反导多传感器协同任务规划综述

针对反导作战多传感器协同任务规划的相关问题,结合反导作战的特点,探讨反导作战信息处理过程与多传感器协同任务规划的关系,并分析多传感器协同任务规划的内涵;在此基础上,梳理出多传感器协同任务规划涉及的关键技术,并综述多源信息综合处理、多传感器协同部署、协同跟踪、协同引导和协同识别等关键技术的研究现状;最后就多传感器协同任务规划的发展提出一些建议。     

信息技术在航空发动机设计体系集成平台建设中的应用

设计体系是航空发动机设计经验的总结归纳和深化结晶。其集成平台的全面应用,将有助于科研工作的层次清晰化、设计协同化、管理规范化及质量精细化,推进科研水平上升一个新的台阶。阐述了充分利用现代信息技术,融汇自主创新研制思路,以设计规范和数字化设计流程为依据,以专业技术设计软件为基本元素,以工程数据库为支持,利用集成技术建立支持多专业协同、信息共享的以数字化为特征的发动机设计体系,初步建造了一套融发动机设计、仿真、优化等于一体的综合集成平台,为航空发动机设计体系建设奠定基础。     

以校企合作推进铁路行业就业准入制度

铁路行业就业准入制度目前面临着诸多问题,校企合作是完善铁路行业就业准入制度的有效途径.建立校企合作机制的具体措施为:校企领导、工程技术人员交叉任职;共同组建"双师型"师资队伍;优化教学计划,科学合理设置课程;共同编写铁路专业教材;共同组建职业资格考评委员会.建立校企合作机制,铁路企业与铁路院校共同培养高技能人才,可以从源头上提高铁路行业就业人才的实际水平,全面提高铁路员工整体素质.     

基于FPGA的高速FIR数字滤波器设计

分布式算法是一项重要的FPGA技术,广泛地应用在数字信号处理领域。文章介绍了分布式算法原理及其改进,设计了一种高速8阶FIR数字滤波器,并进行了仿真验证。最后,对FPGA资源利用和工作速度两方面做了比较和分析。     

基于多agent合作博弈的制造系统调度

针对有多个加工和装备设备的柔性制造系统,提出了一种调度方法.首先根据产品装配结构对问题进行分解,得到多个易于调度的简单问题,形成对应的agent.然后应用合作博弈理论,根据各agent重要性和装配约束获得agent的排序.以此顺序在机器上按照规则进行生产安排,故能够得到满足产品加工约束的近似最优调度结果.最后通过实验对算法进行了验证.     

面向月球科研站任务的地月准实时遥操作模拟验证系统设计与关键技术研究

针对月球科研站任务地月遥操作需求和特点,设计地月准实时遥操作模拟验证系统,对其中的关键技术海量多尺度遥感数据环境感知、空地协同高精度定位、基于混合现实的预测仿真等进行了研究。提出了基于海量多尺度遥感数据的联合处理方法,环境感知数据融合可处理米级至厘米级环境感知结果;设计基于空地多运动平台协同定位的原型软件,空地协同地标约束下,定位精度不低于轨道器影像1个像素;开发了带有力觉反馈的预测仿真验证平台,在2~3 s变时延约束下可在仿真环境下协同演示遥操作过程,真实还原从端的遥操作作业场景,提高遥操作的执行效率和安全性。为地面人员的方案设计、操作手训练、故障处置等提供实时支持,为我国未来实施月球科研站任务筑牢基础。     

Exploring mission planning method for a team of carrier aircraft launching

High-level efficiency and safety are of great significance for improving the fighting capability of an aircraft carrier. One way to enhance efficiency and safety level is to organize the carrier aircraft into combat effectively. This paper studies the mission planning problem for a team of carrier aircraft launching, and a novel distributed mission planning architecture is proposed. The architecture is hierarchical and is comprised of four levels, namely, the input level, the coordination level,the path planning level and the execution level. Realistic constraints in each level of the distributed architecture, such as the vortex flow effect, the crowd effect and the motion of aircraft, are considered in the model. To solve this problem, a distributed path planning algorithm based on the asynchronous planning strategy is developed. The proposed Mission Planning Approach for Carrier Aircraft Launching(MPACAL) is validated using the setups of the Nimitz-class aircraft carrier.Compared to the isolated planning architecture and the centralized planning architecture, the proposed distributed planning architecture has advantages in coordinating the launch tasks not only belonging to the same catapult but also when all different catapults are considered. The proposed MPACAL provides a modeling method for the flight deck operation on aircraft carrier.     

Fault-tolerant control and vibration suppression of flexible spacecraft: An interconnected system approach

This paper considers a fault-tolerant control and vibration suppression problem of flexible spacecraft. The attitude dynamics is modeled by an interconnected system, in which the rigid part and the flexible part are coupled with each other. Such a model allows us to use the interconnected system approach to analyze the flexible spacecraft. Both distributed and decentralized observer-based fault-tolerant control schemes are developed, under which the closed-loop stability of flexible spacecraft can be ensured by using the cycle-small-gain theorem. Compared with the traditional method, this paper considers the faults occurred not only in the rigid parts, but also in the flexible parts. In addition, the application of the interconnected system approach simplifies the system model of flexible spacecraft, thereby the difficulty of theoretical analysis and engineering practice of fault-tolerant control of flexible spacecraft are greatly reduced. Simulation results show the effectiveness of the proposed methods and the comparison of different fault-tolerant control approach.     

带反馈分布式不同维传感器状态估计技术

论述了带反馈分布式信息融合系统中传感器观测维数不同时的状态估计方法。在多传感器系统中，目标的测量是在极坐标中获得，而数据处理通常是在直角坐标中完成。由于二维传感器不能获得观测目标的俯仰信息，其估计将会产生一定的动态误差。在分布式的信息融合系统中，各传感器需要将各自的局部估计送到融合中心进行统一处理。如果不适当地减小这种动态误差，必然将导致整个信息融合系统的估计精度下降。针对上述问题，文章讨论了如何利用系统反馈信息，减小二维传感器的局部估计误差，从而提高整个系统的估计精度。最后，给出了算法的仿真分析。仿真结果表明该方法能够有效地减小系统动态误差。     

International cooperation and competition in civilian space activities

This article considers how the USA can best maintain its commercial and governmental competitiveness in space, while facilitating private investment and international marketing, and at the same time keeping up significant cooperation with other nations. The current state of US civilian space activities in each of these areas is summarized, and several alternative solutions are presented. The article concludes that strengthening US competition with other space-capable nations, and improving US ability to cooperate effectively, will require careful coordination of the activities of federal agencies with each other and with the private sector.