Specifications

Yaw Damper for a 747 Jet Transport
10-9
bode(sys11)
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).
Root Locus Design
A reasonable design objective is to provide a damping ration with a
natural frequency rad/sec. Since the simplest compensator is a static
gain, first try to determine appropriate gain values using the root locus
technique.
% Plot the root locus for the rudder to yaw channel
ω
1=
ζ
0.35
>
ω
n
1.0
<