- Question 3 The Roll Response To Aileron Control Of A Military Reconnaissance Plane In A Flight Condition For Precision T 1 (69.25 KiB) Viewed 21 times
- Question 3 The Roll Response To Aileron Control Of A Military Reconnaissance Plane In A Flight Condition For Precision T 2 (67.33 KiB) Viewed 21 times
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Question 3 The roll response to aileron control of a military reconnaissance plane in a flight condition for precision target tracking mission is given by the following open loop transfer function: 0(s) -0.726(s2 + 0.421 s + 0.889) (s) (s + 0.013)(8 + 1.121) (82 +0.22 s + 0.99) = Appraise the Dutch-roll mode of the aircraft by computing the oscillation frequency and damping ratio. (8 marks) (b) Analyse rate the flying quality level of the aircraft based on MIL8785C. Please state the class of aircraft, and category of flight that the flying quality is evaluated against. (3 marks) C Analyse the steady state bank angle of the aircraft when an impulse aileron input is applied. (3 marks) (d) Analyse the closed loop transfer function using a simple bank angle feedback in Figure Q3(d). (6 marks) De ६ 0 φ Ка + Figure Q3(d)
(e) Figure Q3(e) shows the root locus plot of the closed loop characteristic is as follow. If a gain of 21.1 is chosen, compare the flying quality of the aircraft between the closed loop and open loop control. (5 marks) 1.5 0.32 System: fclose .ocus Gain: 21.1 Pole: -0.188 +0.923i 1.4) 0.115 0.07 0.035 Damping: 0.2 1.2 Overshoot (%): 52.7 Frequency (rad/s): 0.942 1 0.48 0.8 0.6 0.5 0.75 0.4 0.2 Imaginary Axis (seconds) 0.2 0.75 0.4 -0.5 0.6 0.48 0.8 -1 0.23 -1.5 0.32 -0.5 1.2 0.16 0.115-0.07 0.035 -0.3 -0.2 -0.1 0 Real Axis (seconds) -0.4 0.1 Figure Q3(e)