基于固态变压器(solid state transformer, SST)的交直流混合配电系统对于大规模消纳可再生能源具有重要意义,可靠的控制策略是保障混合配电系统稳定运行的关键。提出了基于SST的交直流混合配电系统协调运行控制策略,子网内“源、储、...基于固态变压器(solid state transformer, SST)的交直流混合配电系统对于大规模消纳可再生能源具有重要意义,可靠的控制策略是保障混合配电系统稳定运行的关键。提出了基于SST的交直流混合配电系统协调运行控制策略,子网内“源、储、荷”的控制策略可自主实现子网内部的功率平衡;低压级能够维持低压交流母线电压,并实现交直流子网的互济互助;隔离级耦合中压直流母线与低压直流母线,支撑中压直流母线电压;中压级能够构建中压交流母线电压,实现低压级与中压级的互相支撑,并且在离网和并网时均采用电压源输出形式,无需切换控制策略,配合预同步控制实现模式间的无缝切换。RTDS仿真结果表明,系统可采用统一控制策略,无通信实现基于SST的交直流混合配电系统的功率协调与多模式间无缝切换,验证了所提控制策略的有效性与可行性。展开更多
针对战术协同组网数据链延时大、容量小的问题,为满足基于突发业务战术网络低延时、大容量的要求,以战术瞄准网络技术(TTNT)为背景,提出一种基于多路同时接收的阈值自适应接入体制(MR-ATMA,Adaptive Threshold Multiple Access Based on...针对战术协同组网数据链延时大、容量小的问题,为满足基于突发业务战术网络低延时、大容量的要求,以战术瞄准网络技术(TTNT)为背景,提出一种基于多路同时接收的阈值自适应接入体制(MR-ATMA,Adaptive Threshold Multiple Access Based on Multi-Channel Simultaneous Reception)。该接入体制采用分层设计的开放式体系架构,物理层采用基于快速跳频的多路同时接收技术,实现了虚拟全双工传输模式;MAC层采用基于信道负载感知的阈值自适应接入技术,能够实现突发业务的快速接入。与基于单收处理的接入体制(SR-ATMA,Adaptive Threshold Multiple Access Based on Single-Channel Reception),CSMA,TDMA等接入体制相比,MR-ATMA具有更高的信道利用率和更低的接入延时,能很好地适用于具有突发业务特点的战术网络。展开更多
Multi-robot coordination （MRC） is a key challenge for complex artificial intelligence systems, and conventional wireless-communication-based MRC mechanisms that cannot be deployed in radio-frequency-limited environ-...Multi-robot coordination （MRC） is a key challenge for complex artificial intelligence systems, and conventional wireless-communication-based MRC mechanisms that cannot be deployed in radio-frequency-limited environ- ments. In this Letter, we present a promising solution that utilizes indoor omni-directional visible light communication （VLC） technology to realize efficient multi-robot intelligent coordination （MRIC）. The specific design is presented along with the implemental details of a practical MRIC experimental platform. The exper- imental results show that a 50 Mb/s on-off-keying-based omni-directional VLC can be realized with an effective distance of 2.3 m and a bit error rate of 〈10^-6 in the proposed MRIC platform.展开更多
文摘基于固态变压器(solid state transformer, SST)的交直流混合配电系统对于大规模消纳可再生能源具有重要意义,可靠的控制策略是保障混合配电系统稳定运行的关键。提出了基于SST的交直流混合配电系统协调运行控制策略,子网内“源、储、荷”的控制策略可自主实现子网内部的功率平衡;低压级能够维持低压交流母线电压,并实现交直流子网的互济互助;隔离级耦合中压直流母线与低压直流母线,支撑中压直流母线电压;中压级能够构建中压交流母线电压,实现低压级与中压级的互相支撑,并且在离网和并网时均采用电压源输出形式,无需切换控制策略,配合预同步控制实现模式间的无缝切换。RTDS仿真结果表明,系统可采用统一控制策略,无通信实现基于SST的交直流混合配电系统的功率协调与多模式间无缝切换,验证了所提控制策略的有效性与可行性。
文摘针对战术协同组网数据链延时大、容量小的问题,为满足基于突发业务战术网络低延时、大容量的要求,以战术瞄准网络技术(TTNT)为背景,提出一种基于多路同时接收的阈值自适应接入体制(MR-ATMA,Adaptive Threshold Multiple Access Based on Multi-Channel Simultaneous Reception)。该接入体制采用分层设计的开放式体系架构,物理层采用基于快速跳频的多路同时接收技术,实现了虚拟全双工传输模式;MAC层采用基于信道负载感知的阈值自适应接入技术,能够实现突发业务的快速接入。与基于单收处理的接入体制(SR-ATMA,Adaptive Threshold Multiple Access Based on Single-Channel Reception),CSMA,TDMA等接入体制相比,MR-ATMA具有更高的信道利用率和更低的接入延时,能很好地适用于具有突发业务特点的战术网络。
基金supported in part by the National 973Program of China(No.2013CB329205)the National Natural Science Foundation of China(No.61401032)the Funds of Beijing Advanced Innovation Center for Future Internet Technology of Beijing University of Technology(BJUT),P.R.China
文摘Multi-robot coordination （MRC） is a key challenge for complex artificial intelligence systems, and conventional wireless-communication-based MRC mechanisms that cannot be deployed in radio-frequency-limited environ- ments. In this Letter, we present a promising solution that utilizes indoor omni-directional visible light communication （VLC） technology to realize efficient multi-robot intelligent coordination （MRIC）. The specific design is presented along with the implemental details of a practical MRIC experimental platform. The exper- imental results show that a 50 Mb/s on-off-keying-based omni-directional VLC can be realized with an effective distance of 2.3 m and a bit error rate of 〈10^-6 in the proposed MRIC platform.
