Control of water supply in closed growing systems in a greenhouse

被引：0

作者：

Gieling, TH ^{[1
]}

van Straten, G ^{[1
]}

Janssen, HJJ ^{[1
]}

van den Berge, AJP ^{[1
]}

机构：

[1] DLO, IMAG, NL-6700 AA Wageningen, Netherlands

来源：

CONTROL APPLICATIONS & ERGONOMICS IN AGRICULTURE | 1999年

关键词：

constant drain flow control; tipping bucket flow sensor; identification of growing system dynamics;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In the tests presented, direct feedback of drain flow, rather than a predictive uptake model, controls the supply of nutrient solution to plants in a greenhouse. Feedback control of the measured drain water flow keeps it on a constant set value. Water uptake by the plant is considered as a disturbance of the drain flow control loop. A dynamic model is constructed from noise response data of the supply process for three different growing systems. Results are presented, that-show the compensation as a result of feedback control of changes in water uptake:by the plant, due to variations in global radiation. Copyright (C) 1998 IFAC.

引用

页码：169 / 172

页数：4

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