Alternate Plant Window; Role And Use Of Plant And Alternate Plant; Displaying The Alternate Plant Responses - National Instruments Xmath Interactive Control Design Module ICDM User Manual

Alternate Plant Window

Role and Use of Plant and Alternate Plant

Displaying the Alternate Plant Responses

© National Instruments Corporation
This chapter describes the form of the Alternate Plant window used for
SISO design; refer to Chapter 11,
form used for MIMO design.
In addition to the plant P, ICDM can optionally maintain an alternate plant
P . These two transfer functions have different uses and purposes:
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• The plant is always used for the synthesis windows (that need it). For
example, when synthesizing an LQG controller, the LQG synthesis is
based on the plant P. In other words, the plant is used for design. In
contrast, the alternate plant P
• The alternate plant P
turning on the Alternate Plant display (refer to the Displaying the
Alternate Plant Responses section) the plots in the ICDM Main
Window will show the alternate plant connected with the current
controller and the plant connected with the current controller.
• It is not possible to change the plant in ICDM except by reading it from
Xmath. In contrast, the alternate plant can be manipulated using the
Alternate Plant window.
You can think of the plant P as the plant model used for control system
design, and the alternate plant P
system validation.
The ICDM Main window plots always show the response of the controller
connected with the plant. By turning on the Alternate Plant display, the
responses of the controller with the alternate plant also are shown in these
plots.
You always can use data-viewing to determine which plot corresponds to
the plant and which corresponds to the alternate plant.
10-1
Introduction to MIMO
is never used by any synthesis method.
alt
is used only for analysis. Specifically, by
alt
as the plant model used for control
alt
Xmath Interactive Control Design Module
10
Design, for the