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Related Experiment Video

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Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment

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Fixed-Time Fault-Tolerant Control for Wastewater Treatment Processes With Asymmetric State Constraints.

Hong-Gui Han, Han-Qian Hou, Hao-Yuan Sun

IEEE Transactions on Cybernetics

|April 21, 2026

Summary

This summary is machine-generated.

This study introduces an adaptive fixed-time fault-tolerant control strategy to manage dissolved oxygen concentration in wastewater treatment, addressing aeration equipment faults for improved control.

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Area of Science:

Environmental Engineering
Control Systems Engineering
Chemical Engineering

Background:

Aeration equipment faults in wastewater treatment processes (WWTPs) disrupt dissolved oxygen concentration (DOC) control.
State-constrained DOC tracking is crucial for efficient wastewater treatment but is hindered by actuator faults.

Purpose of the Study:

To develop an adaptive fixed-time fault-tolerant control (AFTFTC) strategy to address actuator faults in WWTPs.
To ensure stable and precise control of state-constrained dissolved oxygen concentration (DOC) despite system faults.

Main Methods:

Construction of an asymmetric integral barrier Lyapunov function (AIBLF) to handle asymmetric state constraints.
Proposal of a fixed-time fault-tolerant control (FTC) method for fault compensation and fast DOC setpoint tracking.
Utilization of an adaptive compensation term to estimate unknown actuator bias fault boundaries.

Main Results:

The AFTFTC strategy effectively compensates for actuator faults impacting DOC regulation.
The controller ensures fast tracking of the DOC setpoint within fixed-time stability bounds.
Validation on the benchmark simulation model 1 (BSM1) confirms the strategy's effectiveness.

Conclusions:

The developed AFTFTC strategy successfully manages dissolved oxygen concentration under actuator faults in WWTPs.
The approach guarantees fixed-time stability for the closed-loop system, enhancing process reliability.
This method provides a robust solution for maintaining optimal DOC levels in wastewater treatment.