Robust multi-variable control of continuous yeast drying. (June 2022)

• Record Type: Journal Article
• Authors: Seidel, Carsten; Dürr, Robert; Bück, Andreas
• Is Part Of: Journal of process control. Volume 114(2022)
• Page Start: 42
• Page End: 53
• Publication Date: 2022-06
• Subjects: 0000 -- 1111; Convective drying -- Particles -- Yeast -- Process control -- Multi-variable control -- Robust control -- H∞ control; Process control -- Periodicals; Fabrication -- Contrôle -- Périodiques; Process control; Periodicals; Electronic journals; 660.281
• DOI: 10.1016/j.jprocont.2022.04.004
• Languages: English
• ISSNs: 0959-1524

Abstract

Abstract: This work considers robust moisture content and activity control in a continuous convective drying for particulate bio-materials. The major process uncertainty is in the kinetics of the second (falling-rate) drying period. Robust feedback controllers in the multi-variable and de-central case are designed to guarantee desired product specifications. The advantages of the robust controllers are discussed in comparison with a conventional PI controller. The case study presented is the drying of baker's yeast in a fluidized bed dryer. The results show constant performances concerning the uncertainty of the drying kinetics and disturbance rejection at different operating points. Highlights: Robust multivariable controller design for convective drying. Constant controller performance concerning various process uncertainties and operating points. Baker's yeast in fluidized bed dryer as case study.