Digital twin driven remote automatic cutting control technology of roadheader
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摘要: 目前掘进机远程截割控制方法大多基于视频监控与平面信息,巷道断面成形质量取决于人工操作经验,可靠性较低。针对该问题,研究了数字孪生驱动掘进机远程自动截割控制技术,从数据感知、数据驱动、数据传输、远程自动截割控制等方面介绍了数字孪生驱动掘进机自动截割的实现过程。采用视觉测量技术获取掘进机位姿数据、气体传感器等获取掘进环境数据,构成数字孪生驱动的数据来源;建立掘进机虚拟模型和虚拟场景并完成虚拟模型动作编程及虚拟模型与虚拟场景的耦合,通过求解掘进机运动学正逆解,实现掘进机与虚拟模型交互;基于三次多项式方法进行巷道断面“S”形截割轨迹规划,设计反馈线性积分滑模控制器实现截割轨迹跟踪控制;采用MySQL数据库作为数据交互媒介,通过井下工业以太环网及矿用5G技术实现数据远程传输。实验结果表明,掘进机截割头能稳定跟随规划轨迹,且同一时刻虚拟界面显示的掘进机截割头位姿与实际位姿一致。Abstract: Existing remote cutting control methods of roadheader are mostly based on video monitoring and planar information, and roadway section forming quality depends on manual operation experience with low reliability. For the above problems, digital twin driven remote automatic cutting control technology of roadheader was researched, and implementation process of digital twin driven automatic cutting of roadheader was introduced from aspects of data sensing, data driving, data transmission and remote automatic cutting control. Position and attitude data of roadheader is obtained by use of vision measurement technology and tunneling environment data is gathered by gas and other sensors, which form data source of data twin driving. Vitual model of roadheader and virtual scene are established, and action programming and coupling between the virtual model and virtual scene are finished. Interaction between roadheader and the virtual model is realized by normal and inverse kinematics of roadheader. "S" shape cutting trajectory of roadway section is planned based on cubic polynomial method, and linear integral feedback sliding mode controller is designed to control cutting trajectory. MySQL database is taken as medium of data interaction, and remote data transmission is realized through underground industrial ethernet ring network and mine-used 5G technology. The experimental results show that the cutting head of roadheader can stably follow the planed trajectory, and position and attitude of cutting head of roadheader in virtual interface is accordant with the actual ones at the same moment.
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