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1.
通过分析直升机搜潜的任务过程,结合蒙特卡洛法的随机抽样特性,建立了基于蒙特卡洛法的效能 评估模型,用以评估直升机使用浮标搜潜的成功概率。基于仿真实验对有人直升机搜潜、无人直升机双机编组 搜潜、有无人直升机协同搜潜的效能进行了对比分析。  相似文献   
2.
Small space robots have the potential to revolutionise space exploration by facilitating the on-orbit assembly of infrastructure, in shorter time scales, at reduced costs. Their commercial appeal will be further improved if such a system is also capable of performing on-orbit servicing missions, in line with the current drive to limit space debris and prolong the lifetime of satellites already in orbit. Whilst there have been a limited number of successful demonstrations of technologies capable of these on-orbit operations, the systems remain large and bespoke. The recent surge in small satellite technologies is changing the economics of space and in the near future, downsizing a space robot might become be a viable option with a host of benefits. This industry wide shift means some of the technologies for use with a downsized space robot, such as power and communication subsystems, now exist. However, there are still dynamic and control issues that need to be overcome before a downsized space robot can be capable of undertaking useful missions. This paper first outlines these issues, before analyzing the effect of downsizing a system on its operational capability. Therefore presenting the smallest controllable system such that the benefits of a small space robot can be achieved with current technologies. The sizing of the base spacecraft and manipulator are addressed here. The design presented consists of a 3 link, 6 degrees of freedom robotic manipulator mounted on a 12U form factor satellite. The feasibility of this 12U space robot was evaluated in simulation and the in-depth results presented here support the hypothesis that a small space robot is a viable solution for in-orbit operations.  相似文献   
3.
郭继峰  郑红星  贾涛  颜鹏 《宇航学报》2020,41(6):686-696
针对异构无人系统的规模、异构性强弱,对异构无人系统进行了分类,引入了异构无人系统协同作战班组的概念以及应用设想,并通过城市环境中异构无人系统协同作战问题为牵引,提出了异构无人系统协同作战面临的挑战与解决思路,在此基础之上,从异构无人系统协同控制架构、协同任务规划、智能交互、目标感知、环境感知等主要方面对异构无人系统协同作战的关键技术进行了分析,最后对异构无人系统协同作战目前的研究进展与挑战进行了总结。  相似文献   
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部分隐藏的随机化回答方法是基于关联规则数据挖掘的隐私保护算法,针对该算法在重构频繁项集支持度上的指数级时间复杂度导致算法执行效率下降的不足,采用分治策略和集合运算方法对该算法进行改进,消除重构数据的指数级运算。改进算法降低了算法的时间复杂度并有效提高了执行效率。仿真实验与分析表明了改进算法的有效性。  相似文献   
6.
Remote robotic data provides different information than that obtained from immersion in the field. This significantly affects the geological situational awareness experienced by members of a mission control science team. In order to optimize science return from planetary robotic missions, these limitations must be understood and their effects mitigated to fully leverage the field experience of scientists at mission control.  相似文献   
7.
美军已将网络战作为一种新的作战形式引入作战领域,近年来正加速推进网络战体系建设,在战略理论、指挥机构建设、技术装备研究和训练演习等方面已取得了较大进展,并具备了较强的作战能力。归纳了美国家及军队重要网络空间战略文件的主要内容,评述了主要网络战指挥机构及作战力量建设过程与现状,分析了美军网络战技术与装备研究的进展,并对其训练演习情况进行了阐述。其研究成果对全面理解美军网络战体系建设的特点、措施及现状具有参考价值。  相似文献   
8.
SCOR模型浅析   总被引:3,自引:0,他引:3  
本文介绍了供应链运作参考模型的产生及主要构成,与其它绩效考核体系的区别,以及对于供应链管理的作用.  相似文献   
9.
在讨论武器系统效能评估定义的基础上,综述了航空武器系统效能评定的方法,给出了现代航空武器系统效能分析与综合的定义以及数学模型。  相似文献   
10.
ESA’s Rosetta mission was launched in March 2004 and is on its way to comet 67P/Churyumov-Gerasimenko, where it is scheduled to arrive in summer 2014. It comprises a payload of 12 scientific instruments and a Lander. All instruments are provided by Principal Investigators, which are responsible for their operations. As for most ESA science missions, the ground segment of the mission consists of a Mission Operations Centre (MOC) and a Science Operations Centre (SOC). While the MOC is responsible for all spacecraft-related aspects and the final uplink of all command timelines to the spacecraft, the scientific operations of the instruments and the collection of the data and ingestion into the Planetary Science Archive are coordinated by the SOC. This paper focuses on the tasks of the SOC and in particular on the methodology and constraints to convert the scientific goals of the Rosetta mission to operational timelines.  相似文献   
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