Poor road conditions in underground mine tunnels can lead to decreased production efficiency and increased wear on production vehicles. A prototype system for road condition monitoring is presented in this paper to co...Poor road conditions in underground mine tunnels can lead to decreased production efficiency and increased wear on production vehicles. A prototype system for road condition monitoring is presented in this paper to counteract this. The system consists of three components i.e. localization, road monitoring, and scheduling. The localization of vehicles is performed using a Rao-Blackwellized extended particle filter, combining vehicle mounted sensors with signal strengths of Wi Fi access points. Two methods for road monitoring are described: a Kalman filter used together with a model of the vehicle suspension system, and a relative condition measure based on the power spectral density. Lastly, a method for taking automatic action on an ill-conditioned road segment is proposed in the form of a rescheduling algorithm.The scheduling algorithm is based on the large neighborhood search and is used to integrate road service activities in the short-term production schedule while minimizing introduced production disturbances.The system is demonstrated on experimental data collected in a Swedish underground mine.展开更多
液压管路过渡接头的组合设计是液压系统设计的重要内容。新产品试制过程中,为缩短研发周期,设计前期研发人员一般在Excel中完成过渡接头组合的设计选型工作。摊铺机、铣刨机等自动化程度较高的工程机械产品,由于液压系统复杂,液压元部...液压管路过渡接头的组合设计是液压系统设计的重要内容。新产品试制过程中,为缩短研发周期,设计前期研发人员一般在Excel中完成过渡接头组合的设计选型工作。摊铺机、铣刨机等自动化程度较高的工程机械产品,由于液压系统复杂,液压元部件种类、数量繁多,导致过渡接头型号与数量的统计工作繁重。为高效准确地完成上述工作,分析过渡接头统计的方法,借助VSTO(Visual Studio Tools for Office)开发工具对Excel进行客户化定制,开发了统计模块,并通过自主研制的铣刨机SM100M-3液压系统设计的应用案例,验证了模块的高效性。展开更多
基金partially supported by the Wallenberg AIAutonomous Systems and Software Program (WASP) funded by the Knut and Alice Wallenberg Foundation
文摘Poor road conditions in underground mine tunnels can lead to decreased production efficiency and increased wear on production vehicles. A prototype system for road condition monitoring is presented in this paper to counteract this. The system consists of three components i.e. localization, road monitoring, and scheduling. The localization of vehicles is performed using a Rao-Blackwellized extended particle filter, combining vehicle mounted sensors with signal strengths of Wi Fi access points. Two methods for road monitoring are described: a Kalman filter used together with a model of the vehicle suspension system, and a relative condition measure based on the power spectral density. Lastly, a method for taking automatic action on an ill-conditioned road segment is proposed in the form of a rescheduling algorithm.The scheduling algorithm is based on the large neighborhood search and is used to integrate road service activities in the short-term production schedule while minimizing introduced production disturbances.The system is demonstrated on experimental data collected in a Swedish underground mine.
文摘液压管路过渡接头的组合设计是液压系统设计的重要内容。新产品试制过程中,为缩短研发周期,设计前期研发人员一般在Excel中完成过渡接头组合的设计选型工作。摊铺机、铣刨机等自动化程度较高的工程机械产品,由于液压系统复杂,液压元部件种类、数量繁多,导致过渡接头型号与数量的统计工作繁重。为高效准确地完成上述工作,分析过渡接头统计的方法,借助VSTO(Visual Studio Tools for Office)开发工具对Excel进行客户化定制,开发了统计模块,并通过自主研制的铣刨机SM100M-3液压系统设计的应用案例,验证了模块的高效性。