Robust continuous velocity control of convective spatially distributed systems |
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Authors: | J Paulo García-Sandoval Víctor González-Álvarez Carlos Pelayo-Ortiz |
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Affiliation: | Chemical Engineering Department, University of Guadalajara, Calz. Gral. Marcelino García Barragán 1451, Guadalajara, Jalisco 44430, México |
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Abstract: | In this work a robust nonlinear scheme is proposed to control spatially distributed convective systems described by first-order hyperbolic partial differential equations by manipulating the flow velocity. The proposed scheme is designed after the method of characteristics is used to establish key structural properties of the system dynamics. The resulting feedback control, which can be seen as a proportional integral controller with variable integration time, does not require measurements for several axial points nor infinite dimensional state estimations. The proposed controller is applied successfully to two heat exchange simulation examples and a nonisothermical plug flow reactor. It is shown that it is robust in the face of uncertain parameters and load disturbances. Finally, the performance of the robust controller is compared to other control applications. |
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Keywords: | Feedback control Distributed parameter systems Hyperbolic PDE Method of characteristic Nonlinear robust control |
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