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张优云, 康荣学, 贾海波
小型微型计算机系统,2003,24(5):884~886,-0001,():
-1年11月30日
介绍了一种基于小波变换的数据压缩/解压系统。该系统对信号首先按不同的频带进行分解,然后分别进行数据压缩和数据重构。通过应用于远程实验的多功能转子试验台的振动信号数据压缩为实例,验证了该系统具有较好的压缩效率、压缩速率和可靠性。
小波变换, 数据压缩, 远程实验
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46浏览
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张优云, 谢友柏
中国机械工程1997,8(5):101 ~104,-0001,():
-1年11月30日
在回顾传统的设计方法及状态监测的传统任务的基础上,展望现代设计技术与状态监测诊断内涵及共相互联系,提出状态监测的研究方向。
现代设计技术信息融合网络化BIT技术
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张优云, Zhang Y Y Xie Y B Qiu D M
Journal of Sound and Vibration, 1992, 152 (3): 549-559.,-0001,():
-1年11月30日
The vibration behaviour of rotors with journal bearings is significantly influenced by the dynamic characteristics of the bearing oil-film. To validate analytical modes of oil-film dynamics, numerous experimental investigations have been undertaken. The authors have previously carried out a project to improve the quality of the estimation of oil-film coefficients. In the companion paper (part I), a system model and an algorithm with simulation results have been presented for a flexible rotor-bearing system under operating conditions. This second paper gives details of an experimental investigation designed to demonstrate the feasibility of the method.
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【期刊论文】Identification of modal parameters in a flexible rotor-bearing system*
张优云, ZHANG Youyun and XIE Youbai
PROGRESS IN NATURAL SCIENCE Vol. 6, No.1, February 1996.,-0001,():
-1年11月30日
The experimental modal analysis (EMA) has been used to estimate modal parameters in many mechanical engineering problems, but it is mostly employed for nonrotating strucrures. A suocessflu application of an improved ITD Method in rotating machinery with oil-film bearings is described.
identification,, modal parameter,, rotor-bearing system,, even distzibution,, response matrices.,
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张优云, Zhang Youyun, Roberts J B
Chinese Journal of Mechanical Engineering (English Edition), 1998, 11 (3): 176~182.,-0001,():
-1年11月30日
The estimate model for a nonlinear system of squeeze-film damper (SFD) is described.The method of state variable filter (SVF) is used to estimate the coefficients of SFD.The factors which are critical to the estimate accuracy are discussed.
Nonlinear coefficient Squeeze-film State variable filter Parameter estimate
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