Flexibility and aeroelastic behaviors in large space structures can lead to degradation of control system stability and performance. The model reference adaptive notch filter is an effective methodology used and implemented for reducing such effects. In this approach, designing a model reference for adaptive control algorithm in a flight device such as a launch vehicle is very important. In this way, the vibrations resulting from the structure flexibility mostly affects the pitch channel, and its influences on the yaw channel are negligible. This property is used and also the symmetrical behavior of the yaw and pitch channels. In this paper, by using this property and also the symmetrical behavior of the yaw and pitch channels, a new model reference using identification on the yaw channel is proposed. This model behaves very similar to the rigid body dynamic of the pitch channel and can be used as a model reference to control the vibrational effects. Simulation results illustrated applies the proposed algorithm and considerably reduces the vibrations in the pitch channel. Moreover, the main advantage of this new method is the online tuning of the model reference against unforeseen variations in the parameters of the rigid launch vehicle, which has not been considered in the previous works. Finally, robustness of the new control system in the presence of asymmetric behavior is investigated.
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e-mail: khoshnood@dena.kntu.ac.ir
e-mail: roshanian@kntu.ac.ir
e-mail: jafari@kntu.ac.ir
e-mail: sedigh@kntu.ac.ir
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July 2010
Research Papers
An Adjustable Model Reference Adaptive Control for a Flexible Launch Vehicle
A. M. Khoshnood,
A. M. Khoshnood
Department of Mechanical Engineering,
e-mail: khoshnood@dena.kntu.ac.ir
K. N. Toosi University of Technology
, P.O. Box 19395-1999, Tehran 19991 43344, Iran
Search for other works by this author on:
J. Roshanian,
J. Roshanian
Department of Aerospace Engineering,
e-mail: roshanian@kntu.ac.ir
K. N. Toosi University of Technology
, P.O. Box 16765-3381, Tehran, Iran
Search for other works by this author on:
A. A. Jafari,
A. A. Jafari
Department of Mechanical Engineering,
e-mail: jafari@kntu.ac.ir
K. N. Toosi University of Technology
, P.O. Box 19395-1999, Tehran 19991 43344, Iran
Search for other works by this author on:
A. Khaki-Sedigh
A. Khaki-Sedigh
Department of Electrical Engineering,
e-mail: sedigh@kntu.ac.ir
K. N. Toosi University of Technology
, P.O. Box 16315-1355, Tehran, Iran
Search for other works by this author on:
A. M. Khoshnood
Department of Mechanical Engineering,
K. N. Toosi University of Technology
, P.O. Box 19395-1999, Tehran 19991 43344, Irane-mail: khoshnood@dena.kntu.ac.ir
J. Roshanian
Department of Aerospace Engineering,
K. N. Toosi University of Technology
, P.O. Box 16765-3381, Tehran, Irane-mail: roshanian@kntu.ac.ir
A. A. Jafari
Department of Mechanical Engineering,
K. N. Toosi University of Technology
, P.O. Box 19395-1999, Tehran 19991 43344, Irane-mail: jafari@kntu.ac.ir
A. Khaki-Sedigh
Department of Electrical Engineering,
K. N. Toosi University of Technology
, P.O. Box 16315-1355, Tehran, Irane-mail: sedigh@kntu.ac.ir
J. Dyn. Sys., Meas., Control. Jul 2010, 132(4): 041010 (7 pages)
Published Online: June 18, 2010
Article history
Received:
December 25, 2008
Revised:
February 11, 2010
Online:
June 18, 2010
Published:
June 18, 2010
Citation
Khoshnood, A. M., Roshanian, J., Jafari, A. A., and Khaki-Sedigh, A. (June 18, 2010). "An Adjustable Model Reference Adaptive Control for a Flexible Launch Vehicle." ASME. J. Dyn. Sys., Meas., Control. July 2010; 132(4): 041010. https://doi.org/10.1115/1.4001709
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