Problem 2: Consider the mechanical closed loop control of a flight control surface shown in Fig. 1.9. Explain how the mechanical control system works. Modify the components of this system with an electro-mechanical control system involving a digital controller, electrically actuated proportional valve, and sensors. Show the components in the modified system and explain how they would function using a block diagram. Discuss how this might work with an auto-pilot control algorithm conceptually. Discuss who a pilot lever command simply desired direction of the airplane, how these commands can be translated to desired control surface positions, and how that system works with this controller. Lever x(t) z(t) Valve y(t) Cylinder Weng 3 Figure 1.9: Closed loop flight control surface position control with mechanical feedback.