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Chapter 12 LQG/H-Infinity Synthesis
© National Instruments Corporation 12-5 Xmath Interactive Control Design Module
The weights ρ
u, i
, ρ
y, j
, ρ
u
,andρ
y
are then replaced with noise variances
ν
u, i
, ν
y, j
, ν
u
,andν
y
. The noise level parameter in the main LQG/H∞
window is related to the noise levels in this window by υ = υ
y
/υ
u
.
Decay Rate Window
The Decay Rate window is shown in Figure 12-3. From top to bottom, it
consists of:
• A menu bar with entries Special, Edit, View, and Help.
• A plotting area that contains two plots:
– A plot of controller poles, and a vertical line indicating the
decay rate.
– A plot of estimator poles, and a vertical line indicating the
decay rate.
Figure 12-3. LQG/H-Infinity Decay Rate Window
H-Infinity Performance Window
The H∞ Performance window, shown in Figure 12-4, consists of, from top
to bottom:
• A menu bar with entries Special, Edit, View, and Help.
• A plot area that contains a plot of the closed-loop transfer matrix along
with the parameter γ, which can be grabbed and dragged to a new