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PH—Postharvest Technology: Automatic Control of Crossflow Grain Dryers, Part 1: Development of a Process Model

✍ Scribed by Qiang Liu; F.W. Bakker-Arkema

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
256 KB
Volume
80
Category
Article
ISSN
0021-8634

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✦ Synopsis

The grain drying process is di$cult to control because of its non-linearity and long delay. In this series of three papers, a model-predictive controller specially designed for the grain drying process is presented. Part 1 describes the development of a distributed-parameter process model based on the fundamental laws of simultaneous heat and mass transfer. The model is simpler than the general-purpose grain drying model; but it is more comprehensive and better in representing the non-linearity of the process than previously developed lumped parameter process models, and therefore is the preferred choice as the process model in a dryer controller. The control algorithm and "eld testing of the controller are covered in Parts 2 and 3, respectively.

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PH—Postharvest Technology: Automatic Con
PH—Postharvest Technology: Automatic Control of Crossflow Grain Dryers, Part 2: Design of a Model-Predictive Controller
✍ Qiang Liu; F.W. Bakker-Arkema 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 331 KB

Continuous-#ow grain drying is a non-linear process with a long delay; it is often subjected to large disturbances, and therefore is di$cult to control. In this paper, a new model-predictive control system for cross#ow dryers is presented. The controller uses a recently developed distributed paramet

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PH—Postharvest Technology: Automatic Control of Crossflow Grain Dryers, Part 3: Field Testing of a Model-Predictive Controller
✍ Qiang Liu; F.W. Bakker-Arkema 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 279 KB

In Part 3 of the paper on automatic control of cross#ow grain dryers, the "eld testing of newly developed model-predictive controller is described. The system showed excellence in accuracy, stability and robustness. The moisture content of maize was controlled to be within $0)7% w.b. of the moisture