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首页> 外文会议>Annual international symposium of the Society of Flight Test Engineers >TRYING TO PLAY A CD ON A RECORD PLAYER: TESTING A DIGITAL UPGRADE TO THE A-10 ANALOG FUEL QUANTITY SYSTEM
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TRYING TO PLAY A CD ON A RECORD PLAYER: TESTING A DIGITAL UPGRADE TO THE A-10 ANALOG FUEL QUANTITY SYSTEM

机译：试图在唱片播放器上播放CD：测试数字升级到A-10模拟燃料量系统

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The Digital Fuel Quantity Intermediate Device (DFQID) is a Line Replaceable Unit (LRU) for the A-10C. It converts capacitance signals from the fuel probes inside the fuel tanks into a voltage signal read by the fuel indicator in the cockpit. The DFQID is designed to be an upgraded digital replacement for the obsolete analog Fuel Quantity Intermediate Device (FQID); equipment projected to be unsupportable beyond 2017. After design and manufacture, DFQIDs were fielded in 2004 bypassing standard developmental and operational testing. Inaccurate and unreliable fuel indications prevailed during the mainstay of DFQIDs fielding. The A-10 System Program Office (SPO) halted distribution of the DFQIDs in favor of utilizing remaining analog FQIDs. The test team at the 40th Flight Test Squadron (40 FLTS) was tasked by the A-10 SPO with testing the DFQID to characterize its performance. Intermittent failures observed during the onset of testing prompted the test team to reevaluate their test approach to isolate the contributing factor. Quality control, aging aircraft wiring, and environmental factors were all suspect. Conducting a test that fully incorporated these factors proved to be a nontrivial task. Testing encompassed 11 months to include 2 flight tests and over 30 ground tests. This led to the conclusion that humidity and moisture penetrated the outer casing of the DFQID into its circuitry causing it to misinterpret capacitance signals from the fuel probes and subsequently send an inaccurate voltage signal to the fuel indicator. As a result of testing, the DFQID is currently undergoing modification to properly seal the internal components to allow for further testing to be completed.
机译：数字燃料量中间装置（DFQID）是A-10C的可更换单元（LRU）。它将来自燃料箱内的燃料探针的电容信号转换为驾驶舱中燃料指示器读取的电压信号。 DFQID旨在成为过时模拟燃料量中间装置（FQID）的升级数字替代品;预计超越2017年以后的设备。设计和制造后，DFQID在2004年绕过标准的发展和运营测试。在DFQIDS Fielding的主干期间，不准确和不可靠的燃料指示占上风。 A-10系统计划办公室（SPO）停止了DFQID的分布，支持利用剩余的模拟FQID。第40架飞行试验中队（40 FLTS）的测试团队由A-10 SPO任务，测试DFQID以表征其性能。在测试开始期间观察到的间歇性故障促使测试团队重新评估其测试方法来隔离贡献因素。质量控制，老化飞机布线和环境因素都是怀疑。进行完全纳入这些因素的测试被证明是一个非活动任务。测试包括11个月，包括2个飞行试验和超过30个地面测试。这导致了结论，湿度和水分穿透了DFQID的外壳进入其电路，导致它来自燃料探针的误解电容信号，随后向燃料指示器发送不准确的电压信号。由于测试的结果，DFQID目前正在进行修改以正确密封内部组件以允许进一步测试完成。

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