检索结果-内蒙古大学图书馆

Frequency domain input identification for vibration testing of flexible structures

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING 2013年第G5期227卷 838-856页

作者： Ramkrishna, D. Joshi, Ashok Mujumdar, P. M. Krishna, Y. Def Res & Dev Lab Struct Test Facil Hyderabad 500058 Andhra Pradesh India Indian Inst Technol Dept Aerosp Engn Bombay Maharashtra India

Electronic equipments in flexible slender aerospace structures are subjected to severe vibration environments during the course of flight. In order to qualify the equipment for real life environment, they are subjected to vibrations levels using electrodynamic shaker tables on ground. Control sensors are placed at the critical locations and desired spectra are achieved on the electronic packages at the section level testing. During this testing, the flexible modes of the structure are ignored. In this present study, a methodology of vibration testing is described to achieve the desired spectra at the specified locations on the structure. The article discusses a frequency domain identification of the required input forces to achieve desired acceleration spectra at the specified control locations on the structure. A generalized formulation of input force identification for multiple input multiple output is presented for the vibration testing methodology. Three different configurations like single input single output, multiple input single output, and multiple input multiple output are simulated and verified with the experiments at collocated and non-collocated control sensor-exciter combinations. From the experiments, it has been observed that the desired acceleration spectra at the specified locations are achieved to a good degree of accuracy. Moreover, the efficacy of the proposed method is experimentally verified for the structure with closely spaced modes. Apart from the acceleration control, velocity control approach is also presented in this article.

关键词： Frequency response function matrix power spectral density multiple input multiple output vibration testing

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：