A Design Method of Disturbance Observer to Cope with Frequency Variation
A Design Method of Disturbance Observer to Cope with Frequency Variation
复制标题
一种应对频率变化的扰动观测器设计方法
DOI：
10.1541/ieejias.118.127
复制
发表时间：
1998
影响因子：
--
通讯作者：
T. Narikiyo
中科院分区：
文献类型：
--
作者：
K. Fuwa;T. Narikiyo
一个众所周知的控制系统，可以减少不利影响的周期性干扰与单一频率的干扰观测器。然而，在工业系统的许多情况下，干扰频率对于某些频率范围是变化的。针对传统的干扰观测器难以有效抑制干扰的不利影响，提出了一种新的干扰观测器的设计方法。这种设计方法的主要思想是将干扰观测器综合为增益调度控制器。所提出的干扰观测器被构造成具有上级稳态特性的低阶低增益控制器。通过与传统的干扰观测器和H∞控制器的比较，数值仿真结果表明了该干扰观测器的有效性.
A well known control system which can reduce the adverse effect of a periodic disturbance with single frequency is the disturbance obsever. However, in many cases of industrial systems disturbance frequency is varied for some frequency range. Therefore, it may be difficult to reduce the adverse effect of the disturbance by the use of the traditional disturbance observer.In this paper, a design method of new disturbance observer which can cope with the frequency variation is proposed. The main idea of this design method is to synthesize the disturbance observer as a gain-scheduled controller. The proposed disturbance observer is constructed as low degree and low gain controller with superior steadystate characteristic. As compared with the traditional disturbance observer and the H∞ controller, the usefulness of the proposed disturbance observer was shown by numerical simulations.