The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method

碩士 === 逢甲大學 === 自動控制工程學系 === 88 === A structural damper is one kind of passive control to dissipate energy. In recent years, it has been successfully applied to the design of high buildings to reduce the swing during the gust. Although it is proved to be an effective energy-dissipater, the research...

Full description

Bibliographic Details
Main Authors: Jen So Huang, 黃政壽
Other Authors: Steven Chingyei Chung
Format: Others
Language:zh-TW
Published: 2000
Online Access:http://ndltd.ncl.edu.tw/handle/37141473112811001022
id ndltd-TW-088FCU00146002
record_format oai_dc
spelling ndltd-TW-088FCU001460022015-10-13T11:53:30Z http://ndltd.ncl.edu.tw/handle/37141473112811001022 The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method 描述函數法應用於非線性阻尼與非線性電感之研究 Jen So Huang 黃政壽 碩士 逢甲大學 自動控制工程學系 88 A structural damper is one kind of passive control to dissipate energy. In recent years, it has been successfully applied to the design of high buildings to reduce the swing during the gust. Although it is proved to be an effective energy-dissipater, the researches are confined to its elastic limit, and the nonlinear characteristics are still unknown. In this thesis, the describing function method is used to study the hysteresis of the structural damper. The relations with the structure''s elongation among elastic coefficient, resonant frequency, period ratio and damping ratio are derived while the deformation is entering the nonlinear range from describing function, the equivalent viscous damper is used to study the vibration of structure. On the other hand, the circuit of passive filter with inductor is simple to design. It doesn''t need any active switch to reduce the input current harmonic of the distortion and increases the power factor. Usually, the inductance of the inductor is assumed to be constant when designing a passive filter. It is all right when the current through the inductor is small, but it is not true when the current is large. The large current will cause the inductor exhibit significant magnetic hysteretic behavior. It will reduce the inductance of inductor and degrade effect of the filter. It is not clear how the inductance changes when the inductor undergoing a large current. In this thesis, we use the describing function and Stemmetz formula to analyze the behavior of magnetic hysteresis. The results are used to derive the relations between inductance and current, and provide as a useful tool when designing a passive filter with inductors undergoing a large current. Besides, we derive the algebraic method to get the damping ratio of the system when structural damper enters the deformation region, and derive the algebraic method to get the steady current across the inductor as an inductor happens magnetic hysteresis owing to large current by describing function method. Steven Chingyei Chung 鍾俊業 2000 學位論文 ; thesis 97 zh-TW
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 碩士 === 逢甲大學 === 自動控制工程學系 === 88 === A structural damper is one kind of passive control to dissipate energy. In recent years, it has been successfully applied to the design of high buildings to reduce the swing during the gust. Although it is proved to be an effective energy-dissipater, the researches are confined to its elastic limit, and the nonlinear characteristics are still unknown. In this thesis, the describing function method is used to study the hysteresis of the structural damper. The relations with the structure''s elongation among elastic coefficient, resonant frequency, period ratio and damping ratio are derived while the deformation is entering the nonlinear range from describing function, the equivalent viscous damper is used to study the vibration of structure. On the other hand, the circuit of passive filter with inductor is simple to design. It doesn''t need any active switch to reduce the input current harmonic of the distortion and increases the power factor. Usually, the inductance of the inductor is assumed to be constant when designing a passive filter. It is all right when the current through the inductor is small, but it is not true when the current is large. The large current will cause the inductor exhibit significant magnetic hysteretic behavior. It will reduce the inductance of inductor and degrade effect of the filter. It is not clear how the inductance changes when the inductor undergoing a large current. In this thesis, we use the describing function and Stemmetz formula to analyze the behavior of magnetic hysteresis. The results are used to derive the relations between inductance and current, and provide as a useful tool when designing a passive filter with inductors undergoing a large current. Besides, we derive the algebraic method to get the damping ratio of the system when structural damper enters the deformation region, and derive the algebraic method to get the steady current across the inductor as an inductor happens magnetic hysteresis owing to large current by describing function method.
author2 Steven Chingyei Chung
author_facet Steven Chingyei Chung
Jen So Huang
黃政壽
author Jen So Huang
黃政壽
spellingShingle Jen So Huang
黃政壽
The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method
author_sort Jen So Huang
title The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method
title_short The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method
title_full The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method
title_fullStr The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method
title_full_unstemmed The Investigations of Nonlinear Dampers and Inductors by Using the Describing Function Method
title_sort investigations of nonlinear dampers and inductors by using the describing function method
publishDate 2000
url http://ndltd.ncl.edu.tw/handle/37141473112811001022
work_keys_str_mv AT jensohuang theinvestigationsofnonlineardampersandinductorsbyusingthedescribingfunctionmethod
AT huángzhèngshòu theinvestigationsofnonlineardampersandinductorsbyusingthedescribingfunctionmethod
AT jensohuang miáoshùhánshùfǎyīngyòngyúfēixiànxìngzǔníyǔfēixiànxìngdiàngǎnzhīyánjiū
AT huángzhèngshòu miáoshùhánshùfǎyīngyòngyúfēixiànxìngzǔníyǔfēixiànxìngdiàngǎnzhīyánjiū
AT jensohuang investigationsofnonlineardampersandinductorsbyusingthedescribingfunctionmethod
AT huángzhèngshòu investigationsofnonlineardampersandinductorsbyusingthedescribingfunctionmethod
_version_ 1716849790630756352