摘要
基于输出多采样率反馈理论与时滞估计原理,提出一种输出多采样率扰动观测器,给出了推导过程及稳定条件。与传统的时滞扰动观测器相比,所提出的扰动观测器利用系统的快速采样输出来估计扰动量,具有滞后量小、结构简单、易于实现等优点。将所提出的扰动观测器应用于导引头伺服控制系统中,仿真结果表明:输出多采样率扰动观测器对弹体耦合干扰力矩、摩擦力矩等外部扰动力矩具有较高的补偿精度,能够有效提高导引头伺服系统的控制精度。
Based on the multi-rate output theory and time delayed algorithm, a kind of multi-rate output disturbance observer is presented, the deducing process and stability conditions of which are also given. Compared with the traditional time delayed estimator, the presented disturbance observer does not need the system states for estimation as it makes use of the fast sampled output of the system. The virtues such as little timelag, simple structure and easy implementation make it more valuable in control systems. Simulation results show that by adapting the presented disturbance observer, the servo system of seekers can reach good perform- ance in the presence of disturbance as friction, coupling and restriction moment.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2008年第12期2458-2461,共4页
Systems Engineering and Electronics
基金
国防预研基金资助课题(10401020202a)
