scholarly journals Problems and Directions in Development of Domestic Ground Stations for Spacecraft Command and Measurement Systems

2021 ◽  
Vol 8 (3) ◽  
pp. 81-88
Author(s):  
A. I. Zhodzishskiy ◽  
◽  
A. V. Kruglov ◽  
D. N. Nagornykh ◽  
◽  
...  
Keyword(s):  
Information Security ◽  
Development Time ◽  
Block Diagram ◽  
Import Substitution ◽  
Measurement Systems ◽  
Ground Station ◽  
Safe Control ◽  
And Control

The article analyzes the evolution of telemetry, tracking and control (TT&C) for spacecraft in recent decades. It shows that the main problems in the development of domestic ground stations of TT&C are related to unification, overcoming departmental interests, import substitution, and ensuring information security. The ways to solve these problems are proposed. A block diagram of a ground station of TT&C capable of providing control of the main existing and prospective near-Earth satellites in their assigned frequency ranges is presented. The purpose of the development of domestic ground stations of TT&C in the coming years should be to ensure sustainable operational and safe control of an increasing number of spacecraft while reducing the development time and costs of their creation and operation.

scholarly journals BLOCK DIAGRAM OF A MULTI-FREQUENCY RADIOMETRIC COMPLEX FOR UAV DETECTION IN DIFFERENT METEOROLOGICAL CONDITIONS

2021 ◽  
pp. 50-57
Author(s):  
Nikolay Ruzhentsev ◽  
Simeon Zhyla ◽  
Vladimir Pavlikov ◽  
Gleb Cherepnin ◽  
Eduard Tserne ◽  
...  
Keyword(s):  
Thermal Radiation ◽  
Traffic Control ◽  
Block Diagram ◽  
Meteorological Conditions ◽  
Measurement Systems ◽  
Detection Systems ◽  
Cloudy Atmosphere ◽  
Highly Sensitive ◽  
Terrorist Acts ◽  
And Control

Background. Technologies for the production of unmanned aerial vehicles (UAVs) of various classes are rapidly developing in Ukraine and the world. Small in terms of weight and dimensions and almost invisible for most information and measurement systems, UAVs began to be used in various industries - from the national economy to multimedia and advertising. Together with their useful application, new dangers and incidents have appeared - a collision of UAVs with people, structures, cultural monuments, the transportation of criminal goods, terrorist acts, flights over prohibited areas and within airports. UAV detection and control of their movement in populated areas and near critical objects are becoming one of the most important tasks of air traffic control services. The existing systems of the optical, acoustic and radar ranges cannot effectively perform such tasks in difficult meteorological conditions. As an addition to the already developed detection systems, it is proposed to use radiometric systems that register the UAV's own radio-thermal radiation. The authors have developed the theoretical foundations for the construction of multifrequency complexes necessary for the specification of their structural schemes. Objective. The purpose of the paper is development of a scheme for a multi-frequency radiometric complex for detecting UAVs in different meteorological conditions based on optimal algorithms. Methods. Analysis of the experience in the development of radiometric systems and methods for dealing with fluctuations in the gain of receivers, optimal operations for processing signals of intrinsic radio-thermal radiation, investigations of the probabilistic characteristics of detection and analysis of the domestic market of microwave technology developers will make it possible to develop a scheme of a multifrequency radiometric complex that will perform reliable measurements in various meteorological conditions. Results. A block diagram of a four-frequency radiometric complex is proposed, which can be implemented in practice and is capable of performing reliable measurements in various meteorological conditions. The frequencies 10 GHz, 20 GHz, 35 GHz, and 94 GHz were chosen as the resonant frequencies for tuning the radiometric receivers. For a given design and characteristics of receivers, the probabilities of detecting a UAV were calculated depending on the range of its flight. Conclusions. From the results of the analysis of the existing achievements in the development of radiometric systems in Ukraine and the elemental base of microwave components available on the market, it follows that the Ku and K bands have the worst characteristics of spatial resolution, but are all-weather. The Ka and W bands are highly sensitive to radio-thermal radiation against the background of a clear sky, but are completely "blind" in a cloudy atmosphere and in rain. The results of calculating the detection ranges with a probability of 0.9 lie in the range from 1 to 3 km, depending on the condition of the atmosphere. These results coincide with the known detection ranges of optical, acoustic and radar systems, but the selected parameters of the receivers do not correspond to potential world achievements and can be improved.

Industry 4.0 Digital Technologies for data collection and control

2021 ◽  
pp. 43-58
Author(s):  
S. S. Yudachev ◽  
P. A. Monakhov ◽  
N. A. Gordienko
Keyword(s):  
Data Collection ◽  
Open Source ◽  
Software Defined Radio ◽  
Block Diagram ◽  
Data Access ◽  
Gnu Radio ◽  
Time Data ◽  
Object A ◽  
Data Propagation ◽  
And Control

This article describes an attempt to create open source LabVIEW software, equivalent to data collection and control software. The proposed solution uses GNU Radio, OpenCV, Scilab, Xcos, and Comedi in Linux. GNU Radio provides a user-friendly graphical interface. Also, GNU Radio is a software-defined radio that conducts experiments in practice using software rather than the usual hardware implementation. Blocks for data propagation, code deletion with and without code tracking are created using the zero correlation zone code (ZCZ, a combination of ternary codes equal to 1, 0, and –1, which is specified in the program). Unlike MATLAB Simulink, GNU Radio is open source, i. e. free, and the concepts can be easily accessed by ordinary people without much programming experience using pre-written blocks. Calculations can be performed using OpenCV or Scilab and Xcos. Xcos is an application that is part of the Scilab mathematical modeling system, and it provides developers with the ability to design systems in the field of mechanics, hydraulics and electronics, as well as queuing systems. Xcos is a graphical interactive environment based on block modeling. The application is designed to solve problems of dynamic and situational modeling of systems, processes, devices, as well as testing and analyzing these systems. In this case, the modeled object (a system, device or process) is represented graphically by its functional parametric block diagram, which includes blocks of system elements and connections between them. The device drivers listed in Comedi are used for real-time data access. We also present an improved PyGTK-based graphical user interface for GNU Radio. English version of the article is available at URL: https://panor.ru/articles/industry-40-digital-technology-for-data-collection-and-management/65216.html

scholarly journals Preliminary Design of Monitoring and Control Subsystem for GNSS Ground Station

2008 ◽  
Vol 25 (2) ◽  
pp. 227-238
Author(s):  
Seong-Kyun Jeong ◽  
Jae-Eun Lee ◽  
Han-Earl Park ◽  
Sang-Uk Lee ◽  
Jae-Hoon Kim
Keyword(s):  
Preliminary Design ◽  
Monitoring And Control ◽  
Control Subsystem ◽  
Ground Station ◽  
And Control

A Mark-Up Language for the Specification of Information Security Governance Requirements

2013 ◽  
pp. 103-123
Author(s):  
Anirban Sengupta ◽  
Chandan Mazumdar
Keyword(s):  
Information Systems ◽  
Information Security ◽  
Security Requirements ◽  
Security Requirement ◽  
Security Governance ◽  
Digital World ◽  
Information Security Governance ◽  
Version 2.0 ◽  
Enterprise Security ◽  
And Control

As enterprises become dependent on information systems, the need for effective Information Security Governance (ISG) assumes significance. ISG manages risks relating to the confidentiality, integrity and availability of information, and its supporting processes and systems, in an enterprise. Even a medium-sized enterprise contains a huge collection of information and other assets. Moreover, risks evolve rapidly in today’s connected digital world. Therefore, the proper implementation of ISG requires automation of the various monitoring, analysis, and control processes. This can be best achieved by representing information security requirements of an enterprise in a standard, structured format. This paper presents such a structured format in the form of Enterprise Security Requirement Markup Language (ESRML) Version 2.0. It is an XML-based language that considers the elements of ISO 27002 best practices.

CPS Security

2015 ◽  
pp. 119-139
Keyword(s):  
Information Security ◽  
Control Theory ◽  
Control Systems ◽  
Distributed System ◽  
Cyber Physical Systems ◽  
Physical Systems ◽  
Secure Control ◽  
Structured Information ◽  
Specialized Experts ◽  
And Control

Information security can be efficiently provided by the sound structured information and a set of specialized experts in the field of IT and CPS. The interconnection among the systems in the CPS imposes a new challenge in providing security to CPS. A concise study of CPS security is given in this chapter. The problem of secure control systems is also indentified and defined. The way the information security and control theory guards the system is explored. The security of CPSs can be enhanced using a particular set of challenges, which are also described later in this chapter. The resistance to malicious events is strengthening as cyber physical systems are part of critical structures. The CPSs are time sensitive in nature, unlike the distributed system where a little amount of delay is acceptable.

The utilization of trend analysis in the effective monitoring of information security. Part 2: the model

2002 ◽  
Vol 10 (1) ◽  
pp. 5-11
Author(s):  
Martin Botha ◽  
Rossouw von Solms
Keyword(s):  
Information Security ◽  
Computer Security ◽  
Trend Analysis ◽  
Computer Crime ◽  
Federal Bureau ◽  
Crime Problem ◽  
Federal Bureau Of Investigation ◽  
Computer Hacking ◽  
The Usa ◽  
And Control

A survey recently completed by the Computer Security Institute (CSI) and the Federal Bureau of Investigation (FBI) revealed that corporations, banks, and governments all face a growing threat from computer crime, and in particular computer hacking. Computer hacking activities caused well over US$100 million in losses last year in the USA and the trend toward professional computer crime, such as computer hacking, is on the rise. Different methods are currently used to control the computer crime problem, for example, by controling access to and from a network by implementing a firewall. As the survey highlighted, most of these methods are insufficient. New means and ways which will minimise and control the hacking problem must therefore continuously be researched and defined. Proposes a method, using trend analysis, that could be utilized to minimise and control the hacking problem in an organisation.

A TRIBOLOGICAL TEST RIG FOR FIBRES, CABLES, AND PLAITINGS

Tribologia ◽  
2018 ◽  
Vol 271 (1) ◽  
pp. 51-55
Author(s):  
Piotr KOWALEWSKI ◽  
Anna BROŃCZYK ◽  
Wojciech WIELEBA
Keyword(s):  
Control Systems ◽  
Friction And Wear ◽  
Machine Design ◽  
Testing Device ◽  
Test Rig ◽  
Tribological Test ◽  
Measurement Systems ◽  
Innovative System ◽  
New Type ◽  
And Control

The paper presents a description of the mechanical construction, measuring and control systems and the possibilities of a new type tribological testing device. The design was developed and built at the Department of Fundamentals of Machine Design and Tribology of Wroclaw University of Science and Technology. Described tester allows the investigate a friction and wear of components such as fibrous tapes, ropes, plaitings or fibers themselves in contact with solid materials. The paper describes in detail the construction of drive and the load pneumatic system. The innovative system of the device such measurement equipped with piezoelectric sensors and an experimental fixing unit of tested components also have been described. Work includes diagrams of used control and measurement systems and the central lubrication system. As a test the polyethylene cable in contact with brass rods has been examined. The results of this studies were been also presented in the paper.

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