Flight Dynamics II - Stability

COURSE OUTLINE: Airplane nomenclature and aerodynamics, Review of basics of rigid body dynamics, Concepts of static and dynamic stability, Need for stability in an airplane, Purpose of controls, Inherently and marginally stable airplanes, Longitudinal, and Lateral directional static stability. Stick Fixed: Basic equations of equilibrium, stability criterion, Wing and tail moments, Effects of fuselage and nacelles. Effects of c.g.location, control effectiveness, hinge moment, tabs, aerodynamic balancing, Power effects. Stabilizer setting and c.g.location, Elevator effects, Stick fixed neutral point, Determination of neutral points and maneuver points in-flight tests.

Stick Free: Hinge moment coefficients, Stick free neutral point, symmetric maneuvers, Stick force gradients and stick force per g. Dihedral effect, Coupling between rolling moment and yawing moment, Adverse yaw, Aileron power. Aileron reversal. Weathercock effect, Rudder requirements. One engine inoperative conditions, Rudder lock.

Equations of motion, equations of motion of a disturbed aircraft, aircraft dynamic modes and stability criterion, Stability derivatives, Control derivatives, Routh's discriminant, solving the stability quartic, Phugoid motion, Factors affecting the period and damping. Dutch roll and spiral instability. Longitudinal & lateral directional dynamic modes. Effect of maneuvers, Airplane response to atmospheric and control inputs, Introduction to flying qualities and stability augmentation systems. Aircraft autopilot design using classical control theory. Introduction to nonlinear problems in aircraft flight dynamics.

Mod-01 Lec-01 Earth Atmosphere,Aircraft components,Aircraft nomenclature.
Mod-01 Lec-02 Basic aerodynamics.
Mod-02 Lec-03 Equilibrium and stability.
Mod-02 Lec-04 Static vs dynamic stability.
Mod-03 Lec-05 Criterion for stability,Wing contribution.
Mod-03 Lec-06 Horizontal tail contribution.
Mod-03 Lec-07 Wing plus tail contribution.
Mod-04 Lec-08 Static margin and CG limits.
Mod-04 Lec-09 Fuselage contribution.
Mod-04 Lec-10 Powerplant contribution.
Mod-04 Lec-11 Power effects on neutral point.
Mod-05 Lec-12 Elevator.
Mod-05 Lec-13 Stick free stability, Most fwd CG location.
Mod-05 Lec-14 Longitudinal stick force per 'g', Ground effect.
Mod-06 Lec-15 Control requirement, Pull-up maneuver, Maneuver point.
Mod-06 Lec-16 Elevator per 'g' , Maneuver point.
Mod-06 Lec-17 Example problems.
Mod-07 Lec-18 Lateral-Directional Stability Derivatives, Fuselage/Vertical fin contribution.
Mod-07 Lec-19 Roll stability, Wing sweep effect, Rudder.
Mod-07 Lec-20 Dihedral effect, Various contributions.
Mod-07 Lec-21 Power effects, Roll control, Aileron.
Mod-07 Lec-22 Example problems.
Mod-08 Lec-23 Derivation of Translational Motion Equations.
Mod-08 Lec-24 Derivation of Angular Motion Equations.
Mod-08 Lec-25 Description of various forces and moments.
Mod-08 Lec-26 Nonlinearities and Associated Aircraft Behavior.
Mod-09 Lec-27 Small perturbation method, Linearization of equations.
Mod-09 Lec-28 Aerodynamic force and Moment Derivatives.
Mod-09 Lec-29 Contribution of Aircraft components to Aerodynamic Derivatives.
Mod-09 Lec-30 Linear Model and Aircraft Dynamics Modes.
Mod-10 Lec-31 Short Period, Phugoid(Lanchester's formulation).
Mod-10 Lec-32 Short period mode approximation.
Mod-10 Lec-33 Flying and Handling Qualities, Cooper Harper Scale.
Mod-11 Lec-34 Pure rolling motion, Pure yawing motion,Spiral approximation.
Mod-11 Lec-35 Spiral, Roll, Dutch roll Mode approximations.
Mod-11 Lec-36 Lateral directional Flying Qualities, Routh's Stability criterion.
Mod-11 Lec-37 Stability in Steady Roll Maneuver.
Mod-12 Lec-38 Wind Effect on Aircraft Pure Plunging Motion.
Mod-12 Lec-39 Wind Profiles, Longitudinal Mode Response to Wind Shear.
Mod-13 Lec-40 Stability control/Augmentation.
Mod-13 Lec-41 Autopilots, Automatic Landing System.