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Time-Domain Experimental Identification Technique of Rotating Short Systems

旋转短系统时域实验辨识技术

基本信息

批准号：
10650238
负责人：
YASUDA Kimihiko
金额：
$ 2.3万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

As rotating machines becomes higher and lighter, it becomes more difficult to realize their stable and quiet operation. To model machines in this situation, experimental identification techniques become more important. In this research we attempt to develop a new experimental identification technique suitable for rotating machines. To identify rotating machines, we encounter some difficulties which are free in the usual non-rotating machines. First the rotating machines are usually difficult to be excited during their high-speed operation. Second they contain such parameters as unbalances and initial imperfections, which are not important in the usual non-rotating machines. Third they often become nonlinear systems. To overcome these difficulties, we developed, in a former research, frequency-domain techniques. These techniques, however, require long time to conduct identification. To improve this defect, we attempt to develop a time-domain technique. First, as a fundamental study, we consider a rotating shaft with a disc, and propose an identification technique using the least square method and the Lagrane multiplier method. We showed its applicability by numerical simulation and experiment. Then we generalize the technique so that it is applicable to nonlinear systems. Finally, we developed a technique for continuous rotating machines. We also showed its applicability by numerical simulation and experiment.

随着旋转机械越来越高、越来越轻，实现其稳定、安静运行变得越来越困难。为了在这种情况下对机器进行建模，实验识别技术变得更加重要。在这项研究中，我们试图开发一种新的实验识别技术适用于旋转机械。为了识别旋转机器，我们遇到了一些困难，这些困难在通常的非旋转机器中是免费的。首先，旋转机械在高速运行时通常难以被激励。其次，它们包含不平衡和初始缺陷等参数，这些参数在通常的非旋转机器中并不重要。第三，它们往往成为非线性系统。为了克服这些困难，我们在以前的研究中开发了频域技术。然而，这些技术需要很长时间来进行识别。为了改善这一缺陷，我们试图开发一种时域技术。首先，作为一个基础性的研究，我们考虑了一个旋转轴与盘，并提出了一种识别技术，使用最小二乘法和拉格朗日乘子法。通过数值模拟和实验验证了该方法的可行性。然后，我们推广的技术，使其适用于非线性系统。最后，我们开发了一种用于连续旋转机器的技术。通过数值模拟和实验验证了该方法的适用性。