4.2 Article

Three-Tank Process Level Control based on a Nonlinear Observer

期刊

IETE JOURNAL OF RESEARCH
卷 -, 期 -, 页码 -

出版社

TAYLOR & FRANCIS LTD
DOI: 10.1080/03772063.2021.2016501

关键词

Filtered high-gain observer; Flatness control; Nonlinear continuous-discrete-time observer; PID control; Three-tank system

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This paper investigates the design and hardware implementation of the control level for the three-tank system, considering modeling error and unavoidable disturbances. By designing a new controller, the closed-loop is able to meet two reference levels, and a high-gain observer is utilized to estimate the missing state.
This paper investigates the design and the hardware implementation of the control level for the three-tank system in modeling error and unavoidable disturbances. The main objective is to design a new controller such that the closed-loop meets the two reference levels using the only measured output available in sampling instants. A filtered continuous-discrete high-gain observer is designed to estimate the missing state. The estimated, treated as the exact state, is then used in the combined flatness-PI feedback control law. The proposed controller is very efficient in simulation and in real-time implementation.

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