MATLAB CONTROL SYSTEM TOOLBOX 9 Especificações descarregar pdf (Página 224)

100

101

10 Design Case Studies

10-40

bode(Px(1,2:3),'--',clx(1,2:3),'-',{0.1 100})

The dashed lines show the open-loop response. Note that the peak gain of the

eccentricity-to-gap response and the low-frequency gain of the

input-thickness-to-gap response have been reduced by about 20 dB.

Finally, use

lsim to simulate the open- and closed-loop time responses to the

white noise inputs and . Choose

dt=0.01 as sampling period for the

simulation, andderive equivalent discrete white noise inputs for this sampling

rate.

dt = 0.01

t = 0:dt:50 % time samples

% Generate unit-covariance driving noise wx = [w-ex;w-ix].

% Equivalent discrete covariance is 1/dt

wx = sqrt(1/dt) * randn(2,length(t))

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