Speed Simulation of Hydraulic Automatic Speed-Controlled Pipeline Inspection Gauge in Liquid Pipelines

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Qing Tu ◽  
Qingyou Liu ◽  
Shouhong Ji ◽  
Tao Ren ◽  
Yujia Li
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Numerical Method ◽  
Automatic Control System ◽  
Kinematic Model ◽  
Speed Control ◽  
Security Risk ◽  
Pipeline Inspection ◽  
Bypass Valve ◽  
Movement Mechanism

Abstract A pipeline inspection gauge (PIG) is an effective device for pipeline cleaning and inspection. Furthermore, a speed-controlled PIG can adjust speed by controlling the bypass valve. The conventional-speed controlled PIG uses batteries as an energy source to adjust the bypass valve. Battery power and other electronic equipment will limit running distance and cause a potential security risk. In this paper, a PIG with a hydraulic automatic control system is presented. The kinematic model of the PIG in the liquid pipeline is obtained by studying the hydraulic automatic control system and PIG movement mechanism with a bypass valve. A numerical method was used to solve the PIG's kinematic model. Through parameter sensitivity analysis, the influence law of each parameter on the entire system is obtained. The case study was conducted by a numerical method, which confirmed that the hydraulic automatically controlled PIG has speed control ability. Compared with a PIG without the speed control system, the hydraulic automatic speed-controlled PIG has better motion performance in the fluctuating pipeline.

scholarly journals The Analysis of the Digital AC Motor Speed Control System Operation

2018 ◽  
Vol 212 (1) ◽  
pp. 125-136
Author(s):  
Joanna Sznajder
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Characteristic Curve ◽  
Control Object ◽  
Speed Control ◽  
Alternate Current ◽  
Motor Speed ◽  
Step Method ◽  
Unit Step

Abstract The article presents the analysis of the automatic alternate current motor control system, carried out by the author. The automatic control system has been implemented on the existing laboratory stand, containing: the squirrel-cage asynchronous motor and the frequency inverter. The existing stand imposed one of the available speed control methods for the motor and the necessity of the appropriate elements selection for the automatic control system [1]. The automatic control system has been designed and created as the constant value follow-up digital controller. To designate the parameters of the control object the unit step method of was used. After registering the output changes caused by the unit step, the characteristic curve was received that allowed to determine the alternative transmittance of the control object which, in turn, has made possible to find the appropriate controller settings.

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.

scholarly journals Stability study of digital multi-connected automatic control system

2021 ◽  
Vol 1864 (1) ◽  
pp. 012039
Author(s):  
B. G. Ilyasov ◽  
G.A. Saitova ◽  
A.V. Elizarova
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Stability Study
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