无人机无线电数据链接收链路自动测试系统设计

针对无人机无线电数据链测试过程中存在的精度偏低、人为干扰等问题,设计了一套基于GPIB总线的无人机无线电数据链接收链路自动测试系统;该系统采用工控机作为控制器,结合AX5488-GPIB接口卡通过GPIB总线实现对各测试仪器的控制;利用RS232串口和单片机通信,完成数据采集和各种控制动作;成功地实现了对多台接收机多个参数的自动循环测试;实验结果表明,该测试系统满足数据链部件指标测试要求,且运行稳定可靠,达到了预期效果.     

无人机数据链自动测试系统测控组件的设计

针对无人机数据链自动测试系统的研制必要性,文章介绍了该系统测控组件的功能与软、硬件设计,并针对测控组件的强电磁干扰工作环境特点,阐述了硬件及软件的抗干扰措施;应用结果表明,该组件工作稳定可靠,满足自动测试系统的要求。     

无人机测控与高速数据传输系统

针对无人机宽带数据链地空高速数据传输需求,设计实现了一种基于分布式软件无线电架构的全双工无人机测控与高速数据传输系统。从总体角度阐述了系统组成与工作原理,介绍了关键软硬件设计实现方案,通过静态无线试验、飞行试验,验证了空口速率800 Mbit/s高速数据传输系统方案可行性,达到了1080P图像无损高清高质量传输。相比传统无人机宽带数据链,本系统工作频段更高、传输速率更快,同时,系统采用模块化、标准化设计,扩展性、维修性更好。     

通用无线电数据链自动测试系统软件可靠性设计

通用无线电数据链自动测试系统是为解决无线电数据链部件在设计、生产中的实际问题而研制的,系统在软件控制下工作,软件可靠性直接影响到系统安全与准确性,因此在设计中占据了重要地位;文章通过对系统可靠性要求的分析,提出了针对性地解决措施并通过模型进行了分析与测试,结果表明,系统软件可靠性达到了应用要求。     

软件无线电技术在无人机数据链系统中的应用

软件无线电技术具有使用灵活、保密性强、适应广泛、升级简便的特点,因而在军用和民用无线通信中有着广阔的应用前景;研究软件无线电技术在分析无人机数据链系统信号、信道方面的应用十分必要;通过对软件无线电平台、关键技术和算法的介绍分析,结合基于R&S公司的SMU200构建的无人机数据链仿真系统,对无人机数据传输链路中不同样式信号的采集、解调以及信道模型对传输的影响进行仿真分析,得出保证数据链路有效传输的条件,同时验证了数字仿真系统的可靠性。     

中间件技术在UAV数据链网关中的应用

数据链网关是无人机系统的重要组成部分,传统的数据链网关由于不具有开放性,已无法满足无人机系统的发展要求。文章首先分析了当前数据链网关的不足,然后介绍了RTCORBA中间件的特点,最后提出了一种基于RTCORBA的开放性数据链网关设计方案,与传统的数据链网关相比,该网关更具开放性。     

无人机上行链路的安全策略研究

该文简单总结了无人机信息传输系统的体系结构和特点。通过对无人机数据链路潜在的各种安全威胁进行分析,设计了一种针对上行链路加密的方案,即采用安全高效的混合加密体制,来保证无人机上行链路数据的保密性、完整性和可靠性。     

小型无人直升机通信系统的设计与实现

通信系统是无人机系统中最重要的组成部分之一,为了实现小型无人直升机稳定可靠的全自主飞行控制,设计并实现了基于WIFI并运用UDP协议和SOCKET通信机制的无人机系统实验数据链,在此基础上,基于无线射频模块和WIFI,实现了用于无人机运营阶段的远程飞行数据链;首先介绍无人机的通信系统框架,再对无人机实验数据链和远程飞行数据链的数据通信协议及软硬件实现进行详细说明;该通信系统有充裕的数据载荷,数据下传和上传延迟满足系统实时显示和控制要求,可在无人机平台上稳定可靠运行.     

小型无人机空地数据链系统的应用研究

设计了一种适用于小型无人机的空地数据链系统；文中提出了详细的系统设计方案，对数据链的传输方式、传输内容、传输流程等进行了研究；并给出了系统的软件设计和实现方法。     

一种无人机视距数据链通视分析方法

中大型无人机系统具有良好的航程航时性能,其配备的视距数据链的理论作用距离通常可达数百公里,但受限于无线电通视条件,实际作用距离变化显著,影响飞行控制操作和任务完成度。提出了一种无人机视距数据链通视分析方法,利用Global Mapper软件基于地理信息系统(GIS)处理能力,分析在不同飞行高度下的视距地面数据终端与无人机的通视区域,可推广至无人机载荷对地侦察任务区域分析,协助预先和在线进行飞行任务航迹规划,确定空域限制条件。经过实际检验,证明本方法快速高效、符合度高,特别适用于无人机执飞高原和山区等地形地貌复杂区域。     

无人直升机数据链路系统的设计与实现

针对无人直升机远距离遥控和通信以及抗干扰的要求,设计了一套新的数据链路系统;系统主要介绍结构组成以及各部分的功能,阐述了以无线数传和WIFI为基础的无人直升机无线数据链系统的设计思想和总体方案,论述了系统的硬件构成及软件的特点;该系统已初步实现并通过实验和验证,成功应用于某小型无人直升机;具体实验中,已实现5公里范围内的有效控制和2公里以内的数据下传;并且逐步转移至更大机型进行实验工作。     

基于无线数传技术的现场参数自动巡检系统

研制开发了一种能自动检测井口参数的仪表系统 ,具有现场数据无线实时传输、无线报警、无线起停控制以及巡检自动化和无人职守等功能 ,同时也具有一定的防盗功能。经实际使用 ,效果非常好 ,值得推广。重点介绍了设计思路和方法     

Design and Implementation of Wireless Camera,Communication, and Control Modules for a Transformable Unmanned Aerial Vehicle

In this paper, we present the design and implementation of the wireless camera component, communications, and control components for a gun-launched, transformable Unmanned Aerial Vehicle (UAV). The transformable UAV is designed to be able to detect standard targets. In addition, the transformable UAV can be converted from a gun-launched projectile transformed to a UAV, and bevisually guided to a target. The implementation and design of the system presented in this paper addresses four tasks. The first task is the investigation of wireless components, including transmitter, receiver, and antenna. The second task is system implementation, i.e., the design and integration of the wireless components with the UAV Control. The third task is the implementation of the wireless camera component through installation of the video camera on the UAV for display on a PC. The last task is the demonstration of the wireless link and camera components of the transformable UAV system.     

A low-cost communication security scheme of UAV based on multi-round reverse auction model

In recent years, the security of wireless communication has received more and more attention. However, with the increasing requirements for security performance in the process of wireless communication, the cost of improving security also increases. Therefore, how to improve the security of wireless communication while reducing costs has become a serious challenge. Aiming at the security problems in the UAV-assisted wireless communication link based on the premise of low cost and high profit, this paper studies how to motivate non-offloading users to send jamming power to interfere with eavesdropping UAVs, so efficiently and economically to improve the security performance of wireless communication link. Firstly, the relationship between the security performance of the communication link and the interference power is revealed through the theoretical model. Then, we propose a scenario consisting of a legitimate UAV, a ground user group, and an eavesdrop UAV. In this scenario, we divide the ground users into offloading users and non-offloading users. At the same time, the cost functions for offloading users and utility functions for non-offloading users are defined, and non-offloading users are encouraged to help to offload users unload data safely to a legitimate UAV by obtaining rewards for offloading users. Considering the selfishness of users, a reverse auction algorithm based on multi-user groups is proposed to achieve the optimal mapping between non-offloading users and offloading users. Finally, the effectiveness of the proposed scheme is verified by a large number of simulations. The research results show that the scheme innovative designs a method for users to cooperate to interfere with eavesdroppers, which can reduce costs and improve utility while maximizing the improvement of wireless communication link security.     

输电线路无人机自动巡检系统不间断作业实时监控方法

针对输电线路无人机自动巡检信息冗杂,数据噪声较大,海量数据传输难以完整传输的问题,提出了一种输电线路无人机自动巡检系统不间断作业实时监控方法,保障输电线路不间断作业。构建输电线路不间断作业监控架构,利用无人机自动巡检系统的无人机飞行器实时采集输电线路图像信息,经无线传输模块传输至地面站存储;输电线路不间断作业监控模块调用采集到的数据,采用非局部均值滤波算法去噪处理输电线路图像,将去噪后图像输入至卷积神经网络,优化检测异常输电线路图像,并利用粗定位算法定位异常点,便于巡检人员实时修复输电线路,实时监控输电线路不间断作业。实验结果表明,所提方法能够清晰、直观地检测到输电线路异常点,实时监控输电线路不间断作业;拥有较为优秀的去噪效果,为后期高效、实时检测输电线路异常点提供保障;信息传输性能突出,保证海量数据传输具有极高的完整性。     

无人机OFDM数据链路中信道估计算法研究

针对无人机信道的特点,以及采用正交频分复用技术进行无人机数据链路传输的优点.在对OFDM关键技术信道估计进行研究时,要确保接收端能够准确的检测出由于无线信道变化造成的码间干扰,准确的解调出原信号.根据系统需要设计了梳状导频和块状导频联合的导频插入方式,该方式可以在数据传输和信道估计性能上做到折中,并对常用的信道估计算法进行分析研究提出了改进的最小均方误差信道估计算法,最后建立频率选择性信道模型对不同的信道估计算法进行仿真,分析仿真结果可以看出该导频插入方式和信道估计算法具有较低的复杂度,而且又具有良好的信道估计性能,适合在实际系统中应用.     

UAV-assisted data gathering in wireless sensor networks

An unmanned aerial vehicle (UAV) is a promising carriage for data gathering in wireless sensor networks since it has sufficient as well as efficient resources both in terms of time and energy due to its direct communication between the UAV and sensor nodes. On the other hand, to realize the data gathering system with UAV in wireless sensor networks, there are still some challenging issues remain such that the highly affected problem by the speed of UAVs and network density, also the heavy conflicts if a lot of sensor nodes concurrently send its own data to the UAV. To solve those problems, we propose a new data gathering algorithm, leveraging both the UAV and mobile agents (MAs) to autonomously collect and process data in wireless sensor networks. Specifically, the UAV dispatches MAs to the network and every MA is responsible for collecting and processing the data from sensor nodes in an area of the network by traveling around that area. The UAV gets desired information via MAs with aggregated sensory data. In this paper, we design a itinerary of MA migration with considering the network density. Simulation results demonstrate that our proposed method is time- and energy-efficient for any density of the network.