Bifurcation analysis of the generic transport model for open-loop and closed-loop configurations

Stephen J Gill; Mark H Lowenberg; Luis Crespo; Simon A Neild; Bernd Krauskopf; Guilhem Puyou

doi:10.2514/6.2013-5080

Bifurcation analysis of the generic transport model for open-loop and closed-loop configurations

Stephen J Gill, Mark H Lowenberg, Luis Crespo, Simon A Neild, Bernd Krauskopf, Guilhem Puyou

Dynamics and Control

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

1 Citation (Scopus)

Abstract

The paper evaluates the influence on off-nominal flight dynamics charac- teristics when closing the loop on an aircraft model with a feedback feedfor- ward control law. Of particular interest is the departure/upset behaviour of the closed-loop system near stall. The study vehicle is the NASA Generic Transport Model (GTM) and both fixed-gain and gain-scheduled versions of a LQR-PI controller are evaluated. The differences in effectiveness of the controllers are first demonstrated using time responses to fixed com- mands. Then, bifurcation analysis is used to characterize spiral and spin behaviour of the open-loop system, after which the influence of closing the loop on the system bifurcation diagram is shown. This yields an under- standing of the dynamics underlying both the open-loop and closed-loop system under off-nominal conditions, and hence a means of assessing the effects of varying the controller gains on the upset tendencies of the aircraft.

Original language	English
Title of host publication	Proceedings of the 2013 AIAA Atmospheric Flight Mechanics Conference
Publisher	American Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages	23
DOIs	https://doi.org/10.2514/6.2013-5080
Publication status	Published - Aug 2013
Event	AIAA Atmospheric Flight Mechanics (AFM) Conference - Boston, MA, United States Duration: 19 Aug 2013 → 22 Aug 2013

Conference

Conference	AIAA Atmospheric Flight Mechanics (AFM) Conference
Country/Territory	United States
City	Boston, MA
Period	19/08/13 → 22/08/13

Research Groups and Themes

Engineering Mathematics Research Group

Keywords

Aircraft dynamics
Airliner upset
Bifurcation analysis
Control laws

Access to Document

10.2514/6.2013-5080

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Gill, S. J., Lowenberg, M. H., Crespo, L., Neild, S. A., Krauskopf, B., & Puyou, G. (2013). Bifurcation analysis of the generic transport model for open-loop and closed-loop configurations. In Proceedings of the 2013 AIAA Atmospheric Flight Mechanics Conference Article AIAA-2013-5080 American Institute of Aeronautics and Astronautics Inc. (AIAA). https://doi.org/10.2514/6.2013-5080

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title = "Bifurcation analysis of the generic transport model for open-loop and closed-loop configurations",

abstract = "The paper evaluates the influence on off-nominal flight dynamics charac- teristics when closing the loop on an aircraft model with a feedback feedfor- ward control law. Of particular interest is the departure/upset behaviour of the closed-loop system near stall. The study vehicle is the NASA Generic Transport Model (GTM) and both fixed-gain and gain-scheduled versions of a LQR-PI controller are evaluated. The differences in effectiveness of the controllers are first demonstrated using time responses to fixed com- mands. Then, bifurcation analysis is used to characterize spiral and spin behaviour of the open-loop system, after which the influence of closing the loop on the system bifurcation diagram is shown. This yields an under- standing of the dynamics underlying both the open-loop and closed-loop system under off-nominal conditions, and hence a means of assessing the effects of varying the controller gains on the upset tendencies of the aircraft.",

keywords = "Aircraft dynamics, Airliner upset, Bifurcation analysis, Control laws",

author = "Gill, \{Stephen J\} and Lowenberg, \{Mark H\} and Luis Crespo and Neild, \{Simon A\} and Bernd Krauskopf and Guilhem Puyou",

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Gill, SJ, Lowenberg, MH, Crespo, L, Neild, SA, Krauskopf, B & Puyou, G 2013, Bifurcation analysis of the generic transport model for open-loop and closed-loop configurations. in Proceedings of the 2013 AIAA Atmospheric Flight Mechanics Conference., AIAA-2013-5080, American Institute of Aeronautics and Astronautics Inc. (AIAA), AIAA Atmospheric Flight Mechanics (AFM) Conference, Boston, MA, United States, 19/08/13. https://doi.org/10.2514/6.2013-5080

Bifurcation analysis of the generic transport model for open-loop and closed-loop configurations. / Gill, Stephen J; Lowenberg, Mark H; Crespo, Luis et al.
Proceedings of the 2013 AIAA Atmospheric Flight Mechanics Conference. American Institute of Aeronautics and Astronautics Inc. (AIAA), 2013. AIAA-2013-5080.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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AU - Krauskopf, Bernd

AU - Puyou, Guilhem

PY - 2013/8

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N2 - The paper evaluates the influence on off-nominal flight dynamics charac- teristics when closing the loop on an aircraft model with a feedback feedfor- ward control law. Of particular interest is the departure/upset behaviour of the closed-loop system near stall. The study vehicle is the NASA Generic Transport Model (GTM) and both fixed-gain and gain-scheduled versions of a LQR-PI controller are evaluated. The differences in effectiveness of the controllers are first demonstrated using time responses to fixed com- mands. Then, bifurcation analysis is used to characterize spiral and spin behaviour of the open-loop system, after which the influence of closing the loop on the system bifurcation diagram is shown. This yields an under- standing of the dynamics underlying both the open-loop and closed-loop system under off-nominal conditions, and hence a means of assessing the effects of varying the controller gains on the upset tendencies of the aircraft.

AB - The paper evaluates the influence on off-nominal flight dynamics charac- teristics when closing the loop on an aircraft model with a feedback feedfor- ward control law. Of particular interest is the departure/upset behaviour of the closed-loop system near stall. The study vehicle is the NASA Generic Transport Model (GTM) and both fixed-gain and gain-scheduled versions of a LQR-PI controller are evaluated. The differences in effectiveness of the controllers are first demonstrated using time responses to fixed com- mands. Then, bifurcation analysis is used to characterize spiral and spin behaviour of the open-loop system, after which the influence of closing the loop on the system bifurcation diagram is shown. This yields an under- standing of the dynamics underlying both the open-loop and closed-loop system under off-nominal conditions, and hence a means of assessing the effects of varying the controller gains on the upset tendencies of the aircraft.

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KW - Airliner upset

KW - Bifurcation analysis

KW - Control laws

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BT - Proceedings of the 2013 AIAA Atmospheric Flight Mechanics Conference

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T2 - AIAA Atmospheric Flight Mechanics (AFM) Conference

Y2 - 19 August 2013 through 22 August 2013

ER -

Bifurcation analysis of the generic transport model for open-loop and closed-loop configurations

Abstract

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Research Groups and Themes

Keywords

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