Active Disturbance Rejection Control of a Neutralisation Process

Brown, A; Zhang, J

doi:10.1016/B978-0-444-63456-6.50124-1

Active Disturbance Rejection Control of a Neutralisation Process

Lookup NU author(s): Dr Alison Brown, Dr Jie Zhang ORCiD

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Abstract

This paper presents active disturbance rejection control (ADRC) of pH in a neutralisation process. As pH dynamics is highly nonlinear and not control-affine, direct application of ADRC using pH as the controlled variable is not effective. To overcome this problem, an artificial variable, which has one-to-one mapping with pH and is control affine, is defined as the controlled variable for ADRC. A method for tuning ADRC using step response data is proposed. Application results show that ADRC can give excellent control performance for pH control.