed by the inverse dynamics tool apply to the current model. The name of the current model is shown in bold in the Navigator. See Opening, Closing, and Using the Navigator Window for information on opening models and making a particular model current.

  • The Inverse Dynamics Tool is controlled by a window with two tabbed panes.

  • The Main Settings pane is used to specify parameters relating to the input kinematics of the current model, the time range for the analysis, and the output of the results.

  • The External Loads pane is used to specify parameters relating to the external loads applied to the model during the analysis.

Use the Load... and Save... buttons to store and reload your tool settings. For more information see the section on The Control Panel in the section on How to Use the Scale Tool.



Main Settings Pane

The Main Settings pane is used to specify parameters relating to the input kinematics of the current model, the time range for the analysis, and the output of the results. The pane is organized into four main sections entitled Current Model, Input, Time, and Output.

  • The section for Input displays editable information that allows you to specify the kinematics (e.g., states or motion) describing the movement of a model. 
  • You may use the radio button to select either From file or Loaded motion as the input type. 
  • You may use the folder button to browse for the associated input file. 
  • If you select the  radio button next to Loaded motion, you will need to choose a motion from the  drop down list. 
  • The section for Time displays editable information that allows you to specify the start and end time for the inverse dynamics analysis
  • The section for Output displays editable information that allows you to specify the directory to which the file is saved.
  • You may use the folder button to browse for and specify a directory in which to save the output files.
  • You may use the search button to open an Explorer window to the specified directory.

Command-line Execution

The Inverse Dynamics Tool is run using the command analyze -S <setup file name>, for example,

id -S subject01_Setup_InverseDynamics.xml


Next: ID Settings Files and XML Tags

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