Results 21 to 30 of about 9,481,871 (303)
Actuators, 2023 At present, the positioning control of the hydraulic support pushing systems in fully mechanized mining faces uses an electrohydraulic directional valve as the control component, while the current research mainly focuses on servo valves, proportional ...
Tengyan Hou +5 more
semanticscholar +1 more source
Positioning Control Strategy of Hydraulic Support Pushing System in Fully Mechanized Coal Face
Electronics, 2023 At present, the hydraulic support pushing system in coal mines usually uses an electrohydraulic directional valve as the control component. However, the existing control methods based on high-speed on–off valve, servo, and proportional control methods ...
Tengyan Hou +5 more
semanticscholar +1 more source
Robust Output Feedback Position Control of Hydraulic Support with Neural Network Compensator
Actuators, 2023 Hydraulic support is important equipment in the fully mechanized mining face, and the control performance of the hydraulic support multi-cylinder system directly affects the smooth progress of coal mining process, which is the basis for the continuous ...
Haigang Ding, Yunfei Wang, He Zhang
semanticscholar +1 more source
Research on principle of supporting status classification and sensing of hydraulic support
Gong-kuang zidonghua, 2020 Aiming at problem that single attitude measurement of hydraulic support can not fully reflect comprehensive state of hydraulic support, and can not realize accurate perception of supporting state of hydraulic support, taking two column shield hydraulic ...
ZHANG Desheng +5 more
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Gong-kuang zidonghua, 2023 The intelligence of fully mechanized working face is a key link in the intelligence of coal mines. The perception and analysis of hydraulic support state is the premise and foundation of intelligent control of fully mechanized working face.
LI Jian, REN Huaiwei, GONG Shixin
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Design of high cutting chock type hydraulic support
Gong-kuang zidonghua, 2017 In view of problems of poor support effect, slow support speed, high support cost and great labor intensity of advance support with advanced hydraulic support, single hydraulic prop or timber in return airway of fully-mechanized high cutting coal mining ...
CAO Lianmin +5 more
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Gong-kuang zidonghua, 2021 The hydraulic support automatic follow-up control should have the performance of high support, fast support moving, large moving distance, etc. Among these performance, under the premise of ensuring stope safety, shortening the time of working face empty
ZHOU Rulin, QIAO Zishi, MENG Lingyu
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Intelligent cooperative control of hydraulic support inspired by driveless car
Gong-kuang zidonghua, 2020 For problems such as low control accuracy, poor coordination and uneven pushing of hydraulic support in fully-mechanized coal mining face, an intelligent cooperative control method of hydraulic support is proposed based on driverless car technology ...
NIU Jianfeng
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Shock and Vibration, 2022 In order to comprehensively analyze the adaptability of four-leg hydraulic support with large mining height under impact dynamic load, this paper adopts HyperMesh software to conduct a flexible pretreatment for the top beam, shield beam, and front and ...
Dalong Wang +3 more
semanticscholar +1 more source
Frontiers in Earth Science, 2022 Aiming at the mining disaster of a thick hard roof, based on the analysis of the mining instability influence of the thick hard roof, this study constructs the mining bearing mechanical model of the thick hard roof by using mechanical theory and obtains ...
Qingwei Bu +4 more
semanticscholar +1 more source