Simulink Control Design™ - MathWorks

Attitude Control in the HL-20 Autopilot - MIMO Design

This is Part 4 of the example series on design and tuning of the flight control system for

the HL-20 vehicle. This part shows how to tune a MIMO PI architecture for controlling

the roll, pitch, and yaw of the vehicle.

Background

This example uses the HL-20 model adapted from “NASA HL-20 Lifting Body Airframe”

(Aerospace Blockset), see Part 1 of the series (“Trimming and Linearization of the HL-20

Airframe” (Control System Toolbox)) for details. In Parts 2 and 3, we showed how to close

the inner loops and tune the outer loops of a classic SISO architecture for the HL-20

autopilot, see “Angular Rate Control in the HL-20 Autopilot” (Control System Toolbox) and

“Attitude Control in the HL-20 Autopilot - SISO Design” (Control System Toolbox) for

details. In this example, we explore the benefits of switching to a MIMO architecture for

the outer loops.

11 Gain-Scheduled Controllers