scholarly journals Special Aspects of Fixing Interfering Source Located in Close Proximity to Radio-Electronic Equipment with Multi-Channel Receiver and Estimate of Accuracy

2018 ◽  
pp. 63-70
Author(s):  
S. G. Borovikov ◽  
A. A. Ivensky
Keyword(s):  
Rapid Detection ◽  
Noise Source ◽  
Source Location ◽  
Electronic Equipment ◽  
Detection Time ◽  
Fundamental Properties ◽  
Radio Electronic ◽  
Close Proximity ◽  
Uncertainty Zone ◽  
Antenna Field

One of the fundamental properties of modern radio electronic equipment (REE) is jammer-induced performance in particular when located near REE, when they significantly affect the parameters of electromagnetic field generated and/or received by REE. One of the ways of antijamming is its rapid detection by REE for elimination purpose. In solving this problem, both the minimum detection time and the accuracy of the noise source location are equally important.  In this article, the problem is considered using the example of radar detection with a multi-channel receiving device and thrown noise transmitter located close to its antenna field. The schemes displaying the problem geometry for phase and difference-distance-measuring methods for determining of jammer position are presented. Expressions are formed that determine the area of uncertainty zone when jammer detecting and connection of this value with radar parameters – ranging and azimuth accuracy. The necessity of using expressions free of far zones assumptions with respect to the radar and jammer relative position is explained. Ranging based on the signal received by radar in the mode of circular or sector review is considered. The results obtained confirm the necessity to take into account the distance between the jammer and REE when implementing the basic methods for determining radiation source location.

Miniature Heat Pipes for Thermal Control of Radio-Electronic Equipment

2007 ◽  
Vol 38 (3) ◽  
pp. 245-258 ◽  
Author(s):  
Leonid L. Vasiliev ◽  
Andrei G. Kulakov ◽  
L. L. Vasiliev, Jr ◽  
Mikhail I. Rabetskii ◽  
A. A. Antukh
Keyword(s):  
Heat Pipes ◽  
Thermal Control ◽  
Electronic Equipment ◽  
Radio Electronic

ASONIKA-UM: management of electronics modeling on external influencing factors during design

2020 ◽  
pp. 51-56
Keyword(s):  
Influencing Factors ◽  
Electronic Equipment ◽  
Radio Electronic ◽  
Engineering Data

Information about ASONIKA-UM are adduced: a subsystem for controlling the modeling of radio-electronic equipment, assigned to collect engineering data in an integrated database that occurs during the design, manufacture and operation of electronic equipment, as well as to ensure the joint usage of these data. Keywords radio-electronic equipment; modeling; database; PDM system

MODEL FOR ASSESSMENT OF DECISION SUPPORT APPLICATION EFFICIENCY IN RADIO-ELECTRONIC EQUIPMENT MAINTENANCE PROCESSES

2018 ◽  
pp. 66-68
Author(s):  
V. B. Tikhonov
Keyword(s):  
Electronic Equipment ◽  
Electronic Systems ◽  
Informational Support ◽  
Military Equipment ◽  
Radio Electronic ◽  
Study Results ◽  
Feasibility Evaluation ◽  
Readiness Level ◽  
Technical Operation ◽  
Maintenance Personnel

Modern radio-electronic systems (RES) of weapons and military equipment (WME) are more functionally and structurally sophisticated that results in high requirements for their effective operation organisation. Insufficient level of technical knowledge among RES WME operational and maintenance personnel often results in increase of operability restoration period of these items in case of failures. This, in its turn, results in decrease of the readiness level of the RES WME pieces. In order to reduce duration of the RES WME restoring repair in case of failures, methods and tools of the auto-mated informational support of the operational and maintenance personnel activities related to the WME operation and restoring repair are developed. This article is devoted to development of a model of the automated informational support of the personnel activities in order to find rational options of the RES WME maintenance and repair organisation. The study results related to feasibility evaluation and development of the automated technical operation system model for the radio-electronic equipment incorporated in the AD WME are provided.

Noise source location and scaling of subsonic upper-surface blowing

2020 ◽  
Vol 19 (3-5) ◽  
pp. 191-206
Author(s):  
Trae L Jennette ◽  
Krish K Ahuja
Keyword(s):  
Strouhal Number ◽  
Noise Source ◽  
Low Frequency ◽  
Directivity Pattern ◽  
Source Location ◽  
Dipole Source ◽  
Frequency Noise ◽  
Noise Sources ◽  
Trailing Edge ◽  
Trailing Edge Noise

This paper deals with the topic of upper surface blowing noise. Using a model-scale rectangular nozzle of an aspect ratio of 10 and a sharp trailing edge, detailed noise contours were acquired with and without a subsonic jet blowing over a flat surface to determine the noise source location as a function of frequency. Additionally, velocity scaling of the upper surface blowing noise was carried out. It was found that the upper surface blowing increases the noise significantly. This is a result of both the trailing edge noise and turbulence downstream of the trailing edge, referred to as wake noise in the paper. It was found that low-frequency noise with a peak Strouhal number of 0.02 originates from the trailing edge whereas the high-frequency noise with the peak in the vicinity of Strouhal number of 0.2 originates near the nozzle exit. Low frequency (low Strouhal number) follows a velocity scaling corresponding to a dipole source where as the high Strouhal numbers as quadrupole sources. The culmination of these two effects is a cardioid-shaped directivity pattern. On the shielded side, the most dominant noise sources were at the trailing edge and in the near wake. The trailing edge mounting geometry also created anomalous acoustic diffraction indicating that not only is the geometry of the edge itself important, but also all geometry near the trailing edge.

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