Case study carried out to analyze longitudinal dynamics and longitudinal equations of motion for the aircraft are considered.
Case Study: Aircraft Pitch Control
• To analyse longitudinal dynamics.
• the longitudinal equations of motion for the aircraft are considered.
Assumptions:
• Aircraft is in steady-cruise at constant altitude and velocity; thus, the thrust, drag, weight and lift forces balance each other in the x- and y-directions • a change in pitch angle will not change the speed of the aircraft,
• input will be the elevator deflection angle ‘delta’ and putput is pitch angle ‘q’ of the aircraft.
Analysis Carried out:
• Open Loop Response, Closed loop response, PID Controller Design, Controller Design using root-locus approach, LQR Design, Controller Design Via. Pole placement techniques.
Tools Used to implement:
MATLAB, Simulink, Flightgear.
Source: Control Tutorials by Michigan Uniiversity https://ctms.engin.umich.edu/CTMS/index.php?example=AircraftPitch§ion=ControlDigital
Root-Lcus Based Controller: https://youtu.be/3NLoPjOPmdU
PID Controller: https://youtu.be/vxDltsTVl0I
LQR Controller: https://youtu.be/lU_aUMX9794
Lead Compensator: https://youtu.be/ShmrshB9eOU
Interested to work on this?