Defining Chebyshev Type I Filters

You can use the Chebyshev Type I filter to filter output based on the cutoff frequency and filter order.

Compared to the Butterworth filter, the Type I Chebyshev filter has a sharper transition between the pass band and the stop band; however, it has a ripple in the pass band.

See Also
About Output Filters
  1. From the Simulate section of the action bar, click Chebyshev Type 1 Filter .
  2. Optional: Enter a descriptive Name.
  3. Enter a value for the Cutoff frequency, which is the frequency above which the filter attenuates at least half of the input signal.
  4. Enter a value for the Order, which is a measure of the transition band.

    A higher value for the filter order results in a narrower transition band. However, there is a computational cost. As the order increases, the performance declines.

  5. Specify the Pass-band ripple factor, which specifies how much oscillation you will allow in exchange for an improved filter response.
  6. Optional: From the Determine bounding value options, select one of the following:
    OptionDescription
    Maximum Applies a bounding limit for the maximum.
    Minimum Applies a bounding limit for the minimum.
    Absolute Maximum Applies a bounding limit for the absolute maximum.
    None Does not apply a bounding limit.
  7. Optional: Enter a value for the Bounding value limit, which enforces an upper or lower bound for the variables in the output request.
  8. Optional: Select Stop analysis upon reaching limit to stop the analysis if any of the variables reach the specified limit.

    Note: Along with the expected output variables, Mechanical Scenario Creation writes an additional field frame to the output file when this option is selected.

  9. Optional: From the Invariant options, specify whether this filter definition applies directly to the first- or second-order invariant.

    Invariants are tensor properties that do not change. For some variables, you can apply the filter directly to the first- or second-order invariant.

  10. Click OK.

The specified Chebyshev Type I filter is now available when you select a filter type when creating output requests.