Signal analysis at the phase discriminator output of the phase direction finder circuit with the frequency substitution

2010 ◽  
Author(s):  
Ilya D. Zolotarev ◽  
Vladimir A. Berezovskiy ◽  
Denis D. Privalov
Keyword(s):  
Signal Analysis ◽  
Direction Finder ◽  
Phase Direction ◽  
Phase Discriminator

Method for formation of azimuth mark of phase direction finder

2012 ◽  
Vol 55 (9) ◽  
pp. 1093-1095
Author(s):  
E. S. Bespalov ◽  
A. S. Golovnenkova ◽  
M. A. Poletkov
Keyword(s):  
Direction Finder ◽  
Phase Direction ◽  
Azimuth Mark

scholarly journals Calculating the topocentric coordinates of the radio emission source according to the measurement results of the phase direction finder on board a mobile object

2021 ◽  
Vol 24 (1) ◽  
pp. 7-15
Author(s):  
G. G. Porubov ◽  
◽  
V. P. Denisov ◽  
Keyword(s):  
Radio Emission ◽  
Mathematical Modelling ◽  
Iteration Method ◽  
Elevation Angle ◽  
Mobile Object ◽  
The Earth ◽  
Direction Finder ◽  
Measurement Results ◽  
Phase Direction ◽  
Checking Procedure

The algorithm to calculate the azimuth and the elevation angle on the source of radio emission in the topocentric system of coordinates is suggested according to the measurements done by the phase direction finder located on board a mobile object. The position of an aerial system direction finder to the earth topocentric system of coordinates can be changed. The change in the position of the aerial system influences the accuracy of calculating the bearings. The method to reduce the errors of bearing by iteration method is considered. The checking procedure of the algorithm by mathematical modelling is carried out.

DIFFERENTIAL PHASE DIRECTION FINDING ERRORS FOR EMITTERS WITH PHASE-ANGLE DEPENDENCE

2020 ◽  
Author(s):  
В.Н. ЮДИН ◽  
А.М. ВОЛКОВ
Keyword(s):  
Phase Angle ◽  
Phase Difference ◽  
Direction Finding ◽  
Differential Phase ◽  
Angle Dependence ◽  
Direction Finder ◽  
Phase Direction

Выведены формульные соотношения для расчета ошибок пеленгования парного излучателя с использованием разностно-фазового пеленгатора. Оценено влияние различных параметров парного излучателя на величину ошибки пеленгования этого излучателя. Formula relations for calculating the direction finding errors of a paired transmitter using a phase difference direction finder are derived. The influence of various parameters of a paired radiator on the magnitude of the direction finding error of this radiator is estimated.

scholarly journals Analysis of the resolution of panoramic phase direction finder

2020 ◽  
Vol 23 (1) ◽  
pp. 7-14
Author(s):  
V. P. Denisov ◽  
◽  
D. V. Dubinin ◽  
D. V. Erofeev ◽  
◽  
...  
Keyword(s):  
Direction Finder ◽  
Phase Direction

A Fault Detection Approach Based on Sound Signal Analysis for Equipment Monitoring

2020 ◽  
pp. 129-139
Author(s):  
Weihai Sun ◽  
Lemei Han
Keyword(s):  
Fault Detection ◽  
Signal Analysis ◽  
Energy Analysis ◽  
Detection Method ◽  
Sound Signal ◽  
Practical Significance ◽  
Time Frequency ◽  
Detection Approach ◽  
Machine Fault ◽  
Learning Data

Machine fault detection has great practical significance. Compared with the detection method that requires external sensors, the detection of machine fault by sound signal does not need to destroy its structure. The current popular audio-based fault detection often needs a lot of learning data and complex learning process, and needs the support of known fault database. The fault detection method based on audio proposed in this paper only needs to ensure that the machine works normally in the first second. Through the correlation coefficient calculation, energy analysis, EMD and other methods to carry out time-frequency analysis of the subsequent collected sound signals, we can detect whether the machine has fault.

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