基于数字孪生的煤矿掘进机器人纠偏控制研究

针对复杂巷道环境下掘进机器人自主纠偏控制难题,通过分析掘进机器人偏移原因,明确了掘进机器人纠偏控制功能需求,提出了一种基于数字孪生的煤矿掘进机器人纠偏控制系统,介绍了系统组成;以掘进机器人对中纠偏为例,分析了系统纠偏控制机理,提出了基于双目视觉图像信息的掘进机器人纠偏控制方法,以双目视觉检测的巷道图像为基础数据,通过提取巷道图像特征及分析巷道坐标系与掘进机器人坐标系关系,解算出掘进机器人相对于巷道空间的位姿参数,根据解算结果对掘进机器人进行纠偏控制;构建了掘进机器人及巷道数字模型和定位定向参数数据库,通过虚实映射关系,实现了掘进机器人虚拟远程纠偏控制。实验结果表明,基于数字孪生的煤矿掘进机器人纠偏控制系统在不同工况下均可有效补偿掘进机器人偏航角和偏移距离,纠偏过程可实时显示在监测监控界面,且纠偏路径规划仿真结果与实际工况一致。

基于Unity3D与多源数据融合的机器人可视化监控方法研究

为满足工业机器人数字化转型和安全生产的急切需求,通过总结工业机器人智能监控现状,以UR10机器人为研究对象,从孪生建模、多源数据融合、数据可视化等方面入手,引入数字孪生虚拟映射方法,搭建虚实交互层,构建三维可视化监控数字孪生框架;结合机器人运动学,构建机器人数学模型,基于数字孪生五维模型通过Unity3D平台开发了工业机器人的三维可视化监控系统;通过可靠性分析对机器人可视化监控系统进行分析;最后试验验证了该系统的可行性,为工业机器人数字孪生监控系统的开发提供了理论基础。

基于Unity3D的油田抽油机三维可视化监控系统设计

针对抽油机监测形式单一、三维可视化程度低和联动性差的缺陷,引入信息―物理实时映射思想,开发了油田抽油机三维可视化监控系统。设计了抽油机数字空间,搭建虚实交互层设计架构;搭建三维可视化系统数据组成及关系框架;结合逆运动学,构建数学模型,基于五维模型和Unity 3D平台设计抽油机三维可视化系统总体架构;以游梁式抽油机为对象进行实验验证,实现了实时动态监测、虚实混合控制、运动轨迹追踪和在线预警等服务功能。为三维可视化监控在石油机械领域的落地应用和数字孪生系统的开发提供借鉴。

智能制造虚拟仿真产教融合实训基地建设研究

虚拟仿真产教融合实训基地通过三维数字化建模技术、unity3D技、5G技术,结合生产现场真实设备及虚拟环境,“数字孪生”智能制造产线真实场景,建设以实带虚,以虚助实,虚实结合的虚拟仿真实训系统,实现虚实同步化运行动作并生成运行状态信息,具备远程双向控制功能,打造形神具备的智能制造产线数字孪生环境,面向职业院校培养智能制造产业高技术技能人才。

Virtual Reality Simulation of Fuzzy-logic Control during Underwater Dynamic Positioning

In this paper, graphical-user-interface （GUI） software for simulation and fuzzy-logic control of a remotely operated vehicle （ROV） using MATLABTM GUI Designing Environment is proposed. The proposed ROV＇s GUI platform allows the controller such as fuzzy-logic control systems design to be compared with other controllers such as proportional-integral-derivative （PID） and sliding-mode controller （SMC） systematically and interactively. External disturbance such as sea current can he added to improve the modelling in actual underwater environment. The simulated results showed the position responses of the fuzzy-logic control exhibit reasonable performance under the sea current disturbance.

Design and passive analysis of a novel softness display device

Simulating the softness property of object is quite a challenge in virtual reality system. A novel softness display system was developed based on the principle of deformable length of elastic element control （DLEEC）. In the system, the equivalent stiffness of the device is adjustable, and is inversely proportional to the third power of the deformable length of elastic beam. PD position control is employed to guarantee the accurate softness display. The softness of the virtual objects in large scale can be felt with the softness display device. Compared with other haptic devices, the device is passive and exert the react force only when the operator ＂actively touch＂ the virtual objects. The stability of the softness display system was analyzed. It was theoretical proved that the system satisfied the criteria of wide impedance range ＂Z-width＂, and the performance was superior to an active system. The experimental results were presented.

Control of Water Supply in Pipe Networks Nonlinear Case

The paper deals with control of supply in pipe networks based on so-called Dynamic Virtual Distortion Method. Making use of the analytical network model of this installation and using presented below, the so-called Virtual Distortion Method （VDM）, the control of water supply can be performed. Minimization of supply pressure in inlets to the network, subject to inequality constraints imposed on outlet pressure （in chosen nodes） is discussed. Taking advantage of pre-computed influence vectors, the real-time control strategy can be realised with small computational effort and therefore, can be managed with use of hardware-based controllers. Non-linear constitutive relation （water flow vs. pressure head） has been assumed.

数字孪生驱动的带式输送机自移机尾远程监控技术

针对煤矿井下带式输送机自移机尾推进过程中存在智能化水平低、推进质量差以及状态监测困难等问题,开展了基于数字孪生技术的煤矿井下带式输送机自移机尾远程监控技术研究。首先,通过研究自移机尾在数字孪生五维模型上的应用,提出了自移机尾数字孪生监控系统总体方案;其次,对设备机身和推移油缸进行姿态分析,在Unity3D中实现自移机尾的运动仿真;最后,建立自移机尾虚拟模型与远程控制界面,实现物理设备和虚拟模型的人机交互与协同。试验结果表明,自移机尾可在所构建的基于数字孪生技术的系统驱动下稳定迈步前移,设备运动状态可以在虚拟远程监控界面准确呈现,设备推进过程中的虚拟模型运动轨迹与物理设备的实际运动轨迹重合度达97.74%。研究结果可为智能矿山的远程监控技术发展提供借鉴。