首先,设计了节点自适应传感半径调整算法(AASR,adaptive adjustment of sensing radius),通过节点自适应选择最佳的覆盖范围,有效地进行节点覆盖控制,减少节点能量虚耗,提高覆盖效率。其次,从调整效果、能量消耗和覆盖冗余度3个方面对...首先,设计了节点自适应传感半径调整算法(AASR,adaptive adjustment of sensing radius),通过节点自适应选择最佳的覆盖范围,有效地进行节点覆盖控制,减少节点能量虚耗,提高覆盖效率。其次,从调整效果、能量消耗和覆盖冗余度3个方面对节点自适应传感半径调整算法进行了模拟实验和分析。仿真结果表明,AASR能够有效提高节点生存时间,减少能量消耗,提高覆盖率。展开更多
This paper deals with the co-design problem of event-triggered communication scheduling and platooning control over vehicular ad-hoc networks(VANETs)subject to finite communication resource.First,a unified model is pr...This paper deals with the co-design problem of event-triggered communication scheduling and platooning control over vehicular ad-hoc networks(VANETs)subject to finite communication resource.First,a unified model is presented to describe the coordinated platoon behavior of leader-follower vehicles in the simultaneous presence of unknown external disturbances and an unknown leader control input.Under such a platoon model,the central aim is to achieve robust platoon formation tracking with desired inter-vehicle spacing and same velocities and accelerations guided by the leader,while attaining improved communication efficiency.Toward this aim,a novel bandwidth-aware dynamic event-triggered scheduling mechanism is developed.One salient feature of the scheduling mechanism is that the threshold parameter in the triggering law is dynamically adjusted over time based on both vehicular state variations and bandwidth status.Then,a sufficient condition for platoon control system stability and performance analysis as well as a co-design criterion of the admissible event-triggered platooning control law and the desired scheduling mechanism are derived.Finally,simulation results are provided to substantiate the effectiveness and merits of the proposed co-design approach for guaranteeing a trade-off between robust platooning control performance and communication efficiency.展开更多
具有高比例新能源和高比例电力电子设备的新型电力系统是实现“双碳”目标的重要手段,但新型电力系统也会带来一系列不稳定的问题。在新型电力系统中,构网型控制技术(grid-forming control technology,GFM)具有电压支撑和主动惯量特性,...具有高比例新能源和高比例电力电子设备的新型电力系统是实现“双碳”目标的重要手段,但新型电力系统也会带来一系列不稳定的问题。在新型电力系统中,构网型控制技术(grid-forming control technology,GFM)具有电压支撑和主动惯量特性,以此替代同步机实现电网支撑,并维持电力系统稳定性,因此GFM具有广阔的发展和应用前景。基于此,首先,对储能变流器的拓扑进行简要介绍,并针对GFM技术的控制特点为其选型;其次,对于现有的构网型控制策略进行总结分析;最后,提出当前研究难点以及发展过程中所面临的问题和挑战,为构网型控制技术今后的发展建设提供思路。展开更多
文摘首先,设计了节点自适应传感半径调整算法(AASR,adaptive adjustment of sensing radius),通过节点自适应选择最佳的覆盖范围,有效地进行节点覆盖控制,减少节点能量虚耗,提高覆盖效率。其次,从调整效果、能量消耗和覆盖冗余度3个方面对节点自适应传感半径调整算法进行了模拟实验和分析。仿真结果表明,AASR能够有效提高节点生存时间,减少能量消耗,提高覆盖率。
基金This work was supported in part by the Australian Research Council Discovery Early Career Researcher Award under Grant DE200101128.
文摘This paper deals with the co-design problem of event-triggered communication scheduling and platooning control over vehicular ad-hoc networks(VANETs)subject to finite communication resource.First,a unified model is presented to describe the coordinated platoon behavior of leader-follower vehicles in the simultaneous presence of unknown external disturbances and an unknown leader control input.Under such a platoon model,the central aim is to achieve robust platoon formation tracking with desired inter-vehicle spacing and same velocities and accelerations guided by the leader,while attaining improved communication efficiency.Toward this aim,a novel bandwidth-aware dynamic event-triggered scheduling mechanism is developed.One salient feature of the scheduling mechanism is that the threshold parameter in the triggering law is dynamically adjusted over time based on both vehicular state variations and bandwidth status.Then,a sufficient condition for platoon control system stability and performance analysis as well as a co-design criterion of the admissible event-triggered platooning control law and the desired scheduling mechanism are derived.Finally,simulation results are provided to substantiate the effectiveness and merits of the proposed co-design approach for guaranteeing a trade-off between robust platooning control performance and communication efficiency.
文摘具有高比例新能源和高比例电力电子设备的新型电力系统是实现“双碳”目标的重要手段,但新型电力系统也会带来一系列不稳定的问题。在新型电力系统中,构网型控制技术(grid-forming control technology,GFM)具有电压支撑和主动惯量特性,以此替代同步机实现电网支撑,并维持电力系统稳定性,因此GFM具有广阔的发展和应用前景。基于此,首先,对储能变流器的拓扑进行简要介绍,并针对GFM技术的控制特点为其选型;其次,对于现有的构网型控制策略进行总结分析;最后,提出当前研究难点以及发展过程中所面临的问题和挑战,为构网型控制技术今后的发展建设提供思路。
文摘构建空天地一体化信息网络是第六代通信系统(the Sixth Generation,6G)的重要目标,无线光通信相较于射频(Radio Frequency,RF)通信技术具有容量大、速率高、抗干扰能力强等优势,已成为建立全球无缝覆盖空间网络的重要技术.本文综述了基于自由空间光通信(Free Space Optical Communication,FSOC)的空天地一体化网络国内外建设及相关标准化现状,相较于现有综述文献,涵盖了更多最新研究工作,并针对物理层和上层指出一体化FSOC网络设计需要关注的重要因素,对大气信道建模、“捕获、瞄准和跟踪”(Acquisition Pointing and Tracking,APT)、拓扑控制、路由、资源分配、可靠传输协议、微波协作传输几种重要通信技术进行总结和分析,并指出其未来发展趋势和面临的挑战.
