The number and creativity of side channel attacks have increased dramatically in recent years. Of particular interest are attacks leveraging power line communication to 1) gather information on power consumption from ...The number and creativity of side channel attacks have increased dramatically in recent years. Of particular interest are attacks leveraging power line communication to 1) gather information on power consumption from the victim and 2) exfiltrate data from compromised machines. Attack strategies of this nature on the greater power grid and building infrastructure levels have been shown to be a serious threat. This project further explores this concept of a novel attack vector by creating a new type of penetration testing tool: an USB power adapter capable of remote monitoring of device power consumption and communicating through powerline communications.展开更多
在目标-攻击弹-防御弹群(target-attacker-defenders,TADs)系统中,防御弹群通过与目标(载机)异构协同、弹群间同构协同以保护载机并降低单弹脱靶的风险。针对TADs系统在二维平面下的协同主动防御模型进行了研究,采用机/弹协同和防御弹...在目标-攻击弹-防御弹群(target-attacker-defenders,TADs)系统中,防御弹群通过与目标(载机)异构协同、弹群间同构协同以保护载机并降低单弹脱靶的风险。针对TADs系统在二维平面下的协同主动防御模型进行了研究,采用机/弹协同和防御弹群协同的两层制导策略。在机弹协同方面,防御弹领弹与载机进行异构协同,考虑载机及防御弹领弹的机动能力限制,采用协同视线制导律(cooperative line of sight guidance,CLOSG)分别得到载机和防御弹领弹的制导指令;在防御弹群协同方面,考虑单弹计算能力约束,拦截时间约束和加速度约束,设计出基于分布式模型预测控制(distributed model predictive control,DMPC)的算法实现弹群从弹和防御弹领弹协同同时抵达并拦截攻击弹。仿真结果表明,多防御弹协同一致拦截制导算法能够实现TADs系统中载机和防御弹群的异构协同主动防御,并实现防御弹群的一致性同时拦截,以降低单弹脱靶的风险。展开更多
为研究特高压(Ultra High Voltage,UHV)输电线路的绕击耐雷性能及其防雷措施,结合某特高压线路的工程实际,对其进行绕击耐雷性测试,并在此基础上进行线路绕击耐雷性能分析。结果表明:特高压输电线路的绕击耐雷性能较差,通过优化杆塔接...为研究特高压(Ultra High Voltage,UHV)输电线路的绕击耐雷性能及其防雷措施,结合某特高压线路的工程实际,对其进行绕击耐雷性测试,并在此基础上进行线路绕击耐雷性能分析。结果表明:特高压输电线路的绕击耐雷性能较差,通过优化杆塔接地电阻和降低线路高度能够有效提高其耐雷性能;采用减小地线保护角的方式可以有效降低雷击跳闸率;在特高压输电线路上安装线路避雷器能够有效降低绕击跳闸率;在特高压输电线路的主要进线段安装避雷器,能够提高特高压输电线路的绕击耐雷性能。展开更多
文摘The number and creativity of side channel attacks have increased dramatically in recent years. Of particular interest are attacks leveraging power line communication to 1) gather information on power consumption from the victim and 2) exfiltrate data from compromised machines. Attack strategies of this nature on the greater power grid and building infrastructure levels have been shown to be a serious threat. This project further explores this concept of a novel attack vector by creating a new type of penetration testing tool: an USB power adapter capable of remote monitoring of device power consumption and communicating through powerline communications.
文摘在目标-攻击弹-防御弹群(target-attacker-defenders,TADs)系统中,防御弹群通过与目标(载机)异构协同、弹群间同构协同以保护载机并降低单弹脱靶的风险。针对TADs系统在二维平面下的协同主动防御模型进行了研究,采用机/弹协同和防御弹群协同的两层制导策略。在机弹协同方面,防御弹领弹与载机进行异构协同,考虑载机及防御弹领弹的机动能力限制,采用协同视线制导律(cooperative line of sight guidance,CLOSG)分别得到载机和防御弹领弹的制导指令;在防御弹群协同方面,考虑单弹计算能力约束,拦截时间约束和加速度约束,设计出基于分布式模型预测控制(distributed model predictive control,DMPC)的算法实现弹群从弹和防御弹领弹协同同时抵达并拦截攻击弹。仿真结果表明,多防御弹协同一致拦截制导算法能够实现TADs系统中载机和防御弹群的异构协同主动防御,并实现防御弹群的一致性同时拦截,以降低单弹脱靶的风险。
文摘为研究特高压(Ultra High Voltage,UHV)输电线路的绕击耐雷性能及其防雷措施,结合某特高压线路的工程实际,对其进行绕击耐雷性测试,并在此基础上进行线路绕击耐雷性能分析。结果表明:特高压输电线路的绕击耐雷性能较差,通过优化杆塔接地电阻和降低线路高度能够有效提高其耐雷性能;采用减小地线保护角的方式可以有效降低雷击跳闸率;在特高压输电线路上安装线路避雷器能够有效降低绕击跳闸率;在特高压输电线路的主要进线段安装避雷器,能够提高特高压输电线路的绕击耐雷性能。
