Theoretical Foundations for High Performance Order Tracking with the Vold-Kalman Tracking Filter

1997 ◽  
Author(s):  
Håvard Vold ◽  
Michael Mains ◽  
Jason Blough

Author(s):  
Min-Chun Pan ◽  
Yu-Fong Lin

This paper presents advanced order tracking techniques using the Kalman tracking filter with angular information to extract both close and cross order components from measured dynamic signals. Separated order components can be ranked for the purpose of trouble shooting and design modification. In the study, close-order components resulting from shaft unbalancing and gear meshing of a transmission element test bench can be extracted precisely. In addition, for the pass-by noise measurement of CVT-driving electrical scooters, spectral components can be ranked appropriately for a further noise reduction task.



2013 ◽  
Vol 834-836 ◽  
pp. 1140-1144 ◽  
Author(s):  
Yong Tai Chen ◽  
Chang Jing Sun ◽  
Bin Zang ◽  
Long Cheng ◽  
Jing Tang ◽  
...  

Phase noise and spurious signals of local oscillator will affect the performance of short-wave receiver. The structure of receiver's front-end part based on DDS is introduced to realize a high-performance local oscillator of short-wave receiver. Then measures were taken to improve the LO's performance, including using external directly frequency multiplier as DDS' clock to improve the purity of frequency spectrum, tracking filter to degrade harmonics and gain control circuit to remain constant amplitude in the desired frequency range. At last, test results show that the above-mentioned measures improve the receiver's performance.





1999 ◽  
Vol 105 (2) ◽  
pp. 1026-1026 ◽  
Author(s):  
Svend Gade ◽  
Henrik Herlufsen ◽  
Hans Konstantin‐Hansen


Author(s):  
Shuren Qin ◽  
Yu Guo

A new method for run-up or coast down vibration signal order tracking filtering of rotating machinery based on instantaneous frequency estimation and zero-phase distortion digital filtering is proposed in this paper. By contrast with traditional methods of order tracking filtering, the features of tacholess, no hardware-based tracking filter required and no frequency shift to original sampling data, etc, make it more attractive. The theorems and algorithms of the method are detailed discussed in this paper. The filtering of overlapped data blocks is used to restrain the edge effect, which caused by digital filtering, is also introduced. An actual test example of a motor’s run-up and coast down vibration is introduced to demonstrate the validity of the method.



2020 ◽  
Author(s):  
Nikolay Kargin ◽  
Yuliya Laamarti

The textbook examines the basic concepts, theoretical and methodological approaches to the assessment of the status, functioning and human development and its individual organs and subsystems in the structure of life, the basic principles of course of organismal and behavioral processes that support human adaptation to the external environment and the effectiveness of the behavior in terms of specific activities. Discusses the meaning of "health" in its broadest sense: physical, social, spiritual — and the ways, methods and tests examination of functional state of human organism and various systems and organs. Given the characteristics of statistically valid norms of health and its individual components, the effect of various tools, techniques, methods and technologies of developing and improving orientation on the formation mechanism of adaptation to conditions of activity and environment. Offers tested in practice and selected according to the degree of effectiveness of the tools, techniques and technologies of correction of the functional systems of the organism, providing high performance, health and performance of behavioral reactions and the subject in General. Meets the requirements of Federal state educational standards of higher education of the last generation. Intended for graduate students and faculty whose interests are related to the problems of human adaptation to the environment and professional activity.



2005 ◽  
Vol 295-296 ◽  
pp. 747-752
Author(s):  
S.R. Qin ◽  
Y. Guo

A new method for order tracking filtering of rotating machinery based on instantaneous frequency estimation and zero-phase distortion digital filtering is proposed. Compared with the traditional methods for order tracking filtering, the new method has a number of attractive features such as tacholess, no hardware-based tracking filter and no frequency shift to the original sampling data. The theorems and algorithms of the method are discussed. Filtering of overlapped data blocks, used to restrain the edge effect, which is caused by digital filtering, is introduced. An actual test example of run-up and coast down vibration of a motor is presented to demonstrate the validity of the method.



2013 ◽  
Vol 11 (10) ◽  
pp. 435 ◽  
Author(s):  
Theodore Mitchell ◽  
Howard Olsen

This paper demonstrates that the marketing return on investment (MROI) can be inversely related to profits in healthy, high performance firms. In light of this, the authors contend that MROI is a poor metric for evaluating profitable performance, because lower MROI is not always a sign of poor performance and higher MROI is not always a sign of higher performance. However, MROI can be converted into an elasticity of efficiency and used as a diagnostic tool to help marketing managers choose more profitable levels of promotion. MROI in the role of a diagnostic tool has stronger theoretical foundations than in its role as an evaluation metric. The paper presents the elasticity of MROI to changes in marketing expense as a practical tool for marketing managers to improve the profitability of marketing.



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