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首页> 外文期刊>Acta astronautica >Multi-channel wireless sensor network for Heavy-Lift Launch Vehicles
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Multi-channel wireless sensor network for Heavy-Lift Launch Vehicles

机译：重型运载火箭的多通道无线传感器网络

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摘要

A typical new generation Heavy-Lift Launch Vehicle (HLV) has more than 600 sensors on board. More than 80% of these sensors are used for non-critical operational and technological data. This data is sent to the ground launching controllers allowing them to supervise, in real time or a posteriori, information concerning the state of the HLV and the progress of the launching operation. Sensors are traditionally connected to a concentrator entity using cables. The concentrator is a special node in charge of collecting data that is generated by sensors and transmit it to the ground controllers unit. The use of wireless technology to interconnect sensor nodes with the concentrator would allow an ease of deployment and a weight gain which will help achieve assembly time reduction and a gain in terms of generated power. Nevertheless, of-the-shelf wireless technologies cannot guarantee a wired equivalent reliability in terms of packet delivery ratio or end-to-end delay. Indeed, when transmitting over wireless communication links it is challenging to find a solution that avoids data loss especially in high data rate scenarios. This is essentially due to the nature of the wireless medium that is very sensitive to the surrounding environment and to the possible simultaneous multiple accesses to the medium by the different sensor nodes. In this paper, we propose a wireless solution based on the physical layer of IEEE 802.15.4 standard in the 2.4 GHz frequency band that enhances packet delivery ratio under an acceptable end-to-end delay threshold during all phases of the launching operation. The proposal is a multi-channel and multi-hop protocol that allows sensors that are deployed close to the interstage of the HLV to communicate with a multi-radio interface concentrator node. Simulation results show promising performance in terms of packet delivery rate and end-to-end delay.
机译：典型的新一代重型运载火箭（HLV）装有600多个传感器。这些传感器中有80％以上用于非关键的操作和技术数据。该数据被发送到地面发射控制器，使他们可以实时或事后监督有关HLV状态和发射操作进度的信息。传统上，传感器使用电缆连接到集中器实体。集中器是一个特殊的节点，负责收集由传感器生成的数据并将其传输到地面控制器单元。使用无线技术将传感器节点与集中器互连将使部署变得容易并且重量增加，这将有助于减少组装时间并获得发电量方面的收益。然而，现成的无线技术不能保证在分组传送率或端到端延迟方面的有线等效可靠性。实际上，当通过无线通信链路进行传输时，找到一种解决方案特别是在高数据速率情况下避免数据丢失的解决方案具有挑战性。这主要是由于无线介质的性质对周围环境非常敏感，并且由于不同的传感器节点可能同时对介质进行多次访问。在本文中，我们提出了一个基于IEEE 802.15.4标准物理层的2.4 GHz无线解决方案，该解决方案可以在启动操作的所有阶段中，在可接受的端到端延迟阈值下提高数据包的传输率。该提议是一种多通道和多跳协议，该协议允许部署在HLV中间级附近的传感器与多无线电接口集中器节点通信。仿真结果表明，在数据包传输速率和端到端延迟方面，性能令人鼓舞。

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