Transcription
The new MIL-STD-461G CS117vs. DO-160G, Section 22
Introduction Basic considerations Test requirements and test levels compared Calibration and test setup examples Roundup Conclusion
Introduction Lightning statistics (Boeing, Onera France): 54’900 events in 2013 Aircraft can be involved in a natural occurring lightning or trigger one
IntroductionSevere negative real flash to ground: Typically between 1 and 11 strokes, average: 3, max. strokes: 24 Total duration: 20 ms – 1 s, average duration: 200 ms
Introduction External idealized current components (time not to scale): a very popular diagram in literature
IntroductionDirect lightning effectsIndirect lightning effects Puncture Burning Melting, etc.Electromagnetic effects: Induced currents Induced voltageswww.eturbonews.com
Basic considerationsRTCA DO-160G Section 22MIL-STD-461G CS117 (new)Commercial aircraftComplete set of tests includedIn place for a long periodMilitary aircraft and surface navalshipsComplemented by other STDs like464Introduced in 2015, based on DO160GRTCA Radio Technical Commission for Aeronautics
Basic considerations Standardization
Test requirements comparedRTCA DO-160G Section 22MIL-STD-461G CS117 (new)EUT designationFive test levelsNo EUT designationTwo test levelsWF setTest typeWaveformsAPIN3, 4BPIN3, 5AL1: internal eq.L2: external eq.www.navy.mil
Test requirements comparedRTCA DO-160G Section 22MIL-STD-461G CS117 Pin injectionø No pin injection requirement Cable bundle Cable bundle
Test requirements comparedMIL-STD-461G CS117Why no pin injection requirement in MIL-STD-461G?MIL STD-464: There are two models, one for direct effects and another for indirect effects The model for indirect effects does not include pin injection
Test requirements comparedMIL-STD-461G CS117Only cable induction (CI) is used as injection method: no direct injection (PIN), no GIS22Pulse applicationCS117 Pin injection (PIN)ø Cable induction (CI) Ground Injection (GI)ø
Test requirements compared: signal typesMIL-STD-461G CS117Only Multiple Stroke (MS) and Multiple Burst (MB): no Single Stroke (SS)S22CS117 ø
Test requirements compared: waveformsMIL-STD-461G CS117All waveforms from S22 present, except WF5B WF1 WF4 WF2WF5 A/B WF3 only A WF6
Test requirements compared: applicability of testsMIL-STD-461G CS117Only MS and MB applicable: No CB single stroke (SS), no PIN testsS22Type n/aPIN WF1WF2WF3WF4WF5A/BWF6CS117SSno reqno reqyesyesWF5Ano reqøMSno requirementMB SignalCBn/aSSyesyesyesyesWF5Ano reqøMSyesyesyesyesWF5Ano req MBno reqno reqyesno reqno reqyes
Test requirements compared: Multiple Stroke (MS)FSSub.FSSub.FSSub.FSSub.FSSub.2/1VL / IT [V/A]50 / 5025 / 25125 / 12562.5 / 62.5300 / 300150 / 150750 / 750375 / 3751600 / 1600800 / 8002/1VT / IL [V/A]50 / 5025 / 25125 / 12562.5 / 62.5300 / 300150 / 150750 / 750375 / 3751600 / 1600800 / 800Waveforms3/3VT / IL [V/A]100 / 2050 / 10250 / 50125 / 25600 / 120300 / 601500 / 300750 / 1503200 / 6401600 / 320FSSub.FSSub.2/1VL / IT V/A]300 / 600150 / 150750 / 1500375 / 3752/1VT / IL [V/A]øøøø3/3VT / IL V/A]600 / 120300 / 601500 / 300750 / 150S22test levelL1L2L3L4L5CS117L1L24/1VT / IL [V/A]25 / 5012.5 / 2562.5 / 12531.25 / 62.5150 / 30075 / 150375 / 750187.5 / 375800 / 1600400 / 8004 / 5AVL / IT [V/A]20 / 6010 / 3050 / 16025 / 80120 / 40060 / 200300 / 800150 / 400640 / 2000320 / 10004/1VT / IL V/A]øøøø4 / 5AVL / IT [V/A]300 / 100075 / 200750 / 2000187.5 / 400
Test requirements compared: Multiple Burst (MB)S22test levelWaveforms3/36/6VT / IL [V/A]VL / IT [V/A]160 / 1100 / 52150 / 2.5250 / 12.53360 / 6600 / 304900 / 151500 / 7551920 / 323200 / 1603/36/6VT / IL [V/A]VL / IT [V/A]1360 / 6600 / 302900 / 151500 / 75CS117
Calibration and test setup examplesRTCA DO-160G Section 22: Pin injection WF4, L5, SS, voltage and current calibration
Calibration and test setup examplesRTCA DO-160G Section 22: Pin injection WF4, L5, SS, test setup
Calibration and test setup examplesRTCA DO-160G Section 22: Cable induction WF1, L5, MS, voltage and current calibration
Calibration and test setup examplesRTCA DO-160G Section 22: Cable induction WF1, L5, MS, test setup
Calibration and test setup examplesMIL-STD-461G CS117: Cable induction WF5A, MS , internal equipment, voltage and current calibration
Calibration and test setup examplesMIL-STD-461G CS117: Cable induction WF5A, MS, internal equipment, test setup
RoundupMIL-STD-461G CS117 test requirements: Represent only a part of DO-160G S22 test requirements Applies to military aicraft and surface ships The only injection method is cable induction No damage tests (pin injection) required No single stroke tests required
RoundupMIL-STD-461G CS117 test levels: Only two test levels MIL test levels are generally between L3 and L5 from S22 Not intended to address
ConclusionRTCA DO-160G Section 22 and MIL-STD-461G CS117 Are the requirements from analyzed standards the same?Yes and no Are the two standards similar?Up to a certaion extent
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RTCA DO-160G Section 22 Commercial aircraft Complete set of tests included In place for a long period MIL-STD-461G CS117 (new) Military aircraft and surface naval ships Complemented by other STDs like 464 Introduced in 2015, based on DO-160G RTCA Radio Technical Commission for Aeronautics
