Feed forward control of mill chute level
- Authors
- Publication Date
- Jan 01, 2023
- Source
- Queensland University of Technology ePrints Archive
- Keywords
- License
- Unknown
- External links
Abstract
<p>Mossman #5 mill suffers from highly variable feeding rate. The bagasse from #2 mill is transported by three intermediate carriers and two mill overflow chutes over the decommissioned #3 and #4 mills before getting to #5 mill. Although the #5 mill chute is relatively large, the chute level varies from 0% to 100% quite quickly, causing large variations in torque. The challenge of smoothing the bagasse flow into the mill is substantial and so efforts have been taken to improve mill control through a feed forward action. It has been observed that the preceding intermediate carrier motor current provides advance notice of chute level changes. When the motor current increases, the chute level subsequently rises, and vice versa. This characteristic has now been implemented into the Mossman #5 mill control system so that the mill speed starts to rise after the intermediate carrier motor current increases and before the chute level rises. This feed forward action provides a much more consistent chute level and more consistent mill torque.</p>
