【作者】 王亚君；

【导师】 张芝贤；

【作者基本信息】 沈阳航空航天大学 ， 信号与信息处理， 2011， 硕士

【摘要】 无人飞机(UAV)编队通信中节点在高速运动状态的下,有可能由于受到通信条件的制约或节点意外失效,从而失去与控制中心的联络关系。这种条件下,为了保证节点间通信畅通,必须在各编队节点间采用无线自组网技术,建立无线通信网络,保持节点和节点之间的通信,UAV编队自组网必须还要具有一定的可控性。编队自组网对节点间通信的时限要求很高,这就要求在保持畅通的情况下通信协议要尽可能的简单。为更好地满足编队在高速运行状态下的可靠通信,保证编队作业的圆满完成,本文针对UAV通信网络需求,将固定分配协议和动态分配协议两种协议相结合,设计了一种新型TDMA时隙分配模型—CD-ALOHA模型,并利用GPS为整个系统提供时间同步。模型充分利用自组织特性,完成工作模式、时隙与网络的动态管理,以满足系统需求。本系统以C8051F350作为MCU,结合无线通信模块和GPS系统,完成无线通信和系统定位。在通信中,结合时隙ALOHA媒体接入控制协议的基本方法,对其改进,避免信道竞争,保证各节点的数据信息在其专有时隙进行及时、可靠的信息收发,同时解决了由于传输延迟导致的数据传输率下降和数据之间的碰撞问题,更加适合UAV通信自组网战术信息传输的实时可靠性要求。论文最后对CD-ALOHA模型进行了硬件验证,通过各项调试结果证明了系统实现了有UAV编队自组网的基本通信功能及定位功能,达到了预期的效果。更多还原

【Abstract】 In the UAVs formation communication the nodes are in continual rapid motion. Because of the accident or the limits of communication conditions, the formated-nodes may be lost contact with the control center. Under these conditions, a wireless communication networks is established to maintain communication between nodes. The new network must be controllable. The limit time of communication between nodes is very strictly, so the communication strategy must be as simple as possible under maintaining communication.The whole design aims at the UAV communication network requirements, two modes of fixed allocation access mode and dynamic allocation access mode are combined to better satisfy formation in high-speed condition of reliable communication and to guarantee the formation. A new TDMA time slot model—CD-ALOHA model is designed. And the system uses GPS to provide time synchronization. Model makes use of self-organized characteristic, completes dynamic management of the work mode and time slot.The system uses C8051F350 as MCU, and combines with wireless communication modules and global positioning system. The whole system mainly completes wireless communication and position. S-Aloha media access control protocol is improves and combines with the hardware. The system completes to avoid channel competition, and sends the data information of each node timely and reliably in its exclusive time slot. In the same time system avoids the decline of data transfer rate and data collision rate due to the delay. The whole design is more suitabled for UAV formation communication network. Finally CD-ALOHA model is checked on the hardware, system realizes the UAV formation communication and position through various commissioning results.更多还原