On the structure of digital controllers with finite word length consideration

被引：92

作者：

Li, G ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

IEEE TRANSACTIONS ON AUTOMATIC CONTROL | 1998年 / 43卷 / 05期

关键词：

optimal structure; pole sensitivity; stability;

D O I：

10.1109/9.668838

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

It is well known that a stable discrete-time control system may become unstable when the digital controller is actually implemented with a digital control processor (DCP) due to the finite word length (FWL) effects and that the stability behavior of the system depends on the structure of the digital controller. Due to the difficulties in adopting the existing stability robustness measures, a new measure is derived, which is tractable and hence enables us to handle the digital controller structure problem easily. The optimal controller structure problem is formulated by maximizing this measure. An analytical solution is presented. An algorithm is developed for finding sparser structures.

引用

页码：689 / 693

页数：5

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