检索结果-内蒙古大学图书馆

9th World Multi-Conference on Systemics, Cybernetics and Informatics

作者： Bitjoka, Laurent Univ Ngaoundere Dept Elect Engn Energet & Automat Natl Sch Agroind Sci ENSAI Ngaoundere Cameroon

ISBN: (纸本)9789806560598

In this paper, a method of determining the degree of stability of a feedback system, based on the frequency response of the system's closed-loop transfer function (CLTF) is proposed. The degree of stability is quantified in terms of a phase margin (PM) and a gain margin (GM), which are respectively related to the phase and magnitude of this CLTF. It is shown theoretically that PM = 180 degrees-2 phi(R/C)(omega(2 phi)), i.e. the difference between 180 degrees and twice the phase of the CLTF at the intersection between its modulus and a sinusoidal function of its phase obtained when the open-loop transfer function (OLTF) crosses the magnitude 1. An experimental method of determining PM is described. A theoretical method of determining GM are also presented. For the critical open-loop phase 180 degrees, it is shown that the CLTF is also 180 degrees in phase. The proposed method is validated through simulations on second-order system.

关键词： feedback system closed-loop frequency response gain margin phase margin stability

来源：评论

学校读者我要写书评

暂无评论

Active feedback control using adaptive filtering

引用

JOURNAL OF VIBRATION AND CONTROL 2004年第1期10卷 25-38页

作者： Wang, FL Mechefske, CK Queens Univ Dept Engn Mech Kingston ON K7L 3N6 Canada

In this paper we apply a filtered-X algorithm to an active feedback control structure and derive the transfer function of a closed-loop control system. Simulation studies are then carried out on the closed-loop property while varying the parameters (input frequency, delays in plant, amplitude and phase of modeling filter). Several properties of adaptive feedback control are revealed. Experimental studies on feedback active noise control of noise in a finite duct and a small enclosure are described, and outstanding active noise control effects are achieved. Experimental results of closed-loop frequency response are also provided.

关键词： active noise control feedback control algorithm closed-loop frequency response adaptive filtering algorithm

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：