Getting Started | ![]() ![]() |
An alternative method for designing compensators is to use the Nichols plot, which combines gain and phase information in a single plot. The combination of the two is useful when you are designing to gain and phase margin specifications.
You can design compensators with the SISO Design Tool by using Nichols plot techniques. This section repeats the DC motor compensator design presented in Example: DC Motor, only this time the focus is on Nichols plot techniques. The design strategy, however, is the same:
DC Motor Example
From "SISO Example: the DC Motor" on page 2-4, the transfer function of the DC motor is
This example uses the design criteria specified in Design Specifications:
Opening a Nichols Plot
To open the SISO Design Tool with a Bode diagram and a Nichols plot, use these commands.
Figure 4-42: SISO Design Tool with a Bode Diagram and a Nichols Plot
![]() | Storing and Retrieving Intermediate Designs | Adjusting the Compensator Gain | ![]() |