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 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.

Automatic Control System for the Process Parameters of the Soakage Agent in Glass Fiber Production

2011 ◽  
Vol 383-390 ◽  
pp. 4246-4250
Author(s):  
Mu Cheng Zhu ◽  
Shi Liang Nie ◽  
Ya Ping Wang ◽  
Yong Jiang ◽  
Jiong Guo
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Glass Fiber ◽  
Real Time ◽  
Automatic Control System ◽  
Process Parameters ◽  
Fiber Quality ◽  
Level Control ◽  
Fiber Production ◽  
The Stability

Soakage agent in glass fiber production is critically, the stability of its quality is directly related to the stability of the glass fiber quality. According to the characteristics of the soakage glass in fiber agent production process, this paper is mainly introduced the multi-sensor information collection for the soakage agent process parameters, and is proposed to use PLC programming, PID control and fuzzy control harmony methods to achieve the real-time automatic control preparation process of the soakage agent in adding water of amount, adding oil of amount, temperature control, liquid level control, viscosity test and many other parameters . The practical application of the automatic control system is reliable, accurate, real time.

scholarly journals CONTROL AUTOMATION OF MARITIME UNMANNED COMPLEX WITH A GROUP OF AUTONOMOUS UNDERWATER VEHICLES

2019 ◽  
Vol 4 ◽  
pp. 54-62 ◽  
Author(s):  
Volodymyr Blintsov ◽  
Leo Tosin Aloba
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Autonomous Underwater Vehicles ◽  
High Energy ◽  
Underwater Vehicles ◽  
Marine Robotics ◽  
Unmanned Surface Vessel ◽  
Search Operation ◽  
Surface Vessel

It is expedient to perform underwater search operations on large water areas using a group of autonomous self-propelled underwater vehicles. However, with a large distance to the search areas, the sea transition (from one point to the other) of the underwater vehicles requires high energy costs. This leads to the necessity to use heavy-duty underwater vehicles, which determines the high cost of the search operation. The transport of underwater vehicles is proposed to be carried out with an unmanned surface vessel, equipped with actuators for the automatic release of a group of vehicles under water and receiving on board after the end of the underwater mission. The maritime unmanned complex consisting of an unmanned surface vessel and a group of autonomous underwater vehicles on its board forms a new type of marine robotics, the complete automation of which is an actual scientific and technical task. For its implementation, the underlying (basic) automation technology of the marine search underwater mission has been developed as the theoretical basis for the development of the generalized structure of the complex automatic control system. Ten implementation stages of the underlying technology are formulated and the analysis of their automation features with the use of modern methods in the field of marine robotics is performed. Automation of the underlying technology stages involves the transfer of the vessel to a given water area, the automatic release (launch) of the group of underwater vehicles and their coordinated motion to the search area, the search operations and the return to the unmanned surface vessel, as well as the recovery of the vessel to the base. The generalized requirements for automatic control systems constituting the maritime unmanned complex at each stage of its functioning are provided. The spiral trajectory of waiting for the motion of the underwater vehicles at the group formation stages, for the search operation execution and after its completion, is proposed. For the spatial motion of the autonomous underwater vehicle as an agent of the group, the automatic control system was improved by introducing the blocks of the “Navigation Situation Model” and the “Navigation Threat Identifier, which make it impossible for emergency collision with the neighboring underwater vehicles of the group and disintegrate the group due to the data communication loss between them.

Development of Automatic Control System for a Rolling Shear Line

2010 ◽  
Vol 145 ◽  
pp. 471-476
Author(s):  
Qian Lai Sun ◽  
Zhi Yi Sun ◽  
Xue Wen Yan ◽  
Hong Li
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
High Efficiency ◽  
Low Cost ◽  
Control Unit ◽  
Distributed Control System ◽  
Rolling Shear ◽  
Shear Line ◽  
Profibus Dp

An automatic control system is developed for a rolling shear line in this paper in order to overcome the weakness of the traditional control system. All of motion mechanisms are driven by alternating current motors. The S7-300 PLC is selected as the control unit. And the PROFIBUS-DP field bus is employed to structure a distributed control system. Automatic cutting to length is realized. The rolling shear line has some merits such as high efficiency and precision, low cost and energy consummation ensured by the control system. The control system is reliable and flexible.

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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