排序方式: 共有57条查询结果,搜索用时 15 毫秒
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基于HLA的协同仿真运行管理集成环境 总被引:2,自引:0,他引:2
基于HLA的协同仿真运行管理集成环境主要解决复杂分布仿真系统设计中的仿真问题.通过定义支持仿真运行管理环境的开放接口,使所有符合仿真运行管理环境规范的仿真工具和仿真应用都可以在仿真运行管理环境的支持下,集成起来.协同仿真运行管理集成环境支持不同类型仿真应用子系统的互操作,支持仿真工具的集成,具有仿真运行管理、仿真时间管理、仿真数据管理等功能.协同仿真运行管理集成环境的应用领域十分广泛,具有很大的实用价值. 相似文献
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为飞机等交通工具内的用户提供基于卫星的不间断IP连接,并在卫星星座网络内实现IP路由选择功能,是未来LEO卫星星座通信网络需要解决的关键问题。提出了基于移动式网络技术的LEO卫星星座通信网络体系结构,实现了卫星星座通信网络中的IP路由选择功能,并降低了对地面网路的依赖,实现了对用户段网络随时随地的连接支持。在对卫星星座通信网络中的星地切换模式进行分析的基础上,提出了一种基于虚拟移动路由器的快速星地切换和认证方法。通过NS2仿真试验,给出了新型LEO卫星星座通信网络的传输延迟特性以及快速切换方法的仿真试验结果。仿真试验表明,提出的网络结构是满足未来卫星星座发展需求的,星地间的切换是低时延的。 相似文献
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Kyeong Ja Kim Joo-Hee Lee Haingja Seo Gwanghyeok Ju Sang-Ryool Lee Gi-Hyuk Choi Eun-Sup Sim Tai Sik Lee 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2014
Korea is planning a series of lunar space programs in 2020 starting with a lunar orbiter and a lander with a rover. Compared to other countries, Korea has a relatively brief history in space and planetary sciences. With the expected Korean missions on the near-term horizon and the relatively few Korean planetary scientists, Korea Institute of Geoscience and Mineral Resources (KIGAM) has established a new planetary research group focusing on development of prospective lunar instruments, analysis of the publicly available planetary data of the Moon, organizing nationwide planetary workshops, and initiating planetary educational programs with academic institutions. Korea has also initiated its own rocket development program, which could acquire a rocket-launch capability toward the Korean lunar mission. For the prospective Korea’s lunar science program, feasibility studies for some candidate science payloads have been started since 2010 for an orbiter and a lander. The concept design of each candidate instrument has been accomplished in 2012. It is expected that the development of science payloads may start by 2014 as Phase A. Not only developing hardware required for the lunar mission but also educational activities for young students are high priorities for Korea. The new plan of the Korean lunar mission can be successfully accomplished with international cooperative outreach programs in conjunction with internationally accessible planetary data system (PDS). This paper introduces the KIGAM’s international cooperative planetary research and educational programs and also summarizes other nationwide new developments for Korean lunar research projects at Kyung Hee University and Hanyang University. 相似文献
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基于HLA的半实物仿真时间管理策略的研究和实现 总被引:5,自引:0,他引:5
在基于HLA的半实物仿真系统中,时间管理策略的设置是保证两种不同机制系统能够进行正确时间推进的有效方法。综合介绍HLA接口规范中的时间管理的主要内容,分析HLA接口设备对时间管理的要求,给出可以采取的时间策略,并根据这一分析结果,设计了一套测试时间管理策略的实验验证方案。实验结果表明,HLA接口设备采用基于时间控制不受限时间管理策略最为可行。同时,为了提高传输性能,建议采用分时法进行数据传输,当确实有大量数据需要一次发送时建议采用多个小包组合成一个大包的方法进行传输。 相似文献
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丁汀 《民用飞机设计与研究》2012,(2):44-48,66
放眼全球化的当今社会,航空交通密度日益增大,机场运营繁忙,部分枢纽型机场的吞吐量逐渐趋近饱和。这种现状对先进的机场场面导向和控制系统提出了更高的要求。与传统的机场导向和控制系统SMGCS(Surface Movement Guidance and Control System)相比,先进的机场场面导向和控制系统A-SMGCS(Advanced-Surface Movement Guidance and Control System)功能分为四部分:监视、路由、导向及控制。将对A-SMGCS的应用背景和发展状况给出较为全面的调研总结[1],并结合ICAOA-SMGCS Manual[3]论述对A-SMGCS提出详细功能需求,最后在此基础上提出A-SMGCS的系统功能架构。 相似文献
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《中国航空学报》2021,34(2):54-78
Residual stress is one of the main factors affecting the mechanical properties of materials, such as their strength, plasticity and surface integrity. For instance, tensile stress conditions can adversely affect material performance or component life, while compressive stress conditions can improve material fatigue strength. During the processing of integrated aviation structures, machining deformation caused by residual stress has become one of the most prominent manufacturing problems. Therefore, it is very important to measure and evaluate the stress for real applications. This paper reviews the research of residual stress measurement methods over the past five years by classifying them according to the measurement methods appearing in each stage. The existing problems and difficulties of each measurement technology are summarized, and future trends are forecasted. This paper provides a reference for further in-depth study of residual stress measurement technologies. 相似文献
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Jean-Charles MARE 《中国航空学报》2019,32(1)
This paper deals with the modelling and simulation of aircraft systems, in particular for power transmission and control. It is intended to review, propose and disseminate best practices for making model-based/simulation-aided engineering more efficient at any phase of the system life cycle. The proposals are aimed at creating value, not only by increasing the performance of the product under study but also by shortening the time to market, capitalizing knowledge, mitigating risks and facilitating concurrent engineering. The needs associated with the engineering activities are firstly identified to define a set of requirements for the models. Then, these requirements are used to drive the considerations leading to model development, focusing in particular on the process, modelled physical effects, modelling level, model architecting and concurrent engineering. The third part deals with the model implementation, giving special consideration to the different types of models, causalities, parameterization, implementation and verification. Each part is illustrated by examples related to safety critical actuators. 相似文献
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