National Instruments 370753C-01 Manual De Usuario

Figure 1-5.  Helicopter Velocity Tracking Step Input at the Rotor

You also can look at the gain and phase margins of the system.

H = bode(cl_syscomp2m, {npts = 200, !wrap});

[gm,pm] = margin(H)

There are no 0 dB gain crossings. 

gm (a pdm) =

domain | 

---------+----------

0.250101 | 26.1694

---------+----------

pm is null

The bode plot of the closed-loop system is shown in Figure 1-6.