Multivariable linear controllers were used at 4 points between hover and forward flight. The inner loop pitch rate feedback was used to reduce the pitching moment due to thrust changes. The control system used 3input, 3output H infinity loop shaping to control the forward acceleration and incidence. Classical loop-shaping techniques were used to select weights. The gain schedule for the flight envelope was developed with 4 linear points. The controller was implemented in observer form and it used interpolated gains and outputs. The H-infinity loop shaping was used for an integrated flight and propulsion control system.
Sources
“Flight Control Law Design: An Industry Perspective – ppt video online download.” Accessed: Feb. 11, 2023. [Online]. Available: https://slideplayer.com/slide/5738737/
Backlinks
[[Converting a Transfer Function to an Observable Canonical State-Space Model]]
Gain Scheduling
[[H-Infinity]]
[[Interactive Loop Shaping]]
[[VAAC Program]]