摘要
常规线性扩张状态观测器在工程领域应用广泛,但由于高频噪声的影响,其带宽受到限制,进而导致估计性能受到严重制约。针对这一问题,提出一种基于级联扩张状态观测器的噪声抑制方法,将常规线性扩张状态观测器进行级联组合,第一级观测器的带宽设置为较低的值,利用观测器的低频段高频滤波特性对噪声进行抑制,在此基础上结合一种相位补偿的跟踪微分器,进一步抑制噪声的同时避免相位过度延迟。以液压伺服系统为控制对象,用常规线性扩张状态观测器进行对比分析,仿真结果表明,所提出的方法在精确控制液压伺服系统的同时,具有良好的噪声抑制能力。
Conventional linear extended-state observers are widely used in engineering,but their bandwidth is limited due to the influence of high-frequency noise,which severely constrains their estimation performance.To address this issue,a noise suppression method based on cascaded extended-state observers is proposed.This method involves the cascading of conventional linear extended-state observers,setting the bandwidth of the first-stage observer at a lower value to exploit the high-frequency filtering characteristics of the low-frequency band of the observer to suppress noise.This is combined with a phase-compensated tracking differentiator to further suppress noise while avoiding excessive phase delay.A hydraulic servo system is used as the control object for comparison analysis with conventional linear extended-state observers.Simulation results demonstrate that the proposed method not only accurately controls the hydraulic servo system but also exhibits excellent noise suppression capabilities.
作者
李燕清
白克强
白月
张丰麟
LI Yanqing;BAI Keqiang;BAI Yue;ZHANG Fenglin(College of Information Engineering,Southwest University of Science and Technology,Mianyang 621010,China;Engineering Research Center of Integration and Application of Digital Learning Technology,Ministry of Education,Beijing 100039,China)
出处
《组合机床与自动化加工技术》
北大核心
2025年第5期125-129,135,共6页
Modular Machine Tool & Automatic Manufacturing Technique
基金
四川省自然科学基金项目(2024NSFSC0448)
数字化学习技术集成与应用教育部工程研究中心项目(1331003)。
关键词
液压伺服系统
扩张状态观测器
自抗扰控制
噪声抑制
hydraulic servo system
extended state observers
active disturbance rejection control
noise suppression
