Question

Problem 2: Aircraft Example The following figure shows the coordinate axes and forces acting on the aircraft in the longitudinal plane of motion. Assuming that the aircraft is cruising at constant velocity and altitude. Plot the Bode diagram of the following G(s): 1. G(s) representing the aircraft pitch angle response output to the elevator deflection input: O(s) A(s) 1.1057s +0.1900 93 +0.7385s2 + 0.8008s 2. G(s) representing the aircraft altitude response output to the elevator deflection input: H(s) 1.1057s – 0.1900 G(S) = A(s) – 55 + 17.9554 + 123.353 + 366.352 + 112.2s

Answer 1

1)) the bode plot by matlab

Bode plot: magnitude (dB) 0.01 0. 1 0.1 1 10 phase (degrees) 0.01 0.1 10 Ys frequency US)

2))

magnitude (dB) - 150 -2007 0.001 0.01 0.1 1 10 100 phase (degrees) - 400 0.001 0.01 10 0. 1 1 frequency 100 - Ys US