Flight Control System for UAV3/29/2024 Despite their success, MBC-based designs rely heavily on the accuracy of the mathematical model of the real plant and they suffer from the explosion of complexity problem. In some newer aircraft models, the quest for reduced weight and the associated fuel savings has led designers to replace most of the mechanical components with computers and fiber optics to produce control systems which are referred to as Fly-By-Wire. Model-Based Control (MBC) techniques have dominated flight controller designs for Unmanned Aerial Vehicles (UAVs). In larger and faster aircraft, the aerodynamic forces become too great for the pilot to overcome without assistance so hydraulic systems are often incorporated to move the flight control surface. In this design, a collection of mechanical components such as cables, pulleys, rods and chains transmit the movement of the flight deck controls to the appropriate control surface(s). The most basic flight control systems are mechanical and, although they date back to the earliest aircraft types, are in use in the majority of light, general aviation aircraft. The ailerons control motion around the longitudinal axis (roll), the elevator controls rotation around the lateral axis (pitch) and the rudder controls movement around the vertical axis (yaw). Movement of any of the primary flight controls causes the aircraft to rotate around the axis of rotation associated with the control surface. Secondary flight controls are intended to improve the aircraft performance characteristics or to relieve excessive control loading, and consist of high lift devices such as slats and flaps as well as flight spoilers and trim systems.ī727 Flight Control Surfaces. Primary flight controls are required to safely control an aircraft during flight and consist of ailerons, elevators (or, in some installations, stabilator) and rudder. Aircraft flight controls are the means by which a pilot controls the direction and attitude of an aircraft in flight.įlight control systems are subdivided into what are referred to as primary and secondary flight controls.
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