Automatic control of operating conditions in the annealing lehr of a thermally polished glass line

1997 ◽  
Vol 54 (7-8) ◽  
pp. 199-201
Author(s):  
V. I. Kondrashov ◽  
Yu. N. Pentkov ◽  
L. G. Kopchekchi ◽  
F. B. Novikov
Keyword(s):  
Automatic Control ◽  
Polished Glass ◽  
Operating Conditions

scholarly journals A Step-by-Step Procedure for Tests and Assessment of the Automatic Operation of a Powered Roof Support

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 697
Author(s):  
Dawid Szurgacz ◽  
Sergey Zhironkin ◽  
Michal Cehlár ◽  
Stefan Vöth ◽  
Sam Spearing ◽  
...  
Keyword(s):  
Automatic Control ◽  
Occupational Safety ◽  
Longwall Mining ◽  
Mining Operation ◽  
Primary Objective ◽  
Operating Conditions ◽  
Mining System ◽  
Step Procedure ◽  
Roof Rocks ◽  
Roof Support

A powered longwall mining system comprises three basic machines: a shearer, a scraper (longwall) conveyor, and a powered roof support. The powered roof support as a component of a longwall complex has two functions. It protects the working from roof rocks that fall to the area where the machines and people work and transports the machines and devices in the longwall as the mining operation proceeds further into the seam by means of hydraulic actuators that are adequately connected to the powered support. The actuators are controlled by a hydraulic or electro-hydraulic system. The tests and analyses presented in the developed procedure are oriented towards the possibility of introducing automatic control, without the participation of an operator. This is important for the exploitation of seams that are deposited at great depths. The primary objective was to develop a comprehensive methodology for testing and evaluating the possibility of using the system under operating conditions. The conclusions based on the analysis presented are a valuable source of information for the designers in terms of increasing the efficiency of the operation of the system and improving occupational safety. The authors have proposed a procedure for testing and evaluation to introduce an automatic control system into the operating conditions. The procedure combines four areas. Tests and analyses were carried out in order to determine the extent to which the system could be potentially used in the future. The presented solution includes certification and executive documentation.

scholarly journals Configuring adaptive PID-controllers of the automatic speed control system of the GTE

2020 ◽  
Vol 8 (6) ◽  
pp. 143-156
Author(s):  
K. E. Chertilin ◽  
V. D. Ivchenko
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Gas Turbine ◽  
Adaptive Systems ◽  
Fuzzy Controller ◽  
Operating Conditions ◽  
Rule Base ◽  
Adaptation Algorithm ◽  
Automatic Control Systems

For non-stationary objects with parameters, which could be changed significantly during operation, using conventional controllers in the form of proportional-integraldifferential regulators may not provide the required quality of the system. Therefore, it is desirable to create an adaptive automatic control system with the structure and parameters of the control regulator that are purposefully changed to ensure the system adaptation, that is based on information about the properties of the object of regulation and external influences, to the changing operating conditions. The problem of designing adaptive systems is one of the most important in control theory and related fields. This is conditioned by two factors: the complexity of solving the problem as a whole and the presence of a large number of technically diverse situations that need to be adapted and optimized. In the paper, an adaptive system for the automatic control of the speed of a gas turbine engine, which includes a magnetic amplifier, a DC motor with a gearbox, a fuel supply valve and a tachogenerator, is developed. For adaptive control execution, three proportional-integral-differential controllers were proposed: "classic", fuzzy and neurofuzzy. The parameters of the "classic" controller were optimized using linear programming methods. The membership functions and the rule base were proposed for the fuzzy controller. An adaptation algorithm was selected for the neuro-fuzzy controller. Three controllers were used for three engine-operating modes: low-gas, cruiser and maximum during the computer simulation of the system. A comparative analysis of the quality of the three regulators was performed and it is based on the obtained transient characteristics. The derived results can be used in the development of automatic control systems for gas turbine engines.

scholarly journals Improving the efficiency of heading and winning machines for potash ore extraction based on their drive load data

2021 ◽  
Vol 1 (3) ◽  
pp. 97-105
Author(s):  
Dmitrii I. Shishliannikov ◽  
Mikhail G. Trifanov
Keyword(s):  
Rock Mass ◽  
Automatic Control ◽  
Control Systems ◽  
Cutting Tools ◽  
Cutting Parameters ◽  
Operating Conditions ◽  
Mass Destruction ◽  
Automatic Control Systems ◽  
Drive Control ◽  
Disc Cutting

Introduction. The article considers the substantiation of rational parameters of potash rock mass fragmentation by the planetary disk cutting tools of heading and winning machines. The implementation of automatic planetary tool drives control systems is regarded as promising. The automatic drive control system allows maintaining the parameters of potash mass destruction in the ranges of rational values. ISSN 0536-1028 «Известия вузов. Горный журнал», № 3, 2021 105 Research methodology. The parameters of potash rock mass destruction by the cutters of planetary-disk cutting tools in modern combines “Ural-20R” were calculated. It was revealed that at a productivity of 7 t/min, the main cutting tools destroy the massif with a small cutting spacing. The small cutting pitch is the reason for the increased yield of unmanageable classes in the mined ore. Results. A method is proposed for automatic control of the “Ural” combine planetary tool cutting discs translational rotational speed. This method will make it possible to destroy the potash mass with rational cutting parameters, based on drive load data. Findings. The proposed technical solutions will increase the efficiency of potash ore mining by the heading and winning machines. Automatic control systems for planetary disc cutting tools operating based on drive load data will increase the adaptability and energy efficiency of the heading and winning machines under actual operating conditions.

Sensitivity investigations of the automated lane-change manoeuvre – selected issues

2018 ◽  
Vol 233 (4) ◽  
pp. 360-369
Author(s):  
Mirosław Gidlewski ◽  
Leszek Jemioł ◽  
Dariusz Żardecki
Keyword(s):  
Automatic Control ◽  
Point Of View ◽  
Operating Conditions ◽  
Virtual Object ◽  
Lane Change ◽  
Theoretical Point ◽  
Detailed Model ◽  
Active Steering ◽  
Bicycle Model ◽  
Object Of Control

This article presents fragments of authors’ research works regarding the automation of the process of lane-change manoeuvre by a car. The mathematical model of the conceptual automatic control system was elaborated on the basis of the simplified ‘bicycle model’ of a car’s lateral dynamics. From a theoretical point of view, the controller’s algorithm seems to be very efficient but of course it requires testing with a car in many operating conditions. Such investigations could be carried out using a very detailed model of the vehicle’s motion treated as a virtual object of control. The purpose of extensive simulation investigations was to check the controller’s operation and evaluate its sensitivity to changes in the vehicle and road parameters. This article presents unpublished results of studies on the sensitivity of errors in measured signals. In simulation-based sensitivity investigations, special sensitivity indexes support this analysis. The analysis provides more reliable conclusions about the performance of the controller and shows the required accuracy of the measured signals. The article presents information on the models, the method used and the sample research results. The presented method of automatic control and its testing method can be an attractive proposition for designers and researchers of active steering systems that enhance the active safety of vehicles.

scholarly journals INVESTIGATION OF THE THERMOPHYSICAL CHARACTERISTICS OF MINERALS AT VARIOUS HEATING PARAMETERS

2021 ◽  
Vol 18 (1) ◽  
pp. 70-74
Author(s):  
K.M. Shaimerdenova ◽  
Keyword(s):  
Heat Capacity ◽  
Automatic Control ◽  
Three Dimensional ◽  
Practical Interest ◽  
Operating Conditions ◽  
Experimental Results ◽  
Gas Flows ◽  
Thermophysical Characteristics ◽  
Insulating Materials ◽  
Natural Minerals

The study of natural minerals in the production of heat and electrical insulating materials is of particular practical interest for the study of their thermophysical characteristics. The regularities of changes in the heat capacity of minerals when heated in production and operating conditions are of particular interest. Natural minerals of wollastonite and quartz were considered as the object of research. The heat capacity of these minerals was measured in an apparatus with a three-dimensional sensor and a panel for automatic control of gas flows, when heated to the temperature of 1600ºС by the calorimetric method. Based on the experimental results, graphs of the dependence of the heat capacity of mineral samples on temperature were constructed.

scholarly journals DESIGN, CONSTRUCTION AND AUTOMATIC CONTROL SYSTEM OF SINGLE-STAGE SIX-BED ADSORPTION HEAT PUMP

2019 ◽  
Vol 9 (4) ◽  
pp. 93-98
Author(s):  
Katarzyna Zwarycz-Makles ◽  
Sławomir Jaszczak
Keyword(s):  
Automatic Control ◽  
Heat Pump ◽  
Cooling Water ◽  
Sorption Process ◽  
Operating Conditions ◽  
Single Stage ◽  
Adsorption Heat ◽  
Heating And Cooling ◽  
Adsorption Heat Pump ◽  
Wide Range

The construction and automatic control of single-stage six-bed adsorption heat pump for heating and cooling purposes is discussed. The presented device is design to simulate operating conditions as well as temperature and uptake changes in the adsorbers/desorbers and consequently to describe the performance of the six–bed adsorption heat pump. The authors focus on advanced operation and strategy of multi-bed heat pump adsorber/desorber performance configuration. Through the use of a sequential system of sorption columns operation, the continuous character of the gained power of device in a wide range is obtained. It is possible as a result of using in the device the quantitative control of the pump by switching sequentially columns (sequential control), quality control by changing the temperature of heating/cooling water flowing in series or parallel through sorption columns and by changing the time parameter of sorption process (adsorption/desorption time) of the bed.

A system of measurement and automatic control of tunnel kiln operating conditions

Refractories ◽  
1986 ◽  
Vol 27 (7-8) ◽  
pp. 406-410
Author(s):  
Yu. A. Levchenko ◽  
M. Z. Shvartsman ◽  
N. B. Gertsyk ◽  
V. V. Strekotin ◽  
N. A. Tyutin ◽  
...  
Keyword(s):  
Automatic Control ◽  
Tunnel Kiln ◽  
Operating Conditions

Cathodoluminescence of Catalyst Crystallites

1982 ◽  
Vol 40 ◽  
pp. 664-665
Author(s):  
E.D. Boyes ◽  
P.L. Gai ◽  
D.B. Darby ◽  
C. Warwick
Keyword(s):  
Defect Density ◽  
Chemical Properties ◽  
Operating Conditions ◽  
Semiconductor Materials ◽  
Environmental Cell ◽  
High Resolution Structure ◽  
Commercially Important ◽  
Crystallographic Defects ◽  
Resolution Structure

The extended crystallographic defects introduced into some oxide catalysts under operating conditions may be a consequence and accommodation of the changes produced by the catalytic activity, rather than always being the origin of the reactivity. Operation without such defects has been established for the commercially important tellurium molybdate system. in addition it is clear that the point defect density and the electronic structure can both have a significant influence on the chemical properties and hence on the effectiveness (activity and selectivity) of the material as a catalyst. SEM/probe techniques more commonly applied to semiconductor materials, have been investigated to supplement the information obtained from in-situ environmental cell HVEM, ultra-high resolution structure imaging and more conventional AEM and EPMA chemical microanalysis.

Comparison of Deterministic and Linear Cosine Spatial Filtering of Transmission Electron Micrographs

1972 ◽  
Vol 30 ◽  
pp. 596-597
Author(s):  
David A. Ansley
Keyword(s):  
Spherical Aberration ◽  
Focal Length ◽  
Chromatic Aberration ◽  
Spatial Filter ◽  
Operating Conditions ◽  
Objective Lens ◽  
List Type ◽  
Spatial Filters ◽  
Transmission Electron ◽  
Wide Range

The coherence of the electron flux of a transmission electron microscope (TEM) limits the direct application of deconvolution techniques which have been used successfully on unmanned spacecraft programs. The theory assumes noncoherent illumination. Deconvolution of a TEM micrograph will, therefore, in general produce spurious detail rather than improved resolution.A primary goal of our research is to study the performance of several types of linear spatial filters as a function of specimen contrast, phase, and coherence. We have, therefore, developed a one-dimensional analysis and plotting program to simulate a wide 'range of operating conditions of the TEM, including adjustment of the:(1) Specimen amplitude, phase, and separation(2) Illumination wavelength, half-angle, and tilt(3) Objective lens focal length and aperture width(4) Spherical aberration, defocus, and chromatic aberration focus shift(5) Detector gamma, additive, and multiplicative noise constants(6) Type of spatial filter: linear cosine, linear sine, or deterministic

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