Energy analysis method of the laser tracing measurement optical system

2019 ◽  
Author(s):  
Chen Hongfang ◽  
Liang Tang ◽  
Huixu Song ◽  
Bo Yu ◽  
Zhaoyao Shi
Keyword(s):  
Optical System ◽  
Energy Analysis ◽  
Analysis Method

scholarly journals Energy Analysis Method Based on Wavelet Transform for Sensor Fault Diagnosis

2011 ◽  
Vol 2-3 ◽  
pp. 117-122 ◽  
Author(s):  
Peng Peng Qian ◽  
Jin Guo Liu ◽  
Wei Zhang ◽  
Ying Zi Wei
Keyword(s):  
Wavelet Transform ◽  
Fault Diagnosis ◽  
Wavelet Analysis ◽  
Energy Analysis ◽  
Sensor Faults ◽  
Analysis Method ◽  
Sensor Fault ◽  
Fault Type ◽  
Ideal Tool ◽  
Non Stationary Signal

Wavelet analysis with its unique features is very suitable for analyzing non-stationary signal, and it can also be used as an ideal tool for signal processing in fault diagnosis. The characteristics of the faults and the necessary information on the diagnosis can be constructed and extracted respectively by wavelet analysis. Though wavelet analysis is specialized in characteristics extraction, it can not determine the fault type. So this paper has proposed an energy analysis method based on wavelet transform. Experiment results show the method is very effective for sensor fault diagnosis, because it can not only detect the sensor faults, but also determine the fault type.

Road Noise Modelling Using Statistical Energy Analysis Method

1995 ◽  
Author(s):  
Bangyi Dong ◽  
Martin Green ◽  
Mark Voutyras ◽  
Paul Bremner ◽  
Peter Kasper
Keyword(s):  
Energy Analysis ◽  
Statistical Energy Analysis ◽  
Analysis Method ◽  
Road Noise

Wavefront Reconstruction Error Analysis Method for Diffraction Optical System

2019 ◽  
Vol 39 (11) ◽  
pp. 1105002
Author(s):  
乔凯 Qiao Kai ◽  
智喜洋 Zhi Xiyang ◽  
杨冬 Yang Dong ◽  
于頔 Yu Di ◽  
王达伟 Wang Dawei
Keyword(s):  
Error Analysis ◽  
Optical System ◽  
Reconstruction Error ◽  
Analysis Method ◽  
Wavefront Reconstruction

Wake and Loss Analysis for a Double Bladed Swept Propeller

2016 ◽  
Author(s):  
Alexandre Capitao Patrao ◽  
Richard Avellán ◽  
Anders Lundbladh ◽  
Tomas Grönstedt
Keyword(s):  
High Speed ◽  
Energy Analysis ◽  
Complex Geometry ◽  
Analysis Method ◽  
Aircraft Wings ◽  
Loss Analysis ◽  
Propeller Wake ◽  
Induced Drag ◽  
Propeller Blades ◽  
Tip Velocity

Inspired by Prandtl’s theory on aircraft wings with minimum induced drag, the authors introduced a double-bladed propeller, the Boxprop, intended for high-speed flight. The basic idea is to join the propeller blades pair-wise at the tip to improve aerodynamics and mechanical properties compared to the conventional propeller. The rather complex geometry of the double blades gives rise to new questions, particularly regarding the aerodynamics. This paper presents a propeller wake energy analysis method which gives a better understanding of the potential performance benefits of the Boxprop and a means to improve its design. CFD analysis of a five bladed Boxprop demonstrated its ability to generate typical levels of cruise thrust at a flight speed of Mach 0.75. The present work shows that the near tip velocity variations in the wake are weaker for this propeller than a conventional one, which is an indication that a counter rotating propeller designed with a Boxprop employed at the front may exhibit lower interaction noise.

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