Annular Integrity Analysis A Through-Tubing Measurement And Analysis Method To Identify, Diagnose And Quantify Fluid Movement In Multiple Annuli Caused By Loss Of Annular Integrity

2018 ◽  
Author(s):  
Alan Muhadjir
Keyword(s):  
Analysis Method ◽  
Fluid Movement ◽  
Measurement And Analysis ◽  
Integrity Analysis

Loudspeaker Nonlinear Distortion Signal Instantaneous Frequency Measurement and Analysis

2012 ◽  
Vol 203 ◽  
pp. 83-87
Author(s):  
Yu Tian Wang ◽  
Hui Wang ◽  
Qin Zhang
Keyword(s):  
Instantaneous Frequency ◽  
Nonlinear Distortion ◽  
Frequency Measurement ◽  
Analysis Method ◽  
Hilbert Huang Transform ◽  
Strongly Nonlinear ◽  
Measurement And Analysis ◽  
Strongly Nonlinear System ◽  
Nonlinear Signal ◽  
Signal Analysis Method

Loudspeaker is a strongly nonlinear system which is associated with several situations such as electronic, magnetic, mechanical and acoustic. Recently, most of the methods used to measure and analysis loudspeaker are based on the FFT. Unfortunately, traditional Fourier transform based signal analysis method usually causes meaningless results when it is used to analysis non-stationary and nonlinear signal. In this paper, we use Hilbert-Huang transform (HHT) to review the instantaneous frequency of loudspeaker output. Experiments demonstrate that the distortion of loudspeaker can be recognized as intrawave frequency modulation caused by wave profile deformation. Then a novel nonlinear distortion measurement method is proposed which can reveal more accurate and physical meaningful characteristic of loudspeaker.

Data Measurement and Analysis Method for YLJ Series Tire Uniformity Testing Machine

2012 ◽  
Vol 501 ◽  
pp. 82-87
Author(s):  
Bai Lin Hang ◽  
Zhong Yu Lu ◽  
Zhen Ya Duan ◽  
Fa Wei Liu
Keyword(s):  
International Development ◽  
Testing Machine ◽  
Good Property ◽  
Analysis Method ◽  
Data Measurement ◽  
Measurement And Analysis ◽  
History Of ◽  
Force Data ◽  
Repeated Test ◽  
Concise Description

This paper provides a concise description of the international development of the low-speed tire uniformity testing machine (TUTM). And particular emphasis is given to the developing history of YLJ series TUTM, researched and developed independently by MESNAC Co., Ltd. It is well known that data measurement and analysis are fundamental to a TUTM. However, very few studies of testing mechanism of tire uniformity have been reported. The primary subject of this paper is to describe operational principle, measurement of force, data measurement and analysis methods of YLJ series TUTM. It also shows the good property of YLJ series TUTM combined with the experimental data of a 215/70R15 97H tire repeated test 10 times.

Development of a Two-Dimensional Force Model and Data Analysis for the Tire Uniformity Testing Machine

2011 ◽  
Vol 221 ◽  
pp. 343-349 ◽  
Author(s):  
Bai Lin Hang ◽  
Zhen Ya Duan
Keyword(s):  
Data Analysis ◽  
Testing Machine ◽  
Lateral Force ◽  
Testing System ◽  
Force Model ◽  
Two Dimensional ◽  
Analysis Method ◽  
Data Analysis Method ◽  
Uniformity Test ◽  
Measurement And Analysis

Force model of tire uniformity testing system and data analysis method are fundamental to a tire uniformity testing machine. Based on theoretical analysis, this paper proposes a two-dimensional force model to calculate tire’s radial and lateral force, confirm the mechanical structures of the existing tire uniformity testing machine’s testing system and verify the validity of its testing method by the model. According to this two-dimensional force model and FFT data analysis method, the YLJ series tire uniformity testing machine is developed. It is mainly applied for fully auto online uniformity test and size deviation. The authors also explained the operational principle, data measurement and analysis procedure of the YLJ series tire uniformity testing machine.

Study on a Harmonic Measurement and Analysis Method for Power Supply System

2017 ◽  
Vol 18 (3) ◽  
Author(s):  
Tiecheng Wu ◽  
Dao Jiang ◽  
Yazi Wang ◽  
Aiju Lei
Keyword(s):  
Power System ◽  
Power Supply ◽  
High Speed ◽  
Power Supply System ◽  
Supply System ◽  
Analysis Method ◽  
High Speed Railway ◽  
S Transform ◽  
Measurement And Analysis ◽  
Harmonic Measurement

Abstract In the power supply system of high speed railway, the generated harmonics can not only influence the electric energy quality of power system, occur the voltage fluctuation and flicker, and affect the service life of traction equipment and traction transformer of electric power substation, but also cause the secondary protection misoperation of automatic control system, and affect the normal operation of the train. With the increase of overhead contact line transmission, the generated harmonics increased the communication interference. Therefore, on the basis of analyzing the generation and spectrum of harmonics in power system, an improved S transform method is introduced in order to propose a harmonic measurement and analysis method based on improved S transform for power supply system of high speed railway in this paper. The proposed method can effectively realize the harmonic measurement and analysis of power supply system. In order to testify the effectiveness of the proposed harmonic measurement and analysis method, Yingkou substation of Harbin-Dalian high speed railway is selected in here. The actual analysis calculation and experiment results show that the proposed method can effectively measure and analyze the harmonic in the power supply system of high speed railway. It provides a theoretical basis for solving the practical engineering problem of power supply.

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