基于复合抗扰的溶解氧浓度控制

Compound disturbance rejection control of dissolved oxygen concentration

中文关键词  溶解氧浓度  1号基准仿真模型  扩张状态观测器  滑模控制  复合抗扰控制

英文关键词  dissolved oxygen concentration  benchmark simulation model No.1 (BSM1)  extended state observer  sliding mode control  compound disturbance rejection control

中文摘要

      污水处理中, 出水水质受进水流量、组分以及浓度波动等因素影响. 要保证处理效果, 溶解氧浓度控制应有 较强的鲁棒性. 简单闭环控制的能耗及出水水质波动大. 为此, 本文以污水处理过程1号基准仿真模型模拟污水生 化处理过程, 提出基于扩张状态观测器和滑模控制的复合抗扰控制方法, 以降低对模型信息的依赖, 保证溶解氧浓 度控制效果. 数值仿真结果显示, 复合抗扰控制能够以较小的能耗获得期望的调控效果. 这表明, 复合抗扰控制具有 很好的适应性, 能够满足调控要求, 是一种具有较强实用性的污水处理溶解氧浓度控制方法.

英文摘要

      In a wastewater treatment process, its effluent quality is affected by large perturbations in rate, composition and concentration of the influent flows. Control of dissolved oxygen concentration should be robustness enough so as to guarantee effect of the wastewater treatment. Simple closed-loop control is of high energy consumption and it cannot ensure the quality of effluent water. In order to address it, in this paper, the benchmark simulation model No.1 (BSM1) is utilized to imitate biochemical treatment processes of a wastewater treatment, and a compound disturbance rejection control (CDRC) based on an extended state observer and a sliding mode control is proposed. CDRC is able to achieve desired regulation of the dissolved oxygen concentration without depending on specific model information. Numerical simulation results show that the CDRC can guarantee the desired performance with less energy consumption. It indicates that the CDRC is a practical technique in dissolved oxygen concentration control, which has desired adaptability and can satisfy the regulation requirements.