A modified active disturbance rejection control for a wastewater treatment process

doi:10.1016/j.cjche.2020.06.032

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (10): 2607-2619.DOI: 10.1016/j.cjche.2020.06.032

• Process Systems Engineering and Process Safety • 上一篇下一篇

A modified active disturbance rejection control for a wastewater treatment process

Wei Wei, Pengfei Xia, Zaiwen Liu, Min Zuo

Beijing Technology and Business University, Beijing 100048, China National Engineering Laboratory for Agri-product Quality Traceability, Beijing Technology and Business University, Beijing 100048, China Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing 100048, China

收稿日期:2020-03-13 修回日期:2020-05-21 出版日期:2020-10-28 发布日期:2020-12-03
通讯作者: Min Zuo
基金资助:
This work is supported by the Key program of Beijing Municipal Education Commission (KZ201810011012), National Natural Science Foundation of China (61873005), and Support Project of High-level Teachers in Beijing Municipal Universities in the Period of 13th Fiveyear Plan (CIT&TCD201704044).

A modified active disturbance rejection control for a wastewater treatment process

Wei Wei, Pengfei Xia, Zaiwen Liu, Min Zuo

Beijing Technology and Business University, Beijing 100048, China National Engineering Laboratory for Agri-product Quality Traceability, Beijing Technology and Business University, Beijing 100048, China Beijing Key Laboratory of Big Data Technology for Food Safety, Beijing 100048, China

Received:2020-03-13 Revised:2020-05-21 Online:2020-10-28 Published:2020-12-03
Contact: Min Zuo
Supported by:
This work is supported by the Key program of Beijing Municipal Education Commission (KZ201810011012), National Natural Science Foundation of China (61873005), and Support Project of High-level Teachers in Beijing Municipal Universities in the Period of 13th Fiveyear Plan (CIT&TCD201704044).

摘要/Abstract

摘要： Waste water treatment process (WWTP) control has been attracting more and more attention. However, various undesired factors, such as disturbance, uncertainties, and strong nonlinear couplings, propose big challenges to the control of a WWTP. In order to improve the control performance of the closed-loop system and guarantee the discharge requirements of the effluent quality, rather than take the model dependent control approaches, an active disturbance rejection control (ADRC) is utilized. Based on the control signal and system output, a phase optimized ADRC (POADRC) is designed to control the dissolved oxygen and nitrate concentration in a WWTP. The phase advantage of the phase optimized extended state observer (POESO), convergence of the POESO, and stability of the closed-loop system are analyzed from the theoretical point of view. Finally, a commonly accepted benchmark simulation model no. 1. (BSM1) is utilized to test the POESO and POADRC. Linear active disturbance rejection control (LADRC) and the suggested proportion-integration (PI) control are taken to make a comparative research. Both system responses and performance index values confirm the advantage of the POADRC over the LADRC and the suggested PI control. Numerical results show that, as a result of the leading phase of the total disturbance estimation, the POESO based POADRC is an effective and promising way to control the dissolved oxygen and nitrate concentration so as to ensure the effluent quality of a WWTP.

关键词: Wastewater treatment process, BSM1, Dissolved oxygen, Nitrate concentration, Active disturbance rejection control, Phase optimization extended state observer

Abstract: Waste water treatment process (WWTP) control has been attracting more and more attention. However, various undesired factors, such as disturbance, uncertainties, and strong nonlinear couplings, propose big challenges to the control of a WWTP. In order to improve the control performance of the closed-loop system and guarantee the discharge requirements of the effluent quality, rather than take the model dependent control approaches, an active disturbance rejection control (ADRC) is utilized. Based on the control signal and system output, a phase optimized ADRC (POADRC) is designed to control the dissolved oxygen and nitrate concentration in a WWTP. The phase advantage of the phase optimized extended state observer (POESO), convergence of the POESO, and stability of the closed-loop system are analyzed from the theoretical point of view. Finally, a commonly accepted benchmark simulation model no. 1. (BSM1) is utilized to test the POESO and POADRC. Linear active disturbance rejection control (LADRC) and the suggested proportion-integration (PI) control are taken to make a comparative research. Both system responses and performance index values confirm the advantage of the POADRC over the LADRC and the suggested PI control. Numerical results show that, as a result of the leading phase of the total disturbance estimation, the POESO based POADRC is an effective and promising way to control the dissolved oxygen and nitrate concentration so as to ensure the effluent quality of a WWTP.

Key words: Wastewater treatment process, BSM1, Dissolved oxygen, Nitrate concentration, Active disturbance rejection control, Phase optimization extended state observer

Wei Wei, Pengfei Xia, Zaiwen Liu, Min Zuo. A modified active disturbance rejection control for a wastewater treatment process[J]. 中国化学工程学报, 2020, 28(10): 2607-2619.

Wei Wei, Pengfei Xia, Zaiwen Liu, Min Zuo. A modified active disturbance rejection control for a wastewater treatment process[J]. Chinese Journal of Chemical Engineering, 2020, 28(10): 2607-2619.

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A modified active disturbance rejection control for a wastewater treatment process

A modified active disturbance rejection control for a wastewater treatment process

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