ETTC'2003 - SEE

M r
Mmax
(0 dB, -180°)
b = 0
a
ωcg
M r
M max
(0 dB, -180°)
b Mr
ETTC2003 European Test and Telemetry Conference
ω cg
a
M max
(0 dB, -180°)
(a) (b) (c)
Figure 4 – Optimal open-loop Nichols locus to position the uncertainty domains
In the example of the test-bench, figure 4 presents the optimal open-loop
Nichols with the uncertainty domains computed the various operating points and
the various parameters of the structure to be tested.
Magnitude dB)
40
20
0
-20
-40
-60
-80
-100
-120
-140
-400 -350 -300 -250 -200 -150 -100
Phase (deg)
Figure 4 – Optimal open-loop Nichols locus of the test-bench
a optimal
ω cg
b optimal