【摘要】 溶解氧浓度是影响污水处理的关键因素,有效控制溶解氧浓度,可减少曝气能耗、提高出水水质。然而,溶解氧浓度受进水流量、组分、浓度、天气等多源干扰的影响。为保证水水质,提出一种改进型有限时间扩张状态观测器,综合有限时间控制与改进型有限时间扩张状态观测器,设计一种改进型有限时间自抗扰控制,以克服污水处理中的扰动和不确定性。在污水处理1号基准仿真模型上,改进型有限时间自抗扰控制获得了期望的溶解氧调控效果。仿真结果表明,改进型有限时间自抗扰控制能有效估计总扰动、提高污水处理效果。更多还原

【Abstract】 Dissolved oxygen is a key factor in wastewater treatment processes. An effective regulation on the dissolved oxygen is helpful to reduce the energy consumption of aeration and improve the effluent quality. However, the dissolved oxygen is influenced by various issues, such as weather, rates, constituents, and concentrations of the inflow. To guarantee the effluent quality, a modified finite-time extended state observer is proposed. Combining a finite-time control and the modified finite-time extended state observer, a modified finite-time active disturbance rejection control wais designed to overcome the disturbances and uncertainties in a wastewater treatment process. Based on the benchmark simulation model No.1, the modified finite-time active disturbance rejection control achieved satisfied regulation on dissolved oxygen. Simulation results show that the modified finite-time active disturbance rejection control can estimate the total disturbance and enhance the wastewater treatment effectively.更多还原