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Chapter 5 Robust Performance Tailoring with Tuning - SSL - MIT

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Magnitude, OPD/F x [µm/N]<br />

Magnitude, OPD/T z [µm/Nm]<br />

10 2<br />

10 0<br />

10 −2<br />

10 2<br />

10 0<br />

10 −2<br />

10 −4<br />

10 −2<br />

10 −2<br />

10 0<br />

Frequency (Hz)<br />

(a)<br />

10 0<br />

Frequency (Hz)<br />

(c)<br />

10 2<br />

10 2<br />

Magnitude, OPD/F y [µm/N]<br />

Norm. Cum. Var. [µm 2 ]<br />

PSD [µm 2 /Hz]<br />

10 5<br />

10 0<br />

10 −5<br />

10 −10<br />

1<br />

0.5<br />

0<br />

10 10<br />

10 5<br />

10 0<br />

10 −5<br />

10 −2<br />

10 −2<br />

10 0<br />

Frequency (Hz)<br />

(b)<br />

10 0<br />

Frequency [Hz]<br />

10 2<br />

Nominal PT<br />

Worst−Case PT<br />

Figure 3-2: Comparison of nominal PT model (–) and PT model at worst-case uncertainty<br />

vertices(- -): (a) frequency response function, Fx to σz (b) frequency response<br />

function, Fy to σz (c) frequency response function, Tz to σz and (d) cumulative variance<br />

and output PSD.<br />

79<br />

(d)<br />

10 2

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