Preprint Article Version 2 This version is not peer-reviewed

Principles of Instability and Stability in Digital PID Control Strategies and Analysis for a Continuous Alcoholic Fermentation Tank Process Start-up

Version 1 : Received: 18 September 2018 / Approved: 18 September 2018 / Online: 18 September 2018 (08:41:28 CEST)
Version 2 : Received: 27 July 2019 / Approved: 29 July 2019 / Online: 29 July 2019 (03:42:20 CEST)

How to cite: Balbino Barbosa Filho, A.C. Principles of Instability and Stability in Digital PID Control Strategies and Analysis for a Continuous Alcoholic Fermentation Tank Process Start-up. Preprints 2018, 2018090332 (doi: 10.20944/preprints201809.0332.v2). Balbino Barbosa Filho, A.C. Principles of Instability and Stability in Digital PID Control Strategies and Analysis for a Continuous Alcoholic Fermentation Tank Process Start-up. Preprints 2018, 2018090332 (doi: 10.20944/preprints201809.0332.v2).

Abstract

The art work of this present paper is to show properly conditions and aspects to reach stability in the process control, as also to avoid instability, by using digital PID controllers, with the intention of help the industrial community. The discussed control strategy used to reach stability is to manipulate variables that are directly proportional to their controlled variables. To validate and to put the exposed principles into practice, it was done two simulations of a continuous fermentation tank process start-up with the yeast strain S. Cerevisiae NRRL-Y-132, in which the substrate feed stream contains different types of sugar derived from cane bagasse hydrolysate. These tests were carried out through the resolution of conservation laws, more specifically mass and energy balances, in which the fluid temperature and level inside the tank were the controlled variables. The results showed the facility in stabilize the system by following the exposed proceedings.

Subject Areas

digital PID; PID controller; instability; stability; alcoholic fermentation; process start-up

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.