State Dependent Variables

You can assign inputs to motors and actuators that are dependent on the state of motors, actuators, systems, and measures. Example input types include Torque vs. Speed, Force vs. Angle, and Force vs. Distance.

  1. Select a motor or actuator.
  2. Make the motor or actuator dependent on a variable object:
    1. In the microdialog, click Time, and then select the Independent Variable option.
    2. Click Select an Independent Variable.
    3. In the modeling window, select a measure, system, actuator, or motor to make it the independent variable.
  3. In the Profile Editor, specify the variable range or cycle over which input function will be applied.
    1. In the microdialog click Profile Editor.
    2. Specify the variable range or cycle over which the input function will be applied:
    Option Description
    Function Select a profile function. Supported function include:
    • Step
    • Step-Dwell-Step
    • Single Wave
    • Impulse
    • Table
    Variable The independent variable object (system, measure, motor, or actuator).
    Reference Frame The reference frame used by the variable component.
    Variable Component The independent variable component output that the state dependent object (system, measure, motor, or actuator) will monitor. Use the dropdown menu to access to the library of functions.
    One Cycle For Cyclic rotations, the V(i) and V(f) values can be specified to fall within this cycle range. For example, a 4-stroke piston engine will experience combustion force every 2 revolutions (or 7200) of the crankshaft.
    Variable (i) Enter the initial value of the independent variable object.
    Variable (f) Enter the final value of the independent variable object.
    [Variable Object] Force (i) Enter the initial value of the state dependent object (system, measure, motor, or actuator).
    [Variable Object] Force (f) Enter the final value of the state dependent object (system, measure, motor, or actuator).