Creating a Law Excitation

A law excitation drives a command in your mechanism by associating a value for the command with each time step in the kinematics simulation either with respect to a design table or a formula. Based on the value of the excitation, the simulation determines the configuration of the mechanism for each time increment specified in the kinematics scenario parameters.

Before you begin: A kinematics simulation referencing a mechanism must be open in the Kinematics Simulation workbench.
Related Topics
Writing Formulas for Law Excitations
Using Design Tables for Law Excitations
Interpolation of Time Increments
Creating a Kinematics Scenario

  1. Click Law Excitation .

    The Law Excitation dialog box appears:

  2. In the specification tree, select the command under the mechanism representation that is the support for the kinematics excitation.

    Tip: Alternatively, select the support first, and then click Law Excitation.

    Depending on the command type you selected, Length formula or Angle formula appears in the Law Excitation dialog box.

  3. Specify the method used to define the excitation:

    • To use a formula to define the excitation, right-click on the Length formula or Angle formula box, and select Edit formula.... For more information, see Writing Formulas for Law Excitations.
    • If a design table has been defined for the excitation, it appears in the Length formula or Angle formula box. To edit the design table, click . For more information, see Using Design Tables for Law Excitations.

  4. Once the appropriate excitation is defined, click OK to save the kinematics excitation and to exit the Law Excitation dialog box.