User`s guide

9 Design Case Studies
9-8
Typically, yaw dampers are designed using the yaw rate as sensed output and
the rudder as control input. Look at the corresponding frequency response
(input 1 to output 1).
bode(sys(1,1))
From this Bode diagram, you can see that the rudder has significant effect
around the lightly damped Dutch roll mode (that is, near rad/sec). To
make the design easier, select the subsystem from rudder to yaw rate.
% Select system with input 1 and output 1
sys11 = sys(1,1);
ω
1
=