Abstract
In this paper, an aircraft roll control system based on autopilot operating conditions is modeled and simu lated using Matlab/Simulink. The modeling phase begins with the derivation of required mathematical model to describe the lateral d irectional motion of an aircraft. Then, Linear Quadratic Regulator (LQR), Fuzzy Logic Controller (FLC) and Self-Tuning Fu zzy Logic Controller (STFLC) are applied for controlling the roll angle o f the modeled aircraft system. Simu lation results of ro ll controllers are presented in time do main and the results obtained with STFLC are co mpared with the results of FLC and LQR. Finally, the performances of roll control systems are analysed in order to decide which control method gives better performance with respect to the desired roll angle. According to simu lation results, it is shown that STFLC deliver better performance than FLC and LQR.
Highlights
The development of autopilots closely followed the successful development of powered man-carry ing airplane by the Wright brothers[1]
The first auto matic flight controller in the world is designed by the Sperry brothers in 1912
Fuzzy Logic Controller (FLC), Self-Tun ing Fuzzy Logic Controller (STFLC) and Linear Quadratic Regulator (LQR) are proposed for the roll control system and ; these controllers are described in detail
Summary
The development of autopilots closely followed the successful development of powered man-carry ing airplane by the Wright brothers[1]. The first auto matic flight controller in the world is designed by the Sperry brothers in 1912. The Sperry brothers developed an autopilot that is sensitive to the movements of an aircraft. To demonstrate the effectiveness of their design, Lawrence Sperry t rimmed his airplane for straight and level flight and engaged the autopilot[1]. The fast advancement of high performance military, co mmercial and general aviation aircraft design has required the develop ment of many technologies; these are aerodynamics, structures, materials, propulsion and flight controls[2]. The aircraft design relies heavily on automatic control systems to monitor and control many of the aircraft subsystems[2]. The development of auto matic control systems has played an important role in the growth of civil and military aviation[1]. Modern aircrafts are much mo re comple x and includes a variety of automatic control system
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