DYNAMICS AND CONTROL OF CROSS-FLOW GRAIN DRYERS 11. A FEEDFORWARD-FEEDBACK CONTROL STRATEGY
- 1 March 1992
- journal article
- research article
- Published by Taylor & Francis in Drying Technology
- Vol. 10 (2) , 333-363
- https://doi.org/10.1080/07373939208916441
Abstract
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.Keywords
This publication has 8 references indexed in Scilit:
- A feedforward/feedback adaptive controller for commercial cross-flow grain driersJournal of Agricultural Engineering Research, 1990
- Control of a mixed-flow drier part 1: Design of the control algorithmJournal of Agricultural Engineering Research, 1988
- Modelling and adaptive control of continuous grain driersJournal of Agricultural Engineering Research, 1988
- AUTOMATIC CONTROL OF COMMERCIAL CROSSFLOW GRAIN DRYERSDrying Technology, 1987
- An unsteady-state simulation to study the control of concurrent and counter-flow grain driersJournal of Agricultural Engineering Research, 1986
- Model based control strategies for commercial grain drying systemsThe Canadian Journal of Chemical Engineering, 1984
- Computer Controls for Grain DriersTransactions of the ASAE, 1969
- Simulating a Moisture-Control System for a Continuous-Flow DrierTransactions of the ASAE, 1966