AERO 480 and MECH 6091-Flight
Control Systems Lecture 9- Flight Control-
Basic Longitudinal-LateralAutopilot Systems Prof.
Youmin Zhang
Prof. Youmin Zhang
November 20, 2023
,Introduction Pitch attitude hold mode Lateral: Roll angle hold mode Lateral: Coordi
Introduction
After this lecture you will know about:
Longitudinal control/hold functions
Pitch attitude control - Phugoid suppression
Altitude control and glide path control
Airspeed control
Climb or descent rate control
Lateral control/hold functions
Roll angle hold mode Coordinated
roll angle hold modeHeading angle
hold mode
Summary
,Introduction Pitch attitude hold mode Lateral: Roll angle hold mode Lateral: Coordi
Introduction
A typical flight control system (FCS):
, Introduction Pitch attitude hold mode Lateral: Roll angle hold mode Lateral: Coordi
Introduction
The inner loop provides stability augmentation and is usually regarded as
essential for continued proper operation of the aircraft. The inner loop
control system alone comprises the stability augmentation system (SAS), it is
usually the first part of the FCS to be designed and together with theairframe
comprises the augmented aircraft.
The outer loop provides the autopilot which, as its name suggests, enables
the pilot to fly various manoeuvres under automatic control. Although
necessary for operational reasons, an autopilot is not essential for the provision
of a safe well behaved aircraft. The autopilot control modes are designed to
function with the augmented aircraft and may be selectively engaged as
required to automate the piloting task. Their use isintended to release the
pilot from the monotony of flying steady conditions manually and to fly
precision manoeuvres in adverse conditionswhich may be at, or beyond, the
limits of human capability. Autopilot control modes vary from the very simple,
for example height hold, to the very complex, for example automatic landing.