DYNAMICS AND CONTROL OF CROSS-FLOW GRAIN DRYERS 11. A FEEDFORWARD-FEEDBACK CONTROL STRATEGY
作者:
David Plattl,
Ahmet Palazoglu,
TomR. Rumsey,
期刊:
Drying Technology
(Taylor Available online 1992)
卷期:
Volume 10,
issue 2
页码: 333-363
ISSN:0737-3937
年代: 1992
DOI:10.1080/07373939208916441
出版商: Taylor & Francis Group
关键词: cross-flow dryer simulation;feedforward-feedback control;rice drying
数据来源: Taylor
摘要:
A feedforward-feedback control of a cross-flow dryer is developed based on a simple mass balance on the dryer. The feedforward action is based on a pseudo inlet moisture and adjusts the grain flow to correct for inlet moisture variations. The feedback loop accounts for possible process changes and model inaccuracies. Simulations of a rice dryer show good control of the outlet moisture for variations in the inlet moisture with or without simultaneous disturbances in air flowrate. Effect of the'feedforward algorithm on feedback control is also investigated and the suggested combination of feedforward and feedback controls is tested for variations in the inlet moisture when its measurements are biased.
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