Advancements in Lightning Test Services
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1 Advancements in Lightning Test Services
2 Presentation Overview Basic Lightning Concepts Indirect Effects Testing Waveforms General Test Methods Elite Testing Capability What s in place What s new
3 Lightning Test Overview
4 Standard Lightning Model Cloud to Ground Cloud to Cloud Intra-cloud Negative Flash Positive Flash Complex response measured on aircraft Aircraft studies Lightning is probabilistic and variable
5 Standard Lightning Model Naturally occurring leader originates at charge region Bidirectional Junction Leaders Originate at Aircraft Opposite Polarity Charge Region
6 Negative Lightning Flash Model
7 Lightning Effects Direct Effects (Physical Effects) Burning, Melting, Arcing, Blasting, Puncture Indirect Effects (Electromagnetic Effects) Aperture Coupling Structural IR Voltage
8 Direct Strike Current Waveforms
9 Multiple Stroke
10 Multiple Burst
11 Indirect Current Waveforms(3H) Indirect Multi-burst Waveform 3H
12 Aperture Coupling V Direct Strike Current Aperture
13 Indirect Current Waveforms Indirect Waveform 1 Direct Waveform 1 Magnetic fields generated by di/dt of Waveform 1 produce current and voltage indirect waveforms Indirect Waveform 2
14 Indirect Current Waveforms
15 Indirect Current Waveforms Waveform 4 Appears on conductors within shields due to the product of shield current and shield transfer impedance. Waveform 5 Long duration waveform appears on cables in more resistive CFC structures
16 Injection Methods
17 Injection Methods
18 Injection Methods
19 Elite s Lightning Testing How Does Elite Perform the Test Our present capabilities What s new
20 Elite Test Levels DO-160E Pin Injection RTCA DO 160E Table 22-2 Waveforms 3 (1MHz) 4 5A/5B Level Voc/Isc Voc/Isc Voc/Isc 1 100/4 50/10 50/ /10 124/25 125/ /24 300/60 300/ /60 750/ / / / /1600 Direct Coupled
21 Elite Test Levels DO-160E Cable Single Stroke RTCA DO 160E Table 22-3 Waveforms (1&10 MHz) 4 5A/5B Level V L /I T V T /I L V T /I L V T /I L V L /I T 1 50/100 50/ /20 50/100 50/ / / /50 125/ / / / / / / / / / / / / / / / /5000 Inductive Coupled Ground Injection
22 Elite Test Levels DO-160E Cable Multiple Stroke RTCA DO 160E Table 22-4 Waveforms (1&10 MHz) 4 5A/5B Level V L /I T V T /I L V T /I L V T /I L V L /I T First (L5) 1600/ / / / /2000 Subsequent (L5) 800/ / / / /1000 Inductive Coupler Ground Injection
23 Elite Test Levels DO-160E Multiple Burst RTCA DO 160E Table 22-2 Waveforms 3 (1&10 MHz) Level V T /I L 1 60/ / / / /32 Inductive Coupled
24 Elite s Lightning Testing Commercially Available Equipment Modify Existing Haefely Equipment Many Different Requirements Flexibility
25 Elite s Lightning Equipment DO160 Basic Unit Solid state switches and a 10,000V, 100kVA high voltage supply to produce the Single Stroke and Multiple Stroke pulses. The Multiple Stroke triggering patterns are produced with a Lecroy or Agilent arbitrary function generator. Waveform Plug-In. Resistive, inductive and capacitive (RLC) networks. Elite Built Lightning Generator
26 Elite s Lightning Equipment Elite Built Generator Plug in Modules
27 JSF & F22 Lightning Cable Single Stroke JSF Waveforms A/5B Level V L /I T V T /I L V T /I L V L /I T 1 50/100 50/100 50/100 50/ / / / / / / / / / / / / / / / /5000 Inductive Coupled Ground Injection F22 SS, MS, Burst Burst x 4usec Voltage Pulse
28 Elite s Lightning Equipment
29 Elite s Lightning Equipment LISNs To Support Equipment 3.3 Meter Interconnecting Bundles Secondary Voltage Loop Transient Injection Probe 1 Meter Power Leads Test Item Current Monitoring Probe 5 cm 5 cm Transient Generator Oscilloscope 100x Voltage Monitoring Probe Typical Cable Injection Lightning Induced Transient Setup
30 Elite s Lightning Equipment
31 Elite s Lightning Equipment LISNs 3.3 Meter Interconnecting Bundles To Support Equipment Secondary Voltage Loop Transient Injection Probe 1 Meter Power Leads Test Item Current Monitoring Probe 5 cm 5 cm Amplifier Arbitrary Waveform Generator Oscilloscope 100x Voltage Monitoring Probe Typical Multiple Burst Cable Injection Lightning Induced Transient Setup
32 Elite s Lightning Equipment
33 Elite s Lightning Equipment Elite Electronic Engineering has a vast number of coupling probes from many manufacturers. The probes are made of materials, such as oriented silicon steel and various permeability ferrites. Through extensive experimentation, each probe has been matched to the generator for producing the best possible waveform. Large cables can be accommodated with larger opening probes.
34 Elite s Specialty Lightning Equipment
35 What s Next Higher Amplitudes Waveform 6H? Automation
36 Elite s Lightning Test Capability Summary DO-160E Single Stroke, Multi-Stroke, Multi-Burst Waveforms 1-5, Levels 1-5 MIL-461E JSF CS-115, 116 Combination Waveform 1&2, 4&5A Specialty Pulse Requirements
37 Elite s Lightning Test Capability Reference SAE ARP 5412/13/14/15/16 RTCA DO-160E
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