Multiple-choice Classification of Radio Navigation Systems Technical State

The article shows that the use of modern navigation systems and complexes for controlling the movement of water transport vehicles allows for safe navigation. It is substantiated that the proper work of navigation equipment – radio navigation complexes – depends on their technical condition. Thus, the presence in the radio navigation complexes of water transport facilities of a large number of electronic elements and radio channels and the aggressive environment of their operation increase the role of methods and instruments for monitoring and diagnosing the technical state of the radio navigation complexes during operation to ensure the trouble-free operation of water transport facilities. In determining the technical state of the radio navigation complexes of water transport vehicles there is a known contradiction in the control of complex systems of control: the provision of a given reliability of information about the technical state of the radio navigation complexes of the movement of water transport means requires an increase in the volume and accuracy of measurements in assessing their characteristics on one side, on the other - methods for automating the process of synthesizing the measurement signals and processing feedback on them for this. Within this contradiction, the actual scientific problem is the development of methods for synthesizing measurement signals and processing reviews on them to increase the reliability and efficiency of automated control of the technical state of the radio navigation systems for controlling the movement of water transport vehicles. The purpose of this work is to develop a method for calculating the function of distribution of parameters of control of radio navigation complexes of water transport vehicles. The conditional distribution function is proposed, which is the main quantitative characteristic of the control of the radio navigation complexes of water transport facilities. This feature contains all the information about the control parameters and allows you to determine the technical state of the radio navigation complexes. The method of calculating the function of distribution of parameters of control of radio navigation complexes of water transport means is developed. Such a method is proposed to be used in substantiating the characteristics of the measuring signals of the control of the radio navigation complexes of the means of water transport during operation

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МЕТОД ДИНАМІЧНОГО ПРОГРАМУВАННЯ ЩОДО СИНТЕЗУ ВХІДНОГО ВИМІРЮВАЛЬНОГО СИГНАЛУ ДЛЯ КОНТРОЛЮ ТЕХНІЧНОГО СТАНУ РАДІОНАВІГАЦІЙНИХ КОМПЛЕКСІВ

Aerospace technic and technology ◽

10.32620/aktt.2019.3.07 ◽

2019 ◽

pp. 57-63

Author(s):

Олена Анатоліївна Дакі

Keyword(s):

Dynamic Programming ◽

Water Transport ◽

Traffic Control ◽

Complex Form ◽

Technical State ◽

Dynamic Programming Method ◽

Navigation Systems ◽

Radio Navigation ◽

Measuring Signal ◽

Method Of Dynamic Programming

The article shows that the use of modern navigation systems and complexes for controlling the movement of means of water transport makes it possible to ensure safe navigation. It is substantiated that the proper functioning of the means of navigation support – radio navigation complexes – depends on their technical condition. The work substantiates and investigates mathematical expressions for calculating the parameters of input measuring signals for controlling the technical state of radio navigation complexes. The results of the analysis of methods for determining the technical state of radio electronic devices are presented, based on studies of their dynamic characteristics. It has been shown that inertial units (elements) are used to increase the noise immunity coefficient of radio navigation complexes, which increases the time to control the harmonic signal of a sinus or cosine type. It is possible to avoid this disadvantage by using test signals with a normalized spectrum, representing the sum of a certain number of useful harmonics – test signals of complex form. The purpose of the article is to develop a method of dynamic programming for the synthesis of the input measurement signal for monitoring the state of the radio navigation complexes of the means of water transport. The obtained recurrence ratio can be used to determine the characteristics of a measuring signal in the case of continuous monitoring of the output signal. To do this, you need to replace the integral in the expression for the synthesis criterion with the corresponding integral sum. The method of dynamic programming when using personal computers in comparison with other methods has the advantage since it allows you to use a cyclic program in calculations. However, although in the dynamic programming method at each stage it is necessary to calculate and memorize only one function, with a considerable amount of coordinates (with a significant amount of control parameters and rather complex systems and complexes of navigation and traffic control of sea vessels), the volume of calculations can be very large.

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A Technique for Improving the Positioning Accuracy of Maximum-Correlation Radio Navigation Systems Through the Use of Decision Function Approximation Methods

Telecommunications and Radio Engineering ◽

10.1615/telecomradeng.v58.i9-10.150 ◽

2002 ◽

Vol 58 (9-10) ◽

pp. 9

Author(s):

Valeriy Ivanovich Antyufeev ◽

I.E. Bakulin ◽

V. N. Bykov ◽

A. M. Grichanyuk ◽

T.V. Miroshnik-Bykova

Keyword(s):

Function Approximation ◽

Decision Function ◽

Approximation Methods ◽

Navigation Systems ◽

Maximum Correlation ◽

Positioning Accuracy ◽

Radio Navigation

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The influence of unintentional radio interference on the equipment operation quality of satellite radio navigation systems consumers

Automation. Modern Techologies ◽

10.36652/0869-4931-2020-74-4-165-170 ◽

2020 ◽

pp. 165-170

Keyword(s):

Underlying Surface ◽

Navigation Systems ◽

Signal Attenuation ◽

Radio Navigation ◽

Equipment Operation ◽

Atmospheric Noise ◽

Detection Mode ◽

Signal Mode ◽

Cosmic Noise

The analysis an influence of reflections from the underlying surface, atmospheric noise, the Earth’s surface, cosmic noise and signal attenuation of the signal the atmosphere, as well as the flight dynamics of the aircraft (AC) on the signal/noise ratio and, accordingly, on the accuracy of AC navigation definitions by using consumer equipment of the satellite radio navigation systems. The analysis an influence of reflections from the underlying surface on the equipment operation quality of the satellite radio navigation systems consumers is carried out by using the Beckman model, in accordance with the earth’s surface appears to consist of flat faces with an arbitrary slope. It is noted that reflections from the underlying surface have a greater effect on the quality of functioning of the consumer equipment of the satellite radio navigation systems in the tracking signal mode than in the detection mode. In this case, the influence of reflections increases with decreasing flight altitude and an increase in the angle of heel of the AC in the direction of the navigation spacecraft.

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