Modeling and Simulation of the Propagation Characteristics by Underground Current Field

2013 ◽  
Vol 385-386 ◽  
pp. 1568-1571
Author(s):  
Yi Dong Xu
Keyword(s):  
Mathematical Model ◽  
Signal Transmission ◽  
Signal Propagation ◽  
Underground Mines ◽  
Constant Current ◽  
Propagation Characteristics ◽  
Current Field ◽  
Channel Characteristics ◽  
Underground Communication ◽  
The Mathematical Model

It's one of the effective channels for short-distance wireless communications through stratum in underground mines on emergency communications. The geologic structure is complex in mines, in practical environments. It means there is a considerable difference in conductance property and channel characteristics. In order to realize effective communication through stratum, its necessary to explore and study underground signal transmission by establishing mathematical model of underground signal propagation characteristics based on the theory of constant current field and simulating the mathematical model with MATLAB. We established a simulation model of underground communication channel physics experiments and obtained the amplitude frequency characteristic of the channel, with which we can get the error comparison between theory and test.

scholarly journals Mathematical Model for Manual Loading Activity in Underground mines

2014 ◽  
pp. 134-141
Author(s):  
V. Vidyasagar ◽  
Dr. P. N. Belkhode ◽  
Dr. J.P. Modak
Keyword(s):  
Mathematical Model ◽  
Present Method ◽  
Underground Mines ◽  
Environmental Aspects ◽  
Anthropometric Data ◽  
Work Station ◽  
Human Energy ◽  
Time Required ◽  
Air Circulation ◽  
The Mathematical Model

The paper details the approach to improve the productivity and conserving human energy in Manual loading activity. Manual loading is one of the primary activities and consumes a good amount of time for the mining crew in the underground mines. With formulation of the mathematical model, improvements in the present method of Manual loading which can conserve human energy besides increasing the productivity and reducing the time required. This mathematical model predicts the optimization of Manual loading activity. Some of the variables used to formulate this model are (1) Environment of working area, which include the ergonomic aspects; i.e. various postures of the worker, anthropometric data of the miners and environmental aspects such as illumination, ambient temperature, relative humidity and air circulation facility around the work station (2)Tools used by miner which include geometric dimensions of tools, (3) Loading of the Ore per unit time, human energy consumption etc., based on the data collected of these variables, mathematical model is formulated.

Study on the Cathodic Surface Micro-Profile Effects on the Current Filed Distribution in Processing of Electrochemical Finishing

2012 ◽  
Vol 522 ◽  
pp. 36-40
Author(s):  
Masikuda Abulihazi ◽  
Adayi Xieeryazidan
Keyword(s):  
Mathematical Model ◽  
Numerical Calculation ◽  
Current Distribution ◽  
Cathode Surface ◽  
Surface Profile ◽  
Current Field ◽  
Electrochemical Finishing ◽  
The Mathematical Model ◽  
Cathodic Surface ◽  
Leveling Effect

To improve the ECF leveling effect, according to the actual work of anodic and cathode surface micro-profile, based on the electrodynamics knowledge, established the mathematical model of current field. On the basis of this use of some software to simulate and proceeded numerical calculation, obtained for the influence rule the different cathode surface profile of the current field distribution, and was verified by the experiment. The experimental results show that the variation of the cathode surface micro-profile by changing the current distribution to affect the surface of the anodic and influence of leveling effect by copying the phenomenon will be its own surface profile is copied to the anode. The cathode surface profile is more pointed the affect for the anodic surface will be more obvious.

Experimental Study and Modeling of the Zinc Coating Thickness

2013 ◽  
Vol 712-715 ◽  
pp. 382-386 ◽  
Author(s):  
Peter Michal ◽  
Miroslav Gombár ◽  
Alena Vagaská ◽  
Ján Piteľ ◽  
Ján Kmec
Keyword(s):  
Mathematical Model ◽  
Experimental Study ◽  
Zinc Coating ◽  
Constant Current ◽  
Factor Level ◽  
Constant Current Density ◽  
Factors Affecting ◽  
Zinc Plating ◽  
The Mathematical Model

The effects of six factors, affecting during the acid zinc plating process as its technological conditions, on the thickness of the resulting zinc coating has been examined. In order to control the quality of the resulting zinc coating deposited on the surface alloy EN 355 at a constant current density of 5 [Adm-2], the mathematical model predicting the thickness of deposited coating was developed using Design of Experiments (DoE) method. The obtained mathematical model describes the resulting deposited layer of zinc coating in dependence on the factor-level changes and combinations with the reliability of 58.75%.

Modeling and Simulation of the Propagation Characteristics by Underwater Conduction Current Field

2013 ◽  
Vol 385-386 ◽  
pp. 1582-1585
Author(s):  
Wei Xue ◽  
Jun Wang
Keyword(s):  
Mathematical Model ◽  
Wireless Communication ◽  
Communication System ◽  
Short Distance ◽  
Low Noise ◽  
Underwater Communication ◽  
Propagation Characteristics ◽  
Current Field ◽  
Conduction Current ◽  
Underwater Wireless Communication

Underwater conduction current field communication is a low noise system. It is absolutely to realize the short-distance underwater wireless communication .Compared with underwater acoustic communication, because of the electrical noise underwater is very low, so using underwater current field to realize short-distance underwater wireless communication has a certain advantage. In order to implement the design of conduction current field in underwater communication system better, its necessary to explore and study underwater signal transmission by establishing mathematical model of underwater signal propagation characteristics based on the theory of constant current field and simulating the mathematical model with MATLAB. To fully understand the underwater conduction current field channel characteristics in the actual field environment, we established a simulation model of underwater conduction current field communication channel physical experiment and obtained the amplitude frequency characteristics of the channel based on the external field test data, it laid a solid foundation for the parameter selection of underwater communication system.

STBC Study on Reservoir Dispatching and Hydrology Satellite Monitor System

2012 ◽  
Vol 214 ◽  
pp. 690-694
Author(s):  
Xin Li Cao ◽  
Xian Jia Wang ◽  
Ye Zhu
Keyword(s):  
Mathematical Model ◽  
Monitoring System ◽  
Channel Capacity ◽  
Signal Transmission ◽  
Theoretical Method ◽  
Satellite Monitoring ◽  
Monitor System ◽  
Satellite Signal ◽  
The Mathematical Model

When MIMO is added in design of satellite signal transmission, it can increase channel capacity and reduce BER multiply. This paper introduced MIMO into satellite monitoring system, studied three kinds of QOSTBC on the mathematical model. Paper also analysed process of transmission for hydrology information and illustrated figures of BER for three QOSTBC. The results show that design of satellite monitoring system using MIMO has a lower BER than using SISO and the BER of rotated QOSTBC is less than other QOSTBC. The original in this paper is that it combines hydrology satellite monitoring with MIMO. It gives theoretical method for hydrology monitoring and transmission

Construction of a mathematical model of the signal propagation of the data exchange system between the control unit and the actuators located in the reactors of specialized chemical-technological equipment

2021 ◽  
Author(s):  
A.A. Kharchenko ◽  
S.I. Vidyakin ◽  
L.A. Tishchenko
Keyword(s):  
Mathematical Model ◽  
Magnetic Induction ◽  
Data Exchange ◽  
Control Unit ◽  
Signal Propagation ◽  
Metallographic Analysis ◽  
Telemetry System ◽  
Technological Equipment ◽  
Exchange System ◽  
The Mathematical Model

This paper presents a method for compiling a mathematical model of the signal propagation of the data exchange system between the control unit and the actuators located in the reactors of specialized chemical-technological equipment. The case of the implementation of a modern telemetry system and the main problems in the development of these systems are considered. To develop a mathematical model, a method was written for calculating the EMF of the secondary winding for the system under consideration, namely, the transformer with an open core. The search for a rational frequency for the simulated system is performed. The values of the magnetic induction for different distances between the windings are obtained. The scheme for studying the dependence of the magnetic induction on the magnetic field strength is assembled. To determine the grain size, a metallographic analysis of the pipeline microstructure was performed. The necessity of comparing the experimental data and the data obtained by theoretical calculation is revealed; corrections of the mathematical model are made. The signal propagation range was predicted at a distance of about a meter. Based on the comparison of the mathematical model and the experiment, it is necessary to adjust the first one and develop a methodology for choosing rational parameters of the telemetry system for designing a data exchange system. The developed mathematical model for estimating the parameters of the propagation of the e / m wave allows us to predict the propagation of the signal at a given distance.

scholarly journals A Model of Multichannel Design in Underwater Wireless Acoustic Communication: SNC

2020 ◽  
Vol 9 (4) ◽  
pp. 299-304
Keyword(s):  
Mathematical Model ◽  
Wireless Communication ◽  
Acoustic Waves ◽  
Channel Allocation ◽  
Signal Transmission ◽  
Communication Channels ◽  
Optical Wave ◽  
Communication Techniques ◽  
Sound Communication ◽  
The Mathematical Model

The structure of UWAN is problematic as the endeavors of underwater are totally disparate compared to terrestrial networks. A lot of factors which, includes the behavior of the wireless activities in underwater at the time of designing and modeling the original activities of wireless communication in underwater. Additionally, the data or signal transmission and fading losses are exceptionally high in UWAN than air. Thus, separation of communication channels is curiously inflexible to model for all purposes. The acoustic waves are the best disclosures for UWCN contrasted with other wave communication (Electromagnetic or Optical wave). The acoustics communication is demonstrated to be the best of UW in spite of the fact that they are restricted to channel allocation and bandwidth because of thermal_noise. Simultaneously acoustics_sound waves afford the sturdy communication everywhere, territory concerning separation and channel detachment appearing differently in relation to other communication techniques, because of its exceptional property has low attenuation in sound communication in underwater. In this proposal, the various parameters along with the mathematical model for multichannel communication of the acoustic_channel, attributes of acoustics, and various parameters investigated. Additionally, we investigate regulation techniques for acoustic systems that can be utilized in the transmitter and recipient.

DETERMINATION OF PERFORMANCE INDICATORS OF THE TRUCK KrAZ-6510TE

2020 ◽  
pp. 19-26
Author(s):  
Olexandr Pavlenko ◽  
Serhii Dun ◽  
Maksym Skliar
Keyword(s):  
Mathematical Model ◽  
Surface Friction ◽  
Building Structures ◽  
Maximum Torque ◽  
Military Equipment ◽  
Military Vehicles ◽  
Force Magnitude ◽  
Vehicle Mobility ◽  
The Mathematical Model

In any economy there is a need for the bulky goods transportation which cannot be divided into smaller parts. Such cargoes include building structures, elements of industrial equipment, tracked or wheeled construction and agricultural machinery, heavy armored military vehicles. In any case, tractor-semitrailer should provide fast delivery of goods with minimal fuel consumption. In order to guarantee the goods delivery, tractor-semitrailers must be able to overcome the existing roads broken grade and be capable to tow a semi-trailer in off-road conditions. These properties are especially important for military equipment transportation. The important factor that determines a tractor-semitrailer mobility is its gradeability. The purpose of this work is to improve a tractor-semitrailer mobility with tractor units manufactured at PJSC “AutoKrAZ” by increasing the tractor-semitrailer gradeability. The customer requirements for a new tractor are determined by the maximizing the grade to 18°. The analysis of the characteristics of modern tractor-semitrailers for heavy haulage has shown that the highest rate of this grade is 16.7°. The factors determining the limiting gradeability value were analyzed, based on the tractor-semitrailer with a KrAZ-6510TE tractor and a semi-trailer with a full weight of 80 t. It has been developed a mathematical model to investigate the tractor and semi-trailer axles vertical reactions distribution on the tractor-semitrailer friction performances. The mathematical model has allowed to calculate the gradeability value that the tractor-semitrailer can overcome in case of wheels and road surface friction value and the tractive force magnitude from the engine. The mathematical model adequacy was confirmed by comparing the calculations results with the data of factory tests. The analysis showed that on a dry road the KrAZ-6510TE tractor with a 80 t gross weight semitrailer is capable to climb a gradient of 14,35 ° with its coupling mass full use condition. The engine's maximum torque allows the tractor-semitrailer to overcome a gradient of 10.45° It has been determined the ways to improve the design of the KrAZ-6510TE tractor to increase its gradeability. Keywords: tractor, tractor-semitrailer vehicle mobility, tractor-semitrailer vehicle gradeability.

EXPERIMENTAL STUDIES OF CAR PROPERTIES ON A PHYSICAL MODEL

2019 ◽  
pp. 10-16
Author(s):  
Oleksii Timkov ◽  
Dmytro Yashchenko ◽  
Volodymyr Bosenko
Keyword(s):  
Mathematical Model ◽  
Remote Control ◽  
Physical Model ◽  
Model Experiment ◽  
Experimental Studies ◽  
Electrical Energy ◽  
Short Term ◽  
Motor Current ◽  
Memory Card ◽  
The Mathematical Model

The article deals with the development of a physical model of a car equipped with measuring, recording and remote control equipment for experimental study of car properties. A detailed description of the design of the physical model and of the electronic modules used is given, links to application libraries and the code of the first part of the program for remote control of the model are given. Atmega microcontroller on the Arduino Uno platform was used to manage the model and register the parameters. When moving the car on the memory card saved such parameters as speed, voltage on the motor, current on the motor, the angle of the steered wheel, acceleration along three coordinate axes are recorded. Use of more powerful microcontrollers will allow to expand the list of the registered parameters of movement of the car. It is possible to measure the forces acting on the elements of the car and other parameters. In the future, it is planned to develop a mathematical model of motion of the car and check its adequacy in conducting experimental studies on maneuverability on the physical model. In addition, it is possible to conduct studies of stability and consumption of electrical energy. The physical model allows to quickly change geometric dimensions and mass parameters. In the study of highway trains, this approach will allow to investigate the various layout schemes of highway trains in the short term. It is possible to make two-axle road trains and saddle towed trains, three-way hitched trains of different layout. The results obtained will allow us to improve not only the mathematical model, but also the experimental physical model, and move on to further study the properties of hybrid road trains with an active trailer link. This approach allows to reduce material and time costs when researching the properties of cars and road trains. Keywords: car, physical model, experiment, road trains, sensor, remote control, maneuverability, stability.

RESEARCH OF INDICATORS OF A VEHICLE WITH A DIESEL WORKING ON DIESEL AND DIESEL GAS CYCLES USING THE MATHEMATICAL MODEL

2020 ◽  
pp. 14-19
Author(s):  
Serhii Kovbasenko ◽  
Andriy Holyk ◽  
Serhii Hutarevych
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Environmental Performance ◽  
Energy Performance ◽  
Dual Fuel ◽  
Fuel System ◽  
Compressed Natural Gas ◽  
Diesel Vehicles ◽  
Diesel Cycle ◽  
The Mathematical Model

The features of an advanced mathematical model of motion of a truck with a diesel engine operating on the diesel and diesel gas cycles are presented in the article. As a result of calculations using the mathematical model, a decrease in total mass emissions as a result of carbon monoxide emissions is observed due to a decrease in emissions of nitrogen oxides and emissions of soot in the diesel gas cycle compared to the diesel cycle. The mathematical model of a motion of a truck on a city driving cycle according to GOST 20306-90 allows to study the fuel-economic, environmental and energy indicators of a diesel and diesel gas vehicle. The results of the calculations on the mathematical model will make it possible to conclude on the feasibility of converting diesel vehicles to using compressed natural gas. Object of the study – the fuel-economic, environmental and energy performance diesel engine that runs on dual fuel system using CNG. Purpose of the study – study of changes in fuel, economic, environmental and energy performance of vehicles with diesel engines operating on diesel and diesel gas cycles, according to urban driving cycle modes. Method of the study – calculations on a mathematical model and comparison of results with road tests. Bench and road tests, results of calculations on the mathematical model of motion of a truck with diesel, working on diesel and diesel gas cycles, show the improvement of environmental performance of diesel vehicles during the converting to compressed natural gas in operation. Improvement of environmental performance is obtained mainly through the reduction of soot emissions and nitrogen oxides emissions from diesel gas cycle operations compared to diesel cycle operations. The results of the article can be used to further develop dual fuel system using CNG. Keywords: diesel engine, diesel gas engine, CNG

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