基于数字孪生的矿井辅助运输机器人动态调度策略

Dynamic scheduling strategy of mine auxiliary transportation robot based on digital twin

  • 摘要: 矿井辅助运输物资调度是煤矿安全高效生产的重要环节。煤矿运输环境复杂、事故多发、物资需求分布广泛,主要依靠人工排班,车辆调度难度大、信息透明程度低,已成为煤矿智能化建设的重要方向。随着辅助运输机器人的研发与应用,物资配送逐步实现连续运输,正朝智能调度方向推进。针对矿井辅助运输物资调度问题,将其映射为自动化码头水平运输,提出一种基于数字孪生的辅助运输机器人集中式动态调度方法。以辅助运输机器人最大运输时间最小和运行路径无冲突为目标,考虑机器人续航、载荷、故障等约束,建立任务均衡分配与路径无冲突规划两阶段调度模型,并设计文化遗传算法和带时间窗的Dijkstra算法组成双层算法对模型进行求解。调度方案经孪生系统仿真验证后,由调度系统集中控制运输机器人与固定设备共同完成调度任务。以贵州某矿井实际辅助运输为研究背景,设计并开发辅助运输数字孪生系统,经虚实一致性验证后,对所提模型与算法进行仿真分析与试验测试。结果表明:辅助运输机器人动态调度策略能够合理分配调度任务,检测和消解机器人冲突,任务分配均衡率达到94.5%;分析订单数、车辆数、区段利用率等因素与运输机器人调度的关系,提高机器人利用率,优化井下资源配置;相比人工调度,动态调度策略规划的订单最大完工时间减少了34.4%、抗扰动稳定性达到了98.3%,机器人设备利用率达到92.79%,验证了所提模型与算法在规避井下机器人运行冲突与抗干扰调度的有效性,显著提高辅助运输机器人的调度效率。

     

    Abstract: Mine auxiliary transportation material scheduling is an important part of coal mine safety and efficient production. The transportation environment in coal mines is complex, accidents occur frequently, and the demand for materials is widely distributed. The transportation of materials mainly relies on manual shift scheduling, which is difficult to dispatch vehicles and has a low degree of information transparency. It has become an important direction for the intelligent construction of coal mines. With the research and application of auxiliary transportation robots, material distribution is gradually achieving continuous transportation and is moving towards intelligent dispatching. Aiming at the problem of auxiliary transportation material scheduling in mines, it is mapped to the horizontal transportation of automated terminals, and a centralized dynamic scheduling method for auxiliary transportation robots based on digital twins is proposed. To minimize the maximum transportation time of auxiliary transportation robots while ensuring conflict-free path planning, a two-stage scheduling model is proposed, which integrates balanced task allocation and addresses constraints such as robot endurance, load capacity, and potential malfunctions. A two-layer algorithm is designed by combining the cultural genetic algorithm with the Dijkstra algorithm incorporating time window constraints to solve the model. Once the generated dispatching plan is simulated and validated through a digital twin system, the dispatching system centrally controls the transportation robots and fixed equipment to collaboratively execute the transportation tasks. Based on the actual auxiliary transportation operations of a mine in Guizhou Province, a digital twin system for auxiliary transportation was designed and implemented. Following the verification of virtual-physical consistency, simulation analyses and experimental tests were conducted to evaluate the performance of the proposed model and algorithm. The results show that the dynamic scheduling strategy for auxiliary transportation robots can rationally allocate scheduling tasks, detect and resolve robot conflicts, and the task allocation balance rate reaches 94.5%. Analyze the relationship between factors such as the number of orders, the number of vehicles, and the utilization rate of sections and the dispatching of transportation robots, improve the utilization rate of robots, and optimize the allocation of underground resources; Analyze the relationship between factors such as the number of orders, the number of vehicles, and the utilization rate of sections and the dispatching of transportation robots, improve the utilization rate of robots, and optimize the allocation of underground resources; Compared with manual scheduling, the dynamic scheduling strategy reduced the maximum order completion time by 34.4%, achieved an anti-disturbance stability of 98.3%, and reached a robot equipment utilization rate of 92.79%. The proposed model and algorithm demonstrated their effectiveness in avoiding operational conflicts among underground robots and in implementing interference-resistant scheduling, thereby enhancing the scheduling efficiency of auxiliary transportation robots.

     

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