The research on the new boiler water level automatic control system

2011 ◽  
Author(s):  
Juyuan Jiang ◽  
Lijing Li
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Water Level ◽  
Automatic Control System ◽  
Boiler Water

Research of Mine Drainage Automatic Control System Based on PLC

2012 ◽  
Vol 619 ◽  
pp. 131-134
Author(s):  
Lan Zhu Ren ◽  
Xin Zhang ◽  
Ying Zhang ◽  
Li Liu
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Water Level ◽  
Automatic Control System ◽  
Mine Drainage ◽  
Frequency Control ◽  
Control Technology ◽  
Entire System ◽  
Economic Operation ◽  
Mine Automation

According to the development of mine automation requirements, Siemens S7-300 PLC is adopted in order to do the research of mine drainage automatic control system in this paper. Combined with frequency control technology, the system can schedule the pumps reasonably by monitoring water level and pressure signals. With failure alarm, group network communication and other functions, it’s profitable to achieve the whole mine automatic control and the economic operation of the entire system.

scholarly journals DESAIN AUTOMATIC CONTROL SYSTEM POMPA AIR TAWAR PADA KAPAL RAKYAT

2021 ◽  
Vol 4 ◽  
pp. 96-103
Author(s):  
Franky Tanahitumessing
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Water Level ◽  
Automatic Control System ◽  
Distribution System ◽  
Water Pump ◽  
Level Sensor ◽  
Water Pumps ◽  
Control Tool ◽  
Over Time

Freshwater supplies on people's ships are a vital need that must be met during the ship's voyage. The distribution system used without control will be troublesome for the Crew, who are always in charge of controlling the availability of water in the daily tank and running the water pump. Water pump control equipment is used to help reduce the working time of the Crew and can improve the performance efficiency of the water pump. A buoy switch is a control tool that is often used, but the buoy system will be disrupted over time. An automatic control system using a water level sensor is not familiar to use to control the water pump. From the design results of this system is more efficient than the buoy switch. Its efficiency can be seen from the degree of sensitivity to changes in water level, as well as longer service life. This system can be used to control the work of water pumps without supervision or control of the Crew, thus saving more time and the availability of water in the daily tank remains available at all times.

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.

scholarly journals Results of Laboratory Studies of the Automated Sorting System for Root and Onion Crops

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1257
Author(s):  
Alexey Dorokhov ◽  
Alexander Aksenov ◽  
Alexey Sibirev ◽  
Nikolay Sazonov ◽  
Maxim Mosyakov ◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Technological Parameters ◽  
Post Harvest ◽  
Manual Sorting ◽  
Sorting System ◽  
Working Bodies ◽  
Automatic Removal

The roller and sieve machines most commonly used in Russia for the post-harvest processing of root and tuber crops and onions have a number of disadvantages, the main one being a decrease in the quality of sorting due to the contamination of working bodies, which increases the quantity of losses during sorting and storage. To obtain high-quality competitive production, it is necessary to combine a number of technological operations during the sorting process, such as dividing the material into classes and fractions by quality and size, as well as identifying and removing damaged products. In order to improve the quality of sorting of root tubers and onions by size, it is necessary to ensure the development of an automatic control system for operating and technological parameters, the use of which will eliminate manual sorting on bulkhead tables in post-harvest processing. To fulfill these conditions, the developed automatic control system must have the ability to identify the material on the sorting surface, taking into account external damage and ensuring the automatic removal of impurities. In this study, the highest sorting accuracy of tubers (of more than 91%) was achieved with a forward speed of 1.2 m/s for the conveyor of the sorting table, with damage to 2.2% of the tubers, which meets the agrotechnical requirements for post-harvest processing. This feature distinguishes the developed device from similar ones.

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