Communications for Integrated Modular Avionics

Alena, Richard; Ossenfort, John; Laws, K.I.; Goforth, Andre; Figueroa, Fernando

doi:10.1109/aero.2007.352639

Cited by 50 publications

(21 citation statements)

References 4 publications

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“…5 Most are timings based on certain ZB protocol events, signaled by packets of certain types. Daintree Packet Analysis Tool's packet capture and decoding capability was used to evaluate items such as latency, latency variability, and failover behavior.…”

Section: Zigbee Fault Tolerance Testingmentioning

confidence: 99%

Fault tolerance in ZigBee wireless sensor networks

Alena

Gilstrap

Baldwin

et al. 2011

2011 Aerospace Conference

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Abstract-Wireless sensor networks (WSN) based on the IEEE 802.15.4 Personal Area Network standard are finding increasing use in the home automation and emerging smart energy markets. The network and application layers, based on the ZigBee 2007 PRO Standard, provide a convenient framework for component-based software that supports customer solutions from multiple vendors. This technology is supported by System-on-a-Chip solutions, resulting in extremely small and low-power nodes. The Wireless Connections in Space Project addresses the aerospace flight domain for both flight-critical and non-critical avionics. WSNs provide the inherent fault tolerance required for aerospace applications utilizing such technology. The team from Ames Research Center has developed techniques for assessing the fault tolerance of ZigBee WSNs challenged by radio frequency (RF) interference or WSN node failure. 1The ZigBee Network layer forms a mesh network capable of routing data around failed nodes. A two-tier ZigBee network is tested in the lab and various failures induced in sensor and router nodes, simulating realistic fault conditions. A ZigBee network analyzer is used to view the packet traffic and measure the response to these induced faults at the Network layer. Certain faults are induced using Radio Frequency (RF) interference or disruption of the Physical layer, so RF signal levels are monitored during the experiments. The speed at which an orphaned sensor node is detected and an alternative route formed is an important characteristic for fault-tolerant sensor networks. Our working definitions of metrics describing WSN fault tolerance are presented along with a summary of on-going test results from our development lab.A brief overview of ZigBee technology is presented along with RF measurement techniques designed to gauge susceptibility to interference caused by other transmitters such as wireless networks. Since 802.11 and 802.15.4 technology share the 2.4 GHz ISM band, spectrum management is used to ensure every network has a reasonably clear channel for communications. Quantitative RF characterization of the WSN is performed under varying duty cycle conditions to understand the effect of wireless networks and other interference sources on its performance. Furthermore, multipath interference caused by delayed reflections of RF signals is a significant issue, given that the WSN must run in confined metallic spaces, which produce 1 U.S. Government work not protected by U.S. copyright. IEEEAC Paper #1480, Version I, Updated December 9, 2010 high levels of reflected multipath RF energy. The results of RF characterization and interference testing of our prototype WSN in the lab are presented and summarized. The architecture and technical feasibility of creating a single fault-tolerant WSN for aerospace applications is introduced, based on our experimental findings.

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Section: Zigbee Fault Tolerance Testingmentioning

confidence: 99%

Fault tolerance in ZigBee wireless sensor networks

Alena

Gilstrap

Baldwin

et al. 2011

2011 Aerospace Conference

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“…In a real avionic system, all the components run completely asynchronously [5]: computer A and computer B clock are not synchronized. Thus, sampling of sensors and actuators command is correlated with A but not with B cycles.…”

Section: Virtual and Physical Test Platformsmentioning

confidence: 99%

Comprehensive Validation Platform for Complex Aircraft Avionics Systems

Favarcq¹,

Palluau²,

Sentier³

et al. 2013

Proceedings of the 2013 International Conference on Advanced Computer Science and Electronics Information

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-Since 10 years, aerospace industry is facing an unprecedented cycle time reduction driven by high competition between Aircraft manufacturers. To safely sustain such optimizations, virtual test is becoming essential in avionic development cycle. Modern aircraft validation techniques rely heavily on virtual test but integration of this activity in the validation process is still far from being optimal.The goal of this paper is to present a novel approach, in terms of process and technologies, to maximize reuse between virtual testing and more conventional system validation strategies for avionics systems.

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“…However, the paper points out that the safety of such technology still has to be proven before its introduction in commercial aircrafts. Despite the fact that several works have investigated the application of the IEEE 1451 standards in aerospace and aeronautical fields [12][13][14], fault tolerance aspects related to the implementation of an IEEE 1451-based smart transducer interface have not yet been fully addressed.…”

Section: Ieee 1451 Standardmentioning

confidence: 99%