National Instruments Xmath Interactive Control Design Module ICDM - Manual (Page 114)

Chapter 13 Multi-Loop Synthesis
© National Instruments Corporation 13-3 Xmath Interactive Control Design Module
Figure 13-2. Multi-Loop Gain and Phase Plots Added to the ICDM Main Window
Setup and Synthesis Method
This section describes the setup and synthesis method for multi-loop
synthesis.
Multi-Loop Versus Multivariable Design
In most multivariable control design methods such as synthesis, no specific
assumptions are made about which loops should be closed and which ones
not. In general, all components of the resulting controller transfer function
will be nonzero. The multi-loop synthesis method allows the user to close