Design Constraints for Open-Loop and Prefilter Bode Diagrams :: SISO Design Tool (Using the SISO Design Tool and the LTI Viewer)

Using the SISO Design Tool and the LTI Viewer

Design Constraints for Open-Loop and Prefilter Bode Diagrams

For both the open-loop and prefilter Bode diagrams, you have the following options:

Upper Gain Limit
Lower Gain Limit

Specifying any of these constraint types causes lines to appear in the Bode magnitude curve. To specify an upper or lower gain limit, enter the frequency range, the magnitude limit, and/or the slope in decibels per decade, in the appropriate fields of the Constraint Parameters panel. You can have as many gain limit constraints as you like in your Bode magnitude plots.

Upper Gain Limit

You can specify an upper gain limit, which appears as a straight line on the Bode magnitude curve. You must select frequency limits, the upper gain limit in decibels, and the slope in dB/decade.

Lower Gain Limit

Specify the lower gain limit in the same fashion as the upper gain limit.

Example: Adding Damping Ratio Constraints Example: Adding Upper Gain Limits