Design of multiple-loop feedback control systems

I. Horowitz
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引用次数: 8

Abstract

A single-loop design is basic for a two-degree-of-freedom plant, and it is theoretically able to achieve any desired insensitivity to plant variations or rejection of disturbances, if the plant is minimum-phase. In exacting feedback problems where the parameter variations or disturbances are large, the resulting single-loop transmission may require a larger gain and bandwidth than that of the plant. The added feedback compensation networks then have rising frequency characteristics and make the system very sensitive to HF noise in the feedback path. It is shown how a multiple-loop design permits the attainment of the same benefits of feedback, but with considerably less sensitivity to the HF noise. The basic problem is how to divide up the feedback burden most efficiently among the various loop transmission functions. Detailed procedures for this purpose are presented in the paper. The treatment is restricted to cascade-type plants.
多回路反馈控制系统的设计
单回路设计是二自由度装置的基本设计,如果装置是最小相位的,理论上它能够实现对装置变化的任何期望的不敏感或对干扰的抑制。在参数变化或扰动较大的精确反馈问题中,由此产生的单回路传输可能需要比设备更大的增益和带宽。增加的反馈补偿网络具有上升频率特性,使系统对反馈路径中的高频噪声非常敏感。它显示了多回路设计如何允许获得反馈的相同好处,但对高频噪声的灵敏度大大降低。其基本问题是如何最有效地将反馈负担分配到各个环路传输函数中。本文给出了实现这一目的的详细步骤。这种处理仅限于级联型植物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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