scholarly journals Studies of behaviour of the automatic control system of roadheader cutting heads movement

2019 ◽  
Vol 252 ◽  
pp. 09002 ◽  
Author(s):  
Piotr Cheluszka ◽  
Piotr Sobota ◽  
Grzegorz Głuszek
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Frequency Converter ◽  
Angular Speed ◽  
Underground Mines ◽  
System Parameters ◽  
Programming Device ◽  
Innovative Solution ◽  
Control Purpose

Boom–type roadheaders are basic machines used in underground mines for drilling roadways, in tunnelling and also for making underground buildings using trenchless methods. The article presents selected results of tests carried out in a semi–industrial scale, on a roadheader R–130, concerning behaviour of an innovative solution of system for automatic control of boom–type roadheader cutting heads’ movements. This important innovation, not known before in mining cutting machines, is the software control of cutting heads angular speed using a frequency converter. The text shows an impact of key values, from a perspective of an assumed control purpose, of programming device (setting system) parameters, achieving reference values for the actuators, on controlled facility behaviour when cutting a layered cement and sand block. The performance of the automatic control system without and with feedback to the setting system concerning an actual speed of cutting heads movement, which is important from the control system hardware perspective, was compared.

scholarly journals Investigation of the possibility of regulation and automatic optimization of the control system of a chamber grain dryer

2021 ◽  
Vol 4 (46) ◽  
pp. 6-6
Author(s):  
Alexander Saakian ◽  
◽  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Energy Saving ◽  
Automatic Control System ◽  
Frequency Converter ◽  
Heat Energy ◽  
Convective Drying ◽  
Control Temperature ◽  
Temperature Controller ◽  
Automatic Optimization

The regulation of the coolant speed during convective drying in a stationary grain layer allows the maximum use of the amount of heat energy for drying the material. The paper presents the results of a study of the regulation of the coolant speed on an experimental drying plant for use in the automatic control system of a chamber grain dryer. The article also discusses the issues of energy saving efficiency in drying chambers. The possibility of automatic control of the main parameters control system using a microcontroller is analyzed. Keywords: DRYING MODES, DRYING ZONE, AUTOMATIC CONTROL, TEMPERATURE CONTROLLER, FAN, OPTIMIZATION, MICROCONTROLLER, FREQUENCY CONVERTER

scholarly journals Optimization of the Cutting Process Parameters to Ensure High Efficiency of Drilling Tunnels and Use the Technical Potential of the Boom-Type Roadheader

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6597
Author(s):  
Piotr Cheluszka
Keyword(s):  
Control System ◽  
Energy Consumption ◽  
Automatic Control ◽  
Automatic Control System ◽  
Process Parameters ◽  
High Efficiency ◽  
Rock Cutting ◽  
High Energy ◽  
Cutting Process ◽  
Underground Mines

This paper deals with the automation of the rock cutting process with roadheaders used widely in civil engineering for drilling roadways in underground mines and tunnels. Although there has been intensive technical development, roadheaders are still manually controlled. Manual control does not allow optimizing the values of the cutting process parameters, which often results in low mining efficiency, especially in the case of hard rocks, as well as high energy consumption and significant dynamic overloading of the roadheader. As part of theoretical and experimental research, an automatic control system was designed for the boom-type roadheader and an algorithm was developed for the optimal control of the cutting process parameters. Control criteria have been formulated, based on which the current values of the cutting process parameters are worked out using the information on the dynamic load state of the roadheader. The paper presents selected results of numerical tests conducted on roadheader dynamics, which simulated the automatic control system operation of the heading face cutting process of drilled roadway or tunnel. These tests were intended to analyze the behavior of the investigated object during simulated rock cutting in automatic mode. The results confirmed the possibility of a significant reduction in mining energy consumption.

Automatic Control System of Stone Sawing Machine Based on PLC and Human-Computer Interface

2013 ◽  
Vol 278-280 ◽  
pp. 1417-1422
Author(s):  
Jin Lan Zhang ◽  
Qian Lv
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Frequency Converter ◽  
Cooling Water ◽  
Cutting Process ◽  
Machining Accuracy ◽  
Detection Frequency ◽  
Machine Interface ◽  
Stone Cutting

This paper designs a PLC automatic control system in stone cutting. The author elaborated the stone cutting process, the system hardware/software design and the human-machine interface design process. This system is the collection of PLC, sensing detection, frequency converter, configuration control technology and advanced stone cutting process in an organic whole. The author designed optional automatic/manual function and parameters setting screen. The author added limit current protection and position protection, and designed function of automatic detecting cooling water shortage to protect the saw blade from damage. Also the designed equipment can automatic light and bell for alarm. Operation results show that, this system can meet the designed requirement, and can remarkably improve the quality of stone processing. This designed control system has high machining accuracy, high intelligence, full automation, perfect protection, friendly man-machine interface and simple operation.

scholarly journals The method for automatic control of a ship with directional instability

2021 ◽  
Vol 2061 (1) ◽  
pp. 012084
Author(s):  
AI Kondratyev ◽  
I V Burylin ◽  
KP Mamaev ◽  
S V Skorokhodov
Keyword(s):  
Kalman Filter ◽  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Wind Wave ◽  
Angular Acceleration ◽  
Angular Speed ◽  
Control Actions ◽  
Control Diagram ◽  
Simple Integration

Abstract A method for creating an automatic control system for a ship with directional instability has been developed. As part of the tests of a small-sized unmanned vessel, a control diagram was built. It showed that the vessel is unstable along its route. It became necessary to add a control channel for the angular acceleration of the vessel to the main channels of the PID regulator. The PID-U regulator has a significant advantage in controlling an unstable vessel on the route over a standard PID regulator due to the channel of angular acceleration; the regulator monitors the angular speed and compensates it with control actions. The disadvantage of the method is difficulties in finding the angular acceleration of the vessel, since, gyroscopic sensors installed on vessels provide data only on the route and angular speed. Simple integration of the angular speed to determine the acceleration can result in errors, especially in wind-wave conditions. The mathematical observer based on the Kalman filter can be used. The results of operation modeling forthis regulator are described.

scholarly journals Development and research of the invariant automatic control system of angular speed of diesel engine

2019 ◽  
Vol 5 (2 (101)) ◽  
pp. 51-56
Author(s):  
Andriy Uzhelovskyi ◽  
Mikhail Spilnik ◽  
Valentyn Uzhelovskyi ◽  
Maxim Shaptala ◽  
Halyna Kravec ◽  
...  
Keyword(s):  
Control System ◽  
Diesel Engine ◽  
Automatic Control ◽  
Automatic Control System ◽  
Angular Speed

Parametric optimization of a marine DC motor rotational speed automatic control system

2021 ◽  
Vol 4 ◽  
pp. 22-30
Author(s):  
Aleksandr Bordug ◽  
Aleksandr Zheleznyak
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Time Constant ◽  
Automatic Control System ◽  
Rotational Speed ◽  
Parametric Optimization ◽  
Dc Motor ◽  
Process Time ◽  
Motor Speed ◽  
System Parameters

DC motor speed control can be done either manually or by using an automatic controlling tool. In order to perform parametric optimization of a DC motor rotational speed automatic control system, we have developed a simplified methodology. The said methodology is able to obtain a transfer function for an automatic control system being based on several initially given system parameters. It is a tree-step way according to the research goals. We offer model patterns where parameters can be designated. Time constant for a PI controller is being presented by a process time constant for a controlled DC motor for the purpose of this particular research.

Investigation of the stability of periodic motions in a nonlinear automatic control system based on the fast fourier transform

2003 ◽  
Vol 3 ◽  
pp. 297-307
Author(s):  
V.V. Denisov
Keyword(s):  
Fourier Transform ◽  
Control System ◽  
Automatic Control ◽  
Fast Fourier Transform ◽  
Automatic Control System ◽  
Resonance Phenomenon ◽  
Periodic Motions ◽  
Multiply Connected ◽  
Non Linear ◽  
The Stability

An approach to the study of the stability of non-linear multiply connected systems of automatic control by means of a fast Fourier transform and the resonance phenomenon is considered.

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