
Saunder January 22, 2014 10:43 K15053˙Book
Disturbance Rejection for Airbreathing Hypersonic Vehicles 289
(a)
0 30 60 90 120 150
1.5
1.505
1.51
1.515
1.52
× 10
4
Time, sec
Velocity V, ft/s
(b)
0 30 60 90 120 150
1.09
1.1
1.11
1.12
1.13
1.14
× 10
5
Time, sec
Altitude h, ft
(c)
0 30 60 90 120 150
−0.1
−0.05
0
0.05
0.1
0.15
Time, sec
Elevator deection δ
e
, rad
Figure 16.1 Variable response curves in the presence of unknown external distur-
bances under the proposed NDOBC (solid line) and baseline control (dashed line)
methods. The tracking commands are denoted by dash-dotted line. (Continued)