Reference
A. Sadowska, B. De Schutter, and P.-J. van Overloop, "Delivery-oriented
hierarchical predictive control of an irrigation canal: Event-driven versus
time-driven approaches,"
IEEE Transactions on Control Systems
Technology, vol. 23, no. 5, pp. 1701-1716, 2015.
Abstract
In this paper we present the concept of a hierarchical predictive controller
used for irrigation canals. The motivation behind the work is the need in the
field of irrigation to deliver water to farmers fast, but with minimal
resources involved as the communication links in the field are not dependable
in practice. In response to such a control problem we propose a hierarchical
controller: the lower control layer is formed by decentralized PI controllers
and the higher control layer is constituted by a centralized predictive
controller the purpose of which is to control the inflow to the canal and,
importantly, to coordinate the local controllers by modifying their setpoints.
Having in mind the restrictions on the available communication infrastructure
and the control equipment already present, the scheme is designed to be
event-driven, i.e. activated when there are either delivery requests or
non-delivery-related events of any sort, requiring special care on top of the
control provided by the PI controllers. We also study a time-driven formulation
with an additional post-processing step to avoid excessive negligible setpoint
modifications. We compare the event-driven formulation and the time-driven
formulation theoretically as well as by means of a simulation study for the
West-M irrigation canal in Phoenix, Arizona, illustrating the findings of the
paper. It is shown that the event-driven controller is able to provide a good
balance between the control performance and the required update frequency of
the control settings.
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BibTeX
@article{Sadvan:15-013,
author = {Sadowska, Anna and De Schutter, Bart and van Overloop,
Peter-Jules},
title = {Delivery-Oriented Hierarchical Predictive Control of an
Irrigation Canal: {Event}-Driven Versus Time-Driven Approaches},
journal = {IEEE Transactions on Control Systems Technology},
volume = {23},
number = {5},
pages = {1701--1716},
year = {2015}
}