Nonlinear Control Strategies for Aircraft Path Following N. Harris - - PowerPoint PPT Presentation

Nonlinear Control Strategies for Aircraft Path Following

• N. Harris McClamroch

Department of Aerospace Engineering University of Michigan Ann Arbor, MI 48109 December 12, 2006

• S. A. Al-Hiddabi and N. H. McClamroch, “Aggressive Longitudinal Aircraft Trajectory Tracking

using Nonlinear Control,” J. Guidance, Control and Dynamics, Vol. 25, No. 1, January-February, 2002, 26-32.

• S. A. Al-Hiddabi and N. H. McClamroch, "Tracking and Maneuver Regulation Control for

Nonlinear Non-minimum Phase Systems: Application to Flight Control," IEEE Transactions on Control Systems Technology, Vol. 10, No. 6, 2002, 780-792.

Main Themes of the Presentation Nonlinear flight models Multivariable models Non-minimum phase models Two-time scale models Nonlinear flight control objectives Output tracking Maneuver regulation

Nonlinear control approach Decomposition of minimum phase and non-minimum phase parts Feedforward control Solve a stable noncausal inversion problem Feedback control High gain feedback for the minimum phase part LQR feedback for the non-minimum phase part

Output tracking that combines feedforward and feedback Maneuver regulation controller Flight Illustrations VTOL aircraft control along a circular path in vertical plane CTOL aircraft control along nap-of-Earth flight path