scholarly journals Tests of an Innovative Controller Designed to Control the Powered Roof Support

2018 ◽  
Vol 1 (1) ◽  
pp. 223-231 ◽  
Author(s):  
Dawid Szurgacz ◽  
Horst Gondek
Keyword(s):  
Control System ◽  
High Efficiency ◽  
Response Times ◽  
Support Section ◽  
Control Block ◽  
Basic Part ◽  
Control Functions ◽  
Basic Functions ◽  
The Moment ◽  
Roof Support

Abstract The article presents the methodology and results of tests of a prototype controller designed for the electrohydraulic control system of a powered roof support. This controller is the basic part of the developed, innovative control system. The tests were carried out on a custom-designed testing station, equipped with one section of a roof support. The aim of the research was to check the functionality and speed of the controller's response while working with the actual support section. The tested controller and the control system has a modular structure, which greatly facilitates its operation and use. Measurements of control functions were carried out on the controller connected to the electrohydraulic control block. The research mainly focused on determining the period starting from the moment of providing the signal to the moment of switching on the basic functions performed by the support section. The obtained results confirm the assumptions made. The controller's operation is very stable, and its response times are very short. It can therefore be assumed that the tested controller is correctly designed and constructed. This creates great possibilities for its practical application in the built-in system for controlling the roof support. This may be particularly important in the case of high-efficiency longwall complexes, for which wireless control of the support is planned to be used. The presented research methodology and obtained results should therefore be an important source of information in the field of testing controllers for powered roof supports.

scholarly journals Analysis of Powered Roof Support Operation Based on a Virtual Driver

2018 ◽  
Vol 1 (1) ◽  
pp. 415-421
Author(s):  
Dawid Szurgacz ◽  
Jarosław Brodny
Keyword(s):  
Basic Element ◽  
Basic Part ◽  
Control Functions ◽  
Wide Range ◽  
Powered Support ◽  
Mining Machinery ◽  
New Research ◽  
Near Future ◽  
Roof Support ◽  
Virtual Driver

Abstract The article presents the results of tests and analyses of control functions performed by a powered roof support which is the basic part of a powered longwall system. The research was based on an innovative registration and measurement system dedicated to this specific range of tests. The basic element of this system is a virtual driver. It is equipped with input and output systems to connect standard physical voltage signals. The tests were carried out on a prototype powered roof support type ZPR- 15/35-POz. The presented research methodology and obtained results are an element of new research methods developed for powered support based on virtual controllers. The applied solution generates less costs than the devices currently used, while its functionality is significantly greater. The system developed by the Authors supports innovative and, to a certain extent, intelligent IT solutions for testing control elements. This developed system is suitable to be applied in a wide range of research such as diagnosis of mining machinery control elements and other industries in the near future.

scholarly journals Research on the Effectiveness of the Actuating Element of the Electro Control System for the Powered Roof Support

2018 ◽  
Vol 41 ◽  
pp. 03016
Author(s):  
Dawid Szurgacz ◽  
Jarosław Brodny
Keyword(s):  
Control System ◽  
High Efficiency ◽  
Underground Mining ◽  
Control Function ◽  
Solenoid Valve ◽  
Hydraulic Control ◽  
Modular Construction ◽  
Control Units ◽  
Time Dependencies ◽  
Roof Support

The development of high-efficiency longwall complexes in underground mining enforces the introduction of new control systems for the operation of a powered roof support. The most important stage when creating a new control system for a powered longwall system is to determine the time dependencies between the setting off of the function and its actual implementation by the control elements of the control system. Electro hydraulic control of the powered roof support has a number of advantages as compared to the manually operated distributor blocks. The most important are: higher supply pressure, reduction of the amount of force needed to override the support, the ability to adjust the power parameters to absorbency of the support’s actuators and their number, modular construction of control and executive dividers allowing customization construction of electro hydraulic control units and requirements resulting from the construction of the section. The presented research is focused on the analysis of time relations between the setting off of the control function and its actual implementation. This is the time from the moment of supplying power to the solenoid valve until the solenoid valve is opened. This dependence is of extremely significant as it determines the effectiveness of the entire control system.

Automated reverse engineering control system model

2020 ◽  
pp. 39-43
Author(s):  
A. V. Vinnichenko ◽  
S. A. Nazarevich ◽  
I. R. Karpova
Keyword(s):  
Control System ◽  
Reverse Engineering ◽  
Flaw Detection ◽  
Production Capacity ◽  
Speed Up ◽  
Environmental Requirements ◽  
Traditional Technologies ◽  
The Moment ◽  
Control System Model ◽  
Favorable Conditions

The article deals with the task of simplifying the reverse design process by implementing three-point 3D scanning, which allows you to speed up the technological stages of reverse design to the moment of product manufacture, as well as simplify the procedure for defecating finished products and create favorable conditions for the implementation of the principles of unification. The model of the control system in this article refers to the structuring of elements of the technological organization of the process of creating 3D prototyping of existing copies created by the use of reverse engineering. For this purpose, the problems of traditional technologies that do not allow timely coping with changes in the technical system under the influence of in accordance with the requirements of regulatory documents and environmental requirements were considered. We also analyzed not only the principles of operation of traditional technologies, but also the zone of reverse engineering, which allows you to achieve an increased level of production capacity by identifying a group of key defects based on the process of flaw detection and statistical analysis.

Synergetic control of permanent magnet synchronous motor based on load torque observer

2018 ◽  
Vol 233 (8) ◽  
pp. 980-993 ◽  
Author(s):  
Tao Wang ◽  
Jikun Li ◽  
Yuwen Liu
Keyword(s):  
Control Theory ◽  
Permanent Magnet ◽  
High Efficiency ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Moment Of Inertia ◽  
Load Torque ◽  
Synergetic Control ◽  
The Moment

The control of permanent magnet synchronous motor has become an important research, and many control methods have been developed because of its high efficiency and energy-saving characteristics. This article proposes a new motor control approach based on synergetic approach in control theory (SACT) and sliding-mode control (SMC). Since the load torque of the motor will change, the moment of inertia will increase in the experiment. The load torque is estimated by the sliding-mode observer. The moment of inertia is calculated by the least squares method by adding a forgetting factor. The practical application of synergetic control theory broadens the train of thought to meet the demand of high-performance motor drive further. The simulation and experimental results show that this control scheme in this article can improve the transient response and system robustness of dynamic systems.

scholarly journals A Cotton High-Efficiency Water-Fertilizer Control System Using Wireless Sensor Network for Precision Agriculture

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1693
Author(s):  
Chanchan Du ◽  
Lixin Zhang ◽  
Xiao Ma ◽  
Xiaokang Lou ◽  
Yongchao Shan ◽  
...  
Keyword(s):  
Control System ◽  
Decision Support ◽  
Wireless Sensor Network ◽  
Decision Support System ◽  
Sensor Network ◽  
Support System ◽  
Precision Agriculture ◽  
High Efficiency ◽  
Wireless Sensor ◽  
Sensors And Actuators

Scientific researchers have applied newly developed technologies, such as sensors and actuators, to different fields, including environmental monitoring, traffic management, and precision agriculture. Using agricultural technology to assist crop fertilization is an important research innovation that can not only reduce the workload of farmers, but also reduce resource waste and soil pollution. This paper describes the design and development of a water-fertilizer control system based on the soil conductivity threshold. The system uses a low-cost wireless sensor network as a data collection and transmission tool and transmits the data to the decision support system. The decision support system considers the change in soil electrical conductivity (EC) and moisture content to guide the application of water-fertilizer, and then improves the fertilization accuracy of the water-fertilizer control system. In the experiment, the proposed water-fertilizer control system was tested, and it was concluded that, compared with the existing traditional water-fertilizer integration control system, the amount of fertilizer used by the system was reduced by 10.89% on average, and it could save 0.76–0.87 tons of fertilizer throughout the whole growth period of cotton.

scholarly journals Structural-and-Parametric Optimization of Automatic Control System for Power Units of 300 MW in Wide Range of Load Variations

2019 ◽  
Vol 62 (5) ◽  
pp. 469-481 ◽  
Author(s):  
K. I. Artsiomenka
Keyword(s):  
Control System ◽  
Power Plant ◽  
Automatic Control ◽  
Automatic Control System ◽  
Power Plants ◽  
Parametric Optimization ◽  
Load Curve ◽  
Basic Part ◽  
Daily Schedule ◽  
Electric Loads

The structural-parametric optimization of the automatic control system for power units (ACSPU) of 300 MW of Lukoml’skaya GRES (Lukoml Local Condensing Power Plant) in the mode of both the permanent and the variable superheated steam pressure upstream of the turbine is under consideration. During 1974–1979, eight units of the Lukoml’skaya GRES implemented the ACSPU with a leading boiler power control. At the moment, these systems no longer meet all the frequency control quality requirements. In 2016, the daily schedule of electric loads of the Belarusian power system was as follows: the basic part of the schedule of electric loads was covered by combined heat and power plants (CHP) and by mini-CHP (which are the least maneuverable of the power plants), the semi-peak part of it–by local condensing power plants (Lukoml’skaya GRES and Berezovskaya GRES), the peak part–by import electric energy from neighboring power systems. However, this year the first unit of the Belorussian NPP will be put into operation, while the second one–in 2020. After the launch of the Belorussian NPP, it will cover basic part of load curve; CPPs will cover the semi-peak part, while the peak part of load curve will be covered by local condensing power plants. Correspondingly, due to the alteration of the structure of daily schedule of electric loads of the Belarusian power system, it is necessary to improve the efficiency of power units of Lukoml’skaya GRES as well as of the entire Lukoml’skaya GRES in general. This can be achieved with the help of the method of parametric optimization of the typical ACSPU proposed in the present paper. As a result, the quality of control of power and pressure upstream of the turbine will be improved; the flow of fuel will be reduced, as well as the turbine regulation valve displacement; environmental performance of entire power plant will be improved, too. The proposed technique has been confirmed by the results of computer simulation of transient processes in the automatic control system under external and internal disturbances.

Applied Technology in Intelligent Home Furnishing Control System in Internet of Things Based on SCM Microcontroller and GSM

2014 ◽  
Vol 540 ◽  
pp. 372-375 ◽  
Author(s):  
Jin Song Yuan ◽  
Jian Zhang ◽  
Yi Wang
Keyword(s):  
Control System ◽  
Internet Of Things ◽  
Information Acquisition ◽  
Main Function ◽  
Software Debugging ◽  
Intelligent Home ◽  
The Family ◽  
Applied Technology ◽  
Basic Functions ◽  
Home Furnishing

Main function of the intelligent home control system in internet of things is including the family equipment automatic control and home security. The applied technology of STC89C52 chip and the GSM module of TC35 modem are as the control core, temperature, humidity sensor for environmental information acquisition source, to create a smart Home Furnishing system. The applied technology content of experimental prototype includes the design of the system hardware and software debugging and controlling the writing and debugging. The results show that, the applied technology of circuit and software can finish the test basic functions.

Determination of tonal signal parameters based on zero crossing detection

2021 ◽  
Vol 263 (5) ◽  
pp. 1794-1803
Author(s):  
Michal Luczynski ◽  
Stefan Brachmanski ◽  
Andrzej Dobrucki
Keyword(s):  
High Efficiency ◽  
Detection Algorithm ◽  
Sine Wave ◽  
Time Interval ◽  
Zero Crossing ◽  
Tonal Signal ◽  
Zero Crossings ◽  
Tonal Component ◽  
Signal Parameters ◽  
The Moment

This paper presents a method for identifying tonal signal parameters using zero crossing detection. The signal parameters: frequency, amplitude and phase can change slowly in time. The described method allows to obtain accurate detection using possibly small number of signal samples. The detection algorithm consists of the following steps: frequency filtering, zero crossing detection and parameter reading. Filtering of the input signal is aimed at obtaining a signal consisting of a single tonal component. Zero crossing detection allows the elimination of multiple random zero crossings, which do not occur in a pure sine wave signal. The frequency is based on the frequency of transitions through zero, the amplitude is the largest value of the signal in the analysed time interval, and the initial phase is derived from the moment at which the transition through zero occurs. The obtained parameters were used to synthesise a compensation signal in an active tonal component reduction algorithm. The results of the algorithm confirmed the high efficiency of the method.

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