Investigation and Control of The Axes of Aircraft Using Linear Quadratic Regulator and Sliding Mode Controller

Abstract

ABSTRACT newlineThe automatic flight control system of an aircraft is very complicated in newlinenature with lot of logics and operational constraints. The study of the detailed newlineautomatic flight control and automatic thrust control systems of a modern aircraft newlineinvolves many steps right from the study of different sensors used to sense different newlineparameters for the effective control of the system to the advanced actuators used to newlineimplement the commands. The autopilot is a system used to control the path of the newlinevehicle without constant hands on control by a human operator being required. It is a newlinedevice used for helping the pilot to monitor the overall status of the aircraft. This newlineprevents the pilot from constantly working to control the altitude and flying a non newlineprecision approach. The auto pilot can operate independently, controlling the heading newlineand altitude or it can be coupled to a navigation system and fly a programmed course newlineor an approach with glide slope. They are set of servo actuators which does the newlinecontrol movement of the control circuit to trigger the servo actuator to make a newlinemovement of the corrected amount of the chosen task. Most of the autopilots can fly newlinea straight and level flight. But when there are additional tasks of searching a selected newlinecourse, altitude changes or tracking the sources of navigation etc., then the higher newlinelevel calculations are required. All the above aspects of an autopilot system are newlinestudied with special emphasis on the redesign of the automatic flight control system newlineusing robust methods. The main aim is to design an automatic control for a general newlineaviation aircraft with the objective of controlling the pitch, roll and yaw axes of the newlineaircraft. For this, the robust control methodologies are designed and developed with newlinethe formulation of the mathematical model of the general aviation aircraft. Two newlineadvanced control methodologies, the Linear Quadratic Regulator and the Sliding newlineMode Controller are used to design the automatic control system for controlling the newlinethree axes of the aircraft. The Sli