A Whole-period Sample Method for Aeroengine Trim Dynamic Balance

摘要：

Rotate speed fluctuation influences whole-period sample for vibration signals distinctly via digital phase-locked cycle module, inducing its hard to calculate vibration amplitude and phase in master frequency exactly. In order to solve the problem, to sample phase-detecting signals and vibration signals synchronously and cut vibration signals according to raise edges of two phase-detecting signals, then whole-period sample is realized. Two conditions s f ≥ min / N T and N r w / 2π > are discussed because they are essential to sample raise edge of phase-detecting signal in each period in time. At last, Subsection quadratic interpolation is used to resample vibration signals according the cut vibration signals so that FFT algorithm can be used and sample number is reduced to decrease calculation loads.

关键词： whole-period sample FFT phase-detecting signal interpolation

作者: YANG Xun LEI Yong

作者单位: Department of Power and Energy, Northwest Polytechnical University Xian, China 710072

会议类型: 国际会议

会议名称: 第七届国际测试技术研讨会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-05（万方平台首次上网日期，不代表论文的发表时间）