Browsing by Author "Usman Inayat"

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    Comparative analysis of eigenstructure assignment and root locus techniques over flight control system
    (UMT.Lahore, 2015) Usman Inayat
    This research work presents a comparative analysis of eigenstructure assignment and root locus technique. The consideration of this research are to design a controller that control a linear time invariant system (LTI) efficiently. The design is done by classical approach of dividing the controller into, a longitudinal control segment and a lateral control segment. Controller ensure that the response time of the system must be minimum and robust. Gain matrix for the controller is calculated by eigenstructure assignment technique. In the purposed eigenstructure assignment technique decoupling is done between modes. The eigenstructure assignment technique is implemented on an aircraft model and also the response time, settling time gain and phase margins are calculated. Finally the results are compared the conventional root locus technique for the control system design for linear time invariant systems (LTI). The model proposed in this research work is implemented in MATLAB – SIMULINK environment.
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    Simulation of autopilot using control system in MATLAB
    (University of Management and Technology, 2012) Usman Inayat
    Autopilot is an automatic flight control system that keeps an aircraft in level flight or on a set course. It can be directed by the pilot, or it may be coupled to a radio navigation signal. Autopilot reduces the physical and mental demands on a pilot and increases safety. The common features available on an autopilot are altitude and heading hold. The simplest systems use gyroscopic attitude indicators and magnetic compasses to control servos connected to the flight control system. The number and location of these servos depends on the complexity of the system. For example, a single-axis autopilot controls the aircraft about the longitudinal axis and a servo actuates the ailerons. A three-axis autopilot controls the aircraft about the longitudinal, lateral, and vertical axes. Three different servos actuate ailerons, elevator, and rudder. More advanced systems often include a vertical speed and/or indicated airspeed hold mode. Advanced autopilot systems are coupled to navigational aids through a flight director. Here we have designed some important auto pilots by using some assumptions and simply following some design rules and procedures of international standards. Resultantly obtaining stability derivatives and then autopilots with some inputs and output responses in Matlab by the help of block diagrams.
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    Simulation of Autopilot using Control System in Matlab
    (UMT Lahore, 2012) Usman Inayat; Muhammad Osama Khalil; Muhammad Usman Baig
    Autopilot is an automatic flight control system that keeps an aircraft in level flight or on a set course. It can be directed by the pilot, or it may be coupled to a radio navigation signal. Autopilot reduces the physical and mental demands on a pilot and increases safety. The common features available on an autopilot are altitude and heading hold. The simplest systems use gyroscopic attitude indicators and magnetic compasses to control servos connected to the flight control system. The number and location of these servos depends on the complexity of the system. For example, a single-axis autopilot controls the aircraft about the longitudinal axis and a servo actuates the ailerons. A three-axis autopilot controls the aircraft about the longitudinal, lateral, and vertical axes. Three different servos actuate ailerons, elevator, and rudder. More advanced systems often include a vertical speed and/or indicated airspeed hold mode. Advanced autopilot systems are coupled to navigational aids through a flight director. Here we have designed some important autopilots by using some assumptions and simply following some design rules and procedures of international standards. Resultantly obtaining stability derivatives and then autopilots with some inputs and output responses in MATLAB by the help of block diagrams.