Technology for Locating System of the Laying Pipe Manipulator

2009 ◽  
Vol 16-19 ◽  
pp. 25-29
Author(s):  
Dan Wang ◽  
Hong Yi Liu ◽  
Bin Li
Keyword(s):  
Mathematical Model ◽  
Control Theory ◽  
Product Development ◽  
Construction Site ◽  
Critical Question ◽  
Concrete Pipe ◽  
Locating System ◽  
The Mathematical Model ◽  
Test Result

The laying pipe manipulator is used to lay concrete pipe, and it solves the question of safety, quality, and efficiency in the pipe laying construction site, and the critical question of locating system is studied. The work principle and mathematical model of locating system were established, and the experiment of locating system was done. According to the test result, the work principle and mathematical model of locating system had turned out to be well adapted for requirement. The locating system of laying pipe manipulator can be applied to product development. The mathematical model of locating system supplies the basic control theory for the manipulator to lay and joint concrete pipe automatically.

Optimization Control of the Bullwhip Effect in Supply Chain Inventory

2014 ◽  
Vol 945-949 ◽  
pp. 3187-3190
Author(s):  
Hai Dong ◽  
Jin Hua Liu ◽  
Liang Yu Liu
Keyword(s):  
Mathematical Model ◽  
Supply Chain ◽  
Control Theory ◽  
Inventory Control ◽  
Pid Controller ◽  
Bullwhip Effect ◽  
Control Gain ◽  
Optimization Control ◽  
Suitable Combination ◽  
The Mathematical Model

The bullwhip effect was caused by fuzzy demand among the enterprises. In order to reduce this effect, control theory was applied to solve the inventory in supply chain. Firstly, inventory control in supply chain and the bullwhip effect was researched. Secondly, a kind of proportional integral differential (PID) controller was developed for inventory control in a three-level supply chain, and the mathematical model of the PID controller for inventory control was presented. Finally, the results show that the PID controller can evidently alleviate the bullwhip effect and inventory fluctuations under the suitable combination of control gain.

Yarn Feeding Compensation Algorithm and Implementation for Needbar Transverse Shifting of Carpet Tufting Machine

2011 ◽  
Vol 179-180 ◽  
pp. 150-155 ◽  
Author(s):  
Guang Feng Chen ◽  
Wei Bin Wang ◽  
Hao Chun Sun ◽  
Qing Qing Li
Keyword(s):  
Mathematical Model ◽  
Dynamic Control ◽  
Length Change ◽  
Compensation Scheme ◽  
Compensation Algorithm ◽  
Result Show ◽  
Carpet Tufting Machine ◽  
Control Principle ◽  
The Mathematical Model ◽  
Test Result

The needle bar transverse shifting will likely form the stop mark liked gap on the tufted carpet. This paper proposed the yarn feeding compensation scheme and illustrate implement method in detail. Through analysis the change in yarn feeding path and loop pile forming of carpet tufting machine, construct the mathematical model of length change of yarn feeding in path and usage of loop pile forming while needle bar shifting. According to the mathematical model for yarn feeding compensation, calculate the additional yarn feeding requirement. Base on jacquard control principle, dynamic control the yarn feed actuator to drive the yarn feed roller to delivery additional length yarn, and produce loop pile with predefined pile height, Test result show the compensation is feasible.

scholarly journals Study and Development of Robust Control Systems for Educational Drones

2021 ◽  
pp. 301-308
Author(s):  
Maria Letizia Corradini ◽  
Gianluca Ippoliti ◽  
Giuseppe Orlando ◽  
Simone Terramani
Keyword(s):  
Mathematical Model ◽  
Robust Control ◽  
Control Theory ◽  
Sliding Mode Control ◽  
Informal Education ◽  
Sliding Mode ◽  
Educational Robotics ◽  
Altitude Control ◽  
The Mathematical Model ◽  
Robust Control Systems

AbstractThis paper considers the problem of attitude and altitude control of quadrotors using the sliding mode control theory. The mathematical model of the quadrotor is derived using the Euler-Newton formalism. The sliding-mode is applied to the Parrot Mambo minidrone, which is a strong example of bringing educational robotics to formal (MATLAB, Python, JavaScript), non-formal (Tynker, Blockly, Swift Playground) and informal education. The control considered shows good performance and enhanced robustness.

A Ball-Balancing System for Demonstration of Basic Concepts in the State-Space Control Theory

1974 ◽  
Vol 11 (4) ◽  
pp. 367-376 ◽  
Author(s):  
V. Jørgensen
Keyword(s):  
Mathematical Model ◽  
Control Theory ◽  
Physical Properties ◽  
Graduate Education ◽  
State Space ◽  
The State ◽  
Basic Concepts ◽  
Conditions Of Stability ◽  
The Mathematical Model

The Ball-balancing Systems is intended to demonstrate the basic concepts in the state-space control theory in the graduate education. The physical properties of the system are stated and the mathematical model is evaluated. Conditions of stability are discussed.

scholarly journals MATHEMATICAL SIMULATION OF THE CHANGE IN HYDROGEOLOGICAL MODE ОF THE TERRITORIES RESULTING FROM THE CONSTRUCTION OF AN UNDERGROUND COMPLEX

Vestnik MGSU ◽  
2016 ◽  
pp. 52-61 ◽  
Author(s):  
Vyacheslav Valentinovich Orekhov ◽  
Sergey Nikolaevich Khokhotva ◽  
German Valer’evich Alekseev
Keyword(s):  
Mathematical Model ◽  
Water Levels ◽  
Housing System ◽  
Construction Site ◽  
Construction Simulation ◽  
Underground Structures ◽  
Foundation Pit ◽  
Hydrogeological Conditions ◽  
Soil Foundation ◽  
The Mathematical Model

One of the consequences of the construction in the conditions of dense housing system is the development of underground part of buildings, which influences the surrounding buildings, changing the stress-strain state of soil masses and hydrogeological conditions of the construction site. The damming effect leads to local increase of hydrostatical pressure of ground waters on underground structures. The authors present a description of hydrogeological conditions of the construction site of underground construction and mathematical geofiltration model of the soil foundation. The results of numerical investigation of the change in the hydrogeological mode of the construction area in case of enveloping the foundation pit with the wall in the ground are considered. On the first stage the basic mathematical model was calibrated by variation of the values of geofiltration parameters of water-bearing sediments and water-resistant mass and the values of infiltration recharge. The validation criterion of the mathematical model was the good agreement of the modeled and real ground water levels obtained as a result of compilation of the existing geological and hydrogeological materials. The construction simulation was carried out in a multivariant formulation for the conditions of entirely impenetrable wall in the ground with the filtration coefficient 0.001 m/day.

A CONTROL THEORY APPROACH TO CANCER REMISSION AIDED BY AN OPTIMAL THERAPY

2010 ◽  
Vol 18 (01) ◽  
pp. 75-91 ◽  
Author(s):  
SIDDHARTHA P. CHAKRABARTY ◽  
SANDIP BANERJEE
Keyword(s):  
Mathematical Model ◽  
Immune Response ◽  
Control Theory ◽  
Malignant Tumors ◽  
Interleukin 2 ◽  
Cellular Immunotherapy ◽  
Theory Approach ◽  
Optimal Therapy ◽  
Cancer Remission ◽  
The Mathematical Model

The mathematical model depicting cancer remission as presented by Banerjee and Sarkar1is reinvestigated here. Mathematical tools from control theory have been used to analyze and determine how an optimal external treatment of Adaptive Cellular Immunotherapy and interleukin-2 can result in more effective remission of malignant tumors while minimizing any adverse affect on the immune response.

Research on Anti-Collision Technology among Tower Cranes

2011 ◽  
Vol 130-134 ◽  
pp. 1953-1957
Author(s):  
Guang Ming Lv ◽  
Jian Wang ◽  
Qing Zhang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Construction Site ◽  
The Core ◽  
The Mathematical Model

According to the collision of tower cranes working on the construction site, this paper establishes the mathematical model of the tower cranes first, and analyzes several possibilities of collisions. The model is based on homogeneous transformation, thus the distance between tower cranes which is dangerous can be calculated accurately, then the monitor will give an alarm. Based on Visual C++ 6.0, the calculation program is provided as the core of the control system. At the same time, the algorithm and methods to adjust flat arm tower cranes are introduced in this paper, and they are verified by examples through running the program.

scholarly journals ANÁLISE DO ESTILO DE TRABALHO EM RELAÇÃO AO ALINHAMENTO CULTURAL DE DETERMINADO GRUPO DE ESTUDANTES DA ENGENHARIA QUÍMICA NA UFV

2017 ◽  
Vol 4 (1) ◽  
pp. 0001-0013
Author(s):  
Daniel Bigonha Guilhermino ◽  
Henrique De Melo Silva ◽  
Jussara Valente Roque ◽  
Vinícius Catão de Assis Souza
Keyword(s):  
Mathematical Model ◽  
Euclidean Distance ◽  
Engineering Students ◽  
Chemical Engineering ◽  
Student Organizations ◽  
Visual Examination ◽  
The Mathematical Model ◽  
Test Result

Buscou-se compreender a influência dos estilos de trabalho na relação de alinhamento cultural entre estudantes de Engenharia Química da Universidade Federal de Viçosa e um grupo de empresas. Aplicou-se o teste de estilos de trabalho da Fundação Estudar e utilizou-se o modelo matemático de PCA para análise visual dos resultados. Com o cálculo da distância euclidiana entre o estudante e as empresas, obteve-se aquela com a qual o estudante apresenta maior compatibilidade. Verificou-se que as empresas se diferenciaram dos estudantes de modo geral e que a proximidade entre esses elementos tende a aumentar no decorrer do curso. Constatou-se que o fator Organizações Estudantis contribui para a aproximação dos estudantes às empresas e que a realização de estágios e projetos de Iniciação Científica ou Extensão não se mostraram relevantes nesse quesito. Dentre os atributos mensurados pelo teste, destacaram-se: Orientação pra Resultado, Ênfase em Recompensa, Agilidade e Agressividade.This paper aimed to comprehend the influence of the organizational cultural profile (OCP) between Chemical Engineering students at Federal University of Viçosa (Brazil) and a group of companies. The OCP test was provided by Fundação Estudar, and the mathematical model of PCA was used for visual examination of the results. By calculating the euclidean distance between the student and each company, it was possible to establish which company was closest in affinity with each student. It was found that companies differed from students in general, and that the proximity between these elements tends to increase during the progression of the course. The Student Organizations factor contributes to increase the proximity between students and companies, while studentships and Scientific or Extension Projects did not show relevance in this subject. Among the attributes measured by the OCP test, “Result Orientation”, “Emphasis on Reward”, “Agility” and “Aggressiveness” are highlighted.

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.

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