scholarly journals Modeling and simulation of water levels control in open canals using Simulink

2021 ◽  
Vol 939 (1) ◽  
pp. 012028
Author(s):  
R Baratov ◽  
T Bon ◽  
Y Chulliyev ◽  
Yu Shoyimov ◽  
M Abdullayev
Keyword(s):  
Modeling And Simulation ◽  
Pid Control ◽  
Control Object ◽  
Vegetation Period ◽  
Water Levels ◽  
Functional Diagram ◽  
Energy Resources ◽  
Dynamic State ◽  
Know How ◽  
The Mathematical Model

Abstract This paper discusses the question of modeling and simulation of water levels control in open canals as a key decition of water and energy resources scarsity in the vegetation period of agricultural irrigation. The mathematical model of the water levels control in open canals is developed and the outcomes are evaluated using by Matlab’s tool Simulink. In addition, the paper proposes that the pivot weir or overshot gate for water levels control in open canals is simple in terms of precise and quality control of the upstream and downstream water levels control. Then dynamic equation of control object that describes dynamic state of the water levels control was obtained. A functional diagram has been developed and PID control was applied for the water levels control in the open canals. PID control was applied for the water levels control in the open canals to know how faster response the object to disturbance. Based on functional diagram the model of the system was built in Simulink environment and obtained the dynamic response.

Modelling and Simulation of NO2 Dispersion Phenomenon in Atmosphere by Analytical-Experimental Methods

2008 ◽  
Vol 59 (10) ◽  
Author(s):  
Delia Perju ◽  
Harieta Pirlea ◽  
Gabriela-Alina Brusturean ◽  
Dana Silaghi-Perju ◽  
Sorin Marinescu
Keyword(s):  
Mathematical Model ◽  
Nitrogen Dioxide ◽  
Modeling And Simulation ◽  
Human Health ◽  
Experimental Methods ◽  
Negative Effects ◽  
Real Situation ◽  
Experimental Values ◽  
The Mathematical Model

The European laws and recently the Romanian ones impose more and more strict norms to the large nitrogen dioxide polluters. They are obligated to continuously improve the installations and products so that they limit and reduce the nitrogen dioxide pollution, because it has negative effects on the human health and environment. In this paper are presented these researches made within a case study for the Timi�oara municipality, regarding the modeling and simulation of the nitrogen dioxide dispersion phenomenon coming from various sources in atmosphere with the help of analytical-experimental methods. The mathematical model resulting from these researches is accurately enough to describe the real situation. This was confirmed by comparing the results obtained based on the model with real experimental values.

scholarly journals The identification of a device based on a Peltier element by the least squares method

2020 ◽  
pp. 17-27
Author(s):  
Vladimir Grinkevich ◽  
Keyword(s):  
Mathematical Model ◽  
Least Squares ◽  
Least Squares Method ◽  
Control Object ◽  
Object Identification ◽  
Model Parameters ◽  
Peltier Element ◽  
Transport Delay ◽  
Non Linear ◽  
The Mathematical Model

The evaluation of the mathematical model parameters of a non-linear object with a transport delay is considered in this paper. A temperature controlled stage based on a Peltier element is an identification object in the paper. Several input signal implementations are applied to the input of the identification object. The least squares method is applied for the calculation of the non-linear differential equitation parameters which describe the identification object. The least squares method is used due to its simplicity and the possibility of identification non-linear objects. The parameters values obtained in the process of identification are provided. The plots of temperature changes in the temperature control system with a controller designed based on the mathematical model of the control object obtained as a result of identification are shown. It is found that the mathematical model obtained in the process of identification may be applied to design controllers for non-linear systems, in particular for a temperature stage based on a Peltier element, and for self-tuning controllers. However, the least square method proposed in the paper cannot estimate the transport delay time. Therefore it is required to evaluate the time delay by temperature transient processes. Dynamic object identification is applied when it is required to obtain a mathematical model structure and evaluate the parameters by an input and output control object signal. Also, identification is applied for auto tuning of controllers. A mathematical model of a control object is required to design the controller which is used to provide the required accuracy and stability of control systems. Peltier elements are applied to design low-power and small- size temperature stage . Hot benches based on a Peltier element can provide the desired temperature above and below ambient temperature.

scholarly journals Using models of energy consumption from influencing factors to assess the current state and energy efficiency forecasting

2020 ◽  
Vol 220 ◽  
pp. 01024
Author(s):  
Deniz Moroz ◽  
Nadzeya Hruntovich ◽  
Aliaksei Kapanski ◽  
Yauhen Shenets ◽  
Mikhail Malashanka ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Influencing Factors ◽  
Factor Model ◽  
Energy Resource ◽  
Energy Resources ◽  
Simple Relationship ◽  
Production Program ◽  
Current State ◽  
The One ◽  
The Mathematical Model

A complex of tasks that can be solved using mathematical models of the dependence of consumed energy resources on influencing factors are considered in the article. The main type of model for industrial consumers with a simple relationship between energy and technology, is the one-factor model “consumed energy resource-volume of output”. For industrial consumers with a complex relationship between energy and technology, the mathematical model of the dependence of energy resources on technology is determined by several factors. Methods for assessing the current state of energy efficiency, as well as predicting it for the future in the context of the introduction of energy saving measures and changes in the production program were proposed.

Design and Simulation of DC Speed Regulating System Based on Fuzzy Control

2012 ◽  
Vol 220-223 ◽  
pp. 1258-1261
Author(s):  
Li Hong Wang
Keyword(s):  
Pid Control ◽  
Pid Controller ◽  
Control Method ◽  
Dynamic State ◽  
State Function ◽  
Fuzzy Pid ◽  
Fuzzy Pid Controller ◽  
On Line ◽  
Start Process ◽  
The Ideal

PID control is adopted in traditional DC speed regulating system. In start process the current super adjustment value is big. When adding load perturbation and voltage perturbation suddenly, its dynamic state function will be decended. Aimming at this problem, a kind of improved system was put forward. The speed modulator used fuzzy PID controller, according to e and ec, the parameters of the modulator can be modified on line. The current modulator adopted integral separable PID control method. The simulation results indicated that the improved system has better dynamic state function and anti- Rao function. Particularly the start current wave closes to the ideal rectangle wave more. So the responding speed of the system can be sped.

Techniques of testing algorithms for controlling spacecraft angular motion

2020 ◽  
Author(s):  
S.A. Merkuryev
Keyword(s):  
Dead Zone ◽  
Control Object ◽  
Angular Motion ◽  
Control Mode ◽  
External Effects ◽  
Measuring Device ◽  
Testing Algorithms ◽  
Pointing Control ◽  
The Mathematical Model ◽  
Working Out

The paper considers the technique of the initial developing algorithms for controlling the angular motion of an automatic spacecraft as a solid body. The mathematical model of the control object is given by the Euler’s dynamic equations and kinematic equations written using the Rodrig — Hamilton parameters. The technique has a simple form and is intended for control algorithm rough testing. Its structure allows adding complexity in the initial model of the system by adding models of onboard devices and external effects. The efficiency of the method was tested on the example of working out an algorithm with a dead zone for the solar-pointing control mode of an automatic spacecraft. In this mode, a solar sensor was used as a measuring device, and flywheel engines were used as executive bodies. The results of simulation in the MathWorks MATLAB environment are presented.

Simulation Study on Travel-Driven System of HST Loader with Matlab/Simulink

2013 ◽  
Vol 313-314 ◽  
pp. 1100-1104
Author(s):  
En Zhe Song ◽  
Chang Xi Ji ◽  
Mei Liang Yin ◽  
Jun Sun ◽  
Cheng Shun Yin
Keyword(s):  
Pid Control ◽  
Theoretical Basis ◽  
Control Algorithm ◽  
High Efficiency ◽  
Practical Significance ◽  
Matlab Simulink ◽  
Loop Control ◽  
Driven System ◽  
Close Loop Control ◽  
The Mathematical Model

This paper establishes the mathematical model of the volume speed-modulating system and simulates dynamically with Matlab/Simulink. Provide a theoretical basis for algorithm of close loop control [ of the three variables which are diesel engines, variable pump and variable motor. Use PID control algorithm, through simulation and analysis, find out the parameter optimization adjustment rule [2,, seek matching operation between three variables. Provide a theoretical basis for the study on dynamic system of full-hydraulic loaders and have very important practical significance in realizing high efficiency energy saving and reducing energy consumption.

scholarly journals Modeling and Simulation of Aviation Engine Ignition Spark Frequency Disorder

2015 ◽  
Vol 9 (1) ◽  
pp. 193-199 ◽  
Author(s):  
Shi Xudong ◽  
Li Hongguang ◽  
Wang Ruowen ◽  
Xu Meng
Keyword(s):  
Mathematical Model ◽  
Fault Diagnosis ◽  
Modeling And Simulation ◽  
Circuit Simulation ◽  
Aircraft Engine ◽  
Safety And Reliability ◽  
Fault Mechanism ◽  
The Mathematical Model ◽  
Ignition Device

Igniter is an important part of aircraft engine, which should be reliable to ensure safety. Spark frequency disorder is common fault to the aviation ignition device, and it is great hidden danger to the aircraft engine. To guarantee the safety and reliability of aviation igniter, the fault mechanism of the aviation ignition spark frequency disorder is researched in this paper. The factors which will result in spark frequency disorder are studied, and the mathematical model of the ignition circuit and circuit simulation are presented, which lays the foundation for the follow-up research on the design of aviation ignition and the fault diagnosis.

scholarly journals MODELING THE WORK FLOW OF CUT-OUT SPHERICAL DISKS WITH HYDRAULIC DRIVE FOR FIRE-FIGHTING SOIL-THROWER

2020 ◽  
Vol 10 (1) ◽  
pp. 185-192
Author(s):  
Maksim Gnusov ◽  
Mikhail Drapalyuk ◽  
P. Popikov ◽  
N. Sherstyukov
Keyword(s):  
Mathematical Model ◽  
Forest Fire ◽  
Cutting Edge ◽  
Fire Fighting ◽  
Dynamic State ◽  
Soil Environment ◽  
Spherical Elements ◽  
Working Bodies ◽  
The Mathematical Model ◽  
The Relationship

In this article, considerable attention is paid to the method of mathematical creation of a structurally complex soil environment with vegetation. Structural and technological parameters of the interaction of the working bodies of the fire-fighting soil thrower with soil have been determined using a simulation-physical-mathematical model of the spherical disk relationship with the soil environment. The disk is equipped with a cutting edge with semicircular cuts. The mathematical model presents complex geometry of all forms of active work planes, as well as the relationship of the working bodies with soil elements. Surfaces of complex construction in the process of applying the finite element method have been transformed into a large number of simplified planar figures. The soil in the simulation physical-mathematical model is described as a complex system of a large number of spherical elements, determinately connecting with each other, as well as with the working planes of the machine. It has been determined that the relationship between the soil particles during deformation is viscoelastic in its nature. The calculation of forces is presented in the form of an algorithm for the interaction of elements on each other in relation to the distance of their location. The equations of motion are used that describe the change in the dynamic state of the soil over time. The movement of the working bodies of the unit, including spherical disk working bodies with cutouts in the framework of the mathematical model, has been considered in the simulated space, described as a parallelepiped. The ability to simulate the interaction of the working bodies of a forest fire soil-throwing machine with a working medium, including plant roots, which are located next to each other in the form of spherical elements in the geometric region. The task of increasing the efficiency of the forest fire-fighting soil-throwing machine when laying fire strips has been solved by improving the quality of preparing the soil shaft with spherical hydraulic disks equipped with a cutting edge with semicircular cuts, which are subsequently taken by thrower-cutters and feed the soil flow in a given direction

scholarly journals Assessment of an enterprise’s energy security based on multi-criteria tasks modeling

2018 ◽  
Vol 16 (4) ◽  
pp. 102-116 ◽  
Author(s):  
Mykhaylo Voynarenko ◽  
Mariia V. Dykha ◽  
Oksana Mykoliuk ◽  
Ludmyla Yemchuk ◽  
Anastasiia Danilkova
Keyword(s):  
Energy Security ◽  
Influence Factors ◽  
Security System ◽  
Energy Resources ◽  
Managerial Decisions ◽  
Cost Of Energy ◽  
Methodical Approach ◽  
Business Entities ◽  
Main Components ◽  
The Mathematical Model

Today Ukrainian business entities operate in conditions of macroeconomic instability, environmental disturbance, energy dependence on risk of instable and interrupted supply and high cost of energy resources, excessive energy consumption and inefficient use of fuel and energy resources, which requires immediate actions as for finding solutions to ensure energy security. The goal of the article is to solve multi-criteria tasks focused on making managerial decisions regarding the development of enterprise energy security system based on evaluation of influence of numerous factors. As a result of this study, main components of energy security of the enterprise and most important influence factors are determined. The mathematical model of the hierarchy of factors in terms of their influence on the energy security of the enterprise with the use of graph theory is developed. Use of iterative procedure to determine the levels of hierarchy of factors allowed to assess the importance/priority of their influence on energy security of the enterprise. Thus, the developed model of hierarchy of factors based on the applied scientific and methodical approach to determine their influence on energy security of the enterprise provides the opportunity to get a detailed idea of factors interaction, interconnections and influence on energy security of the enterprise, which ultimately leads to elaboration of complex optimal/agreed managerial decisions in context of development and implementation of energy security system of the enterprise.

Sign in / Sign up

Export Citation Format

Share Document