scholarly journals Communication Subsystems for Satellite Design

2020 ◽  
Author(s):  
Hung H. Nguyen ◽  
Peter S. Nguyen
Keyword(s):  
Satellite Design ◽  
Communication Subsystems

The Interdisciplinary Functional-Dynamic Approach to the Analysis of the Political System of Modern Society

2020 ◽  
pp. 83-89
Author(s):  
D. V. Bobrov ◽  
A. A. Shulus ◽  
F. F. Farisov
Keyword(s):  
Social Sciences ◽  
Political System ◽  
Modern Society ◽  
The Political ◽  
Dynamic Approach ◽  
Communication Subsystems ◽  
Interdisciplinary Study ◽  
Technological Communication

The authors analyze different approaches to the study of the political system of society (PSO) in various social sciences. The prospects of an interdisciplinary study of PSO based on the llocation of several subsystems with various functions are substantiated. The characteristic of various functional subsystems of the PSO is given, among them: institutional, regulatory, ideological, technological, communication subsystems

scholarly journals Very-Small-Satellite Design for Distributed Space Missions

2007 ◽  
Vol 44 (6) ◽  
pp. 1294-1306 ◽  
Author(s):  
David J. Barnhart ◽  
Tanya Vladimirova ◽  
Martin N. Sweeting
Keyword(s):  
Space Missions ◽  
Small Satellite ◽  
Satellite Design

scholarly journals Design optimization of the satellite in precessional transmission

2018 ◽  
Vol 178 ◽  
pp. 05008
Author(s):  
Stanislav Lealin
Keyword(s):  
Noise Reduction ◽  
Load Capacity ◽  
Elastic Compliance ◽  
Complex Structures ◽  
The Finite Element Method ◽  
Linear Deformation ◽  
Satellite Design ◽  
Deformation Simulation ◽  
Contact Loads ◽  
Radial Channel

One of the important tasks in the design of gears and gearboxes based on them is to increase the load capacity, durability and noise reduction with moderate requirements for manufacturing precision by providing elastic compliance of the teeth with simple satellite manufacturing technology. In the paper is firstly presented a base satellite in a precessional transmission. The design is rigid and non-technological. There was simulated the workload and the results are presented as a linear deformation. Simulation was based on the special module for the calculation and analysis of complex structures using the integrated module Stress Analysis (program Autodesk Inventor Professional 2012). It uses the finite element method calculation, based on the ANSYS program. Then is shown an optimized satellite structure. This option provides an increased durability and noise reduction due to local and general tooth compliance. The main drawback of this satellite is the high laboriousness of making cut-outs in the satellite. In this satellite, by increasing the diameter of the radial channel, it is possible to reduce the wall thickness and thereby increase the compliance. The simulation results of a new satellite design are presented. Compliance increased roughly by 4 times compared to the base version. When the gear is in mesh with the satellite, due to the increased elastic compliance of the teeth, a multi-pairing mesh is achieved, which reduces the contact loads and noise, increases the service life of the transmission.

Survey and Examination of Various CBTC Data Communications Subsystems

2013 ◽  
Author(s):  
Michael Fitzmaurice
Keyword(s):  
North America ◽  
Best Practice ◽  
Data Communication ◽  
Data Communications ◽  
Innovative Design ◽  
Train Control ◽  
Communication Subsystems

This paper will survey and describe the various data communication subsystems (DCSs) used on many communications based train control (CBTC) system projects planned and in service throughout North America, Europe and Asia. The paper will focus on the RF characteristics of the DCS so as to highlight the similarities and common challenges that all DCSs face with a view to presenting best practice and innovative design.

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