Online Model Identification Of Open-Channel System With High Order IDZ Model

In the control of open-channel, it is difficult to estimate wave propergation time because of the complexity of reflection, superposition and energy attenuation of shallow water waves. Although Saint-Venant equation have reasonable accuracy in describing the motion law of unsteady flow, mathematical...

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Bibliographic Details
Published in:MATEC web of conferences 2018-01, Vol.246, p.1036
Main Authors: Liao, Wenjun, Guan, Guanghua, Zhong, Le, Xiao, Changcheng, Zhong, Ke, Huang, Huiyong
Format: Article
Language:English
Subjects:
Accuracy
Canals
Control systems design
Controllers
Design optimization
Frequencies
Parameter identification
Partial differential equations
Shallow water
Unsteady flow
Water discharge
Water intakes
Water levels
Water waves
Wave attenuation
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Summary:In the control of open-channel, it is difficult to estimate wave propergation time because of the complexity of reflection, superposition and energy attenuation of shallow water waves. Although Saint-Venant equation have reasonable accuracy in describing the motion law of unsteady flow, mathematically it is the first order quasilinear hyperbolic partial differential equations which makes it difficult to be used as control model in the design optimized controller. The Channel Integrator Delay Zero (IDZ) model linearizes the Saint-Venant equation and ensures the accuracy of the response of water level and discharge in high frequency band. However, there is still a considerable difference between the theoretical value and the actual response. In order to avoid this difference caused by theoretical derivation, this paper uses the single channel model of Zhanghe Irrigation District to play online identification of the relevant parameters by using the existing periodic response process of the canal system. The reliability of model identification under step water intake is verified, and the effect of this method on periodic water intakes in long channel is verified. The results show that the identified model can catch most dynamic action of the canal system with water intakes, which ensures its validity to be used for controller design. Meanwhile, it is simple in application.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/201824601036