MTech Aircraft Flight Dynamics And Automatic Flight Control syllabus for 3 Sem 2020 scheme 20MAE31

Review of feedback system analysis and aerodynamic fundamentals:

Mathematical models of linear open loop and closed loop systems, Transfer functions and Bode plot and root locus methods of analysis, analysis of multi-loop vehicular control systems; Definition of airframe parameters, coefficients and reference geometries, aerodynamic characteristics of plan forms and fuselage and effectiveness of control surfaces.

Vehicle equations of motion and axis systems:

Newton’s Second Law and reference frames Expansion of inertial forces and moments, gravity forces and their linearization, Expansion of aerodynamic forces and moments and direct thrust forces, Complete linearized equations of motion, description of dimensional and nondimensional stability axis derivatives.

Longitudinal dynamics:

Review of simplifying assumptions and derivation of simplified longitudinal equations of motion, longitudinal controls and control input transfer functions, two degrees of freedom short period approximations and typical example transfer functions of conventional aircraft and their responses Lateral dynamics: Simplified lateral equations of motion, lateral controls and control input transfer functions, two degrees of freedom Dutch roll approximations, typical example transfer functions of conventional aircraft and their responses

Longitudinal and lateral feedback control:

Longitudinal Feedback Control: Feedback of pitch angle and pitch rate to the elevator, feedback of speed error to elevator, feedback of angle of attack and normal acceleration to elevator, feedback of altitude to the elevator Lateral Feedback Control: Feedback of bank angle and rolling velocity to ailerons, feedback of other quantities to ailerons, feedback of heading angle to rudder, feedback of yawing velocity to rudder, feedback of sideslip to rudder, feedback of lateral acceleration to rudder.

Longitudinal and lateral autopilots:

Longitudinal Autopilots: Displacement autopilot, pitch orientational control system, acceleration control system, glide slope coupler and automatic flare control, flight path stabilization, attitude reference systems, effect of nonlinearities. Lateral Autopilots: Damping of Dutch roll, discussion on coordination techniques and methods of obtaining coordination, yaw orientational control system and other lateral autopilot configurations, automatic lateral beam guidance.

Course outcomes:

At the end of the course the student will be able to:

1. Model equations of motion

2. Design Preliminary feedback systems and autopilot design.

3. Distinguish longitudinal and lateral autopilots.

Question paper pattern:

The SEE question paper will be set for 100 marks and the marks scored will be proportionately reduced to 60.

• The question paper will have ten full questions carrying equal marks.
• Each full question is for 20 marks.
• There will be two full questions (with a maximum of four sub questions) from each module.
• Each full question will have sub question covering all the topics under a module.
• The students will have to answer five full questions, selecting one full question from each module.

Textbook/ Textbooks

1 Airplane flight dynamics and automatic flight controls, Part I & II Jan Roskam Design Analysis and Research Corporation (DAR Corporation) 2003

2 Aircraft Dynamics and Automatic Control D McRuer, I Ashkenas and D Graham Princeton University Press, Princeton, New Jersey 1973

Reference Books

1 Automatic Control of Aircraft and Missiles Blake lock J H John Wiley & Sons 1991

2 Aircraft dynamic Stability and Response Babister, A. W Pergamon Press 1980.