基于改进扰动观测器的时滞过程控制方法  

Control Method Based on Modified Disturbance Observer for Processes with Time-delay

作　　者：郑恩让[1] 阮士涛 陈蓓[1] ZHENG En-rang;RUAN Shi-tao;CHEN Bei(College of Electrical&Information Engineering,Shaanxi University of Science&Technology,Xi’an 710021,China)

机构地区：[1]陕西科技大学电气与信息工程学院,陕西西安710021

出　　处：《控制工程》2020年第5期868-877,共10页Control Engineering of China

摘　　要：针对非最小相位时滞过程,本文提出了一种改进的扰动观测器。通过使用相位超前补偿器,可以有效地补偿时间延迟对系统的不利影响,使系统能够更有效地抑制由模型失配引起的外部干扰和内部干扰。通过设计滤波器可以有效地抑制阶跃和斜坡干扰,并给出了严格的性能分析和鲁棒性分析。所提出的方法同样适用于高阶时滞过程和最小相位时滞过程,并且其结构简单实用。仿真结果表明,该方法在模型不匹配的情况下,在设定值跟踪、抗干扰性和鲁棒性方面均具有优异的性能。A modified disturbance observer is proposed for non-minimum and dead-time processes.The adverse effects of time delay on systems can be compensated effectively by utilizing a phase lead compensator,which makes it more effective for the system to reject external disturbances and internal disturbances caused by model mismatches.The step and ramp disturbances can be rejected efficiently through the design of a filter.Rigorous performance analysis and robustness stability analysis are presented.The proposed method is also suitable for high-order dead-time processes and minimum phase dead-time processes.The proposed structure is simple for application in practice.Simulation results show that the proposed method provides a superior performance of set-point tracking,disturbance rejection and robustness in case of model mismatches.

关 键 词：扰动观测器 相位超前补偿器 非最小相位系统 时滞过程 鲁棒性 模型简化 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]