Research Papers

Online Switching Control of LFT Parameter-Dependent Systems

[+] Author and Article Information
Ke Dong

Research and Development Center, General Motors Corporation, Warren, MI 48090ke.dong@gm.com

Fen Wu

Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695fwu@eos.ncsu.edu

J. Dyn. Sys., Meas., Control 131(2), 021007 (Feb 04, 2009) (7 pages) doi:10.1115/1.3023140 History: Received May 02, 2007; Revised August 01, 2008; Published February 04, 2009

To improve controlled performance and expand gain-scheduling control capability, we propose a switching control approach of linear fractional transformation parameter-dependent systems using multiple Lyapunov functions combined with online control techniques. At each switching instant, a gain-scheduled controller working for the next switching interval will be designed online. The switching control synthesis condition is formulated as linear matrix inequalities and can be solved efficiently, upon which the controller will be constructed. The online switching control scheme is demonstrated using an uninhabited combat aerospace vehicle problem.

Copyright © 2009 by American Society of Mechanical Engineers
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Figure 1

Longitudinal dynamics of UCAV

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Figure 2

Weighted interconnection of the UCAV velocity tracking problem

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Figure 3

Airspeed trajectory for the simulation study

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Figure 4

Tracking response and control input of different switching controllers: (a) vertical velocity, (b) elevator stick input, (c) throttle input, and (d) nozzle angle input



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