EUROCAE ED-84 PDF

The quantified environment and levels herein represent the minimum currently required by certifying authorities, consistent with the approach applied in related lightning documents. Lightning, like other weather phenomenon, is probabilistic in nature. Levels and waveforms vary considerably from one flash to the next. Within this document, standardized voltage and current waveforms have been derived to represent the lightning environment external to an aircraft. These standardized waveforms are used to assess the effects of lightning on aircraft. The standardized external current waveforms have in turn been used to derive standardized transient voltage and current test waveforms that can be expected to appear on cable bundles and at equipment interfaces within an aircraft.

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The quantified environment and levels herein represent the minimum currently required by certifying authorities, consistent with the approach applied in related lightning documents. Lightning, like other weather phenomenon, is probabilistic in nature. Levels and waveforms vary considerably from one flash to the next.

Within this document, standardized voltage and current waveforms have been derived to represent the lightning environment external to an aircraft.

These standardized waveforms are used to assess the effects of lightning on aircraft. The standardized external current waveforms have in turn been used to derive standardized transient voltage and current test waveforms that can be expected to appear on cable bundles and at equipment interfaces within an aircraft.

When deriving these latter internal induced test waveforms, considerations such as testability and important waveform characteristics that can demonstrate lightning design effectiveness, have been taken into account. The parameters of the standardized waveforms, both external and derived internal induced transients, represent severe versions of each of the characteristics of natural lightning flashes and include all parameters of interest with respect to lightning protection for aircraft.

These standardized waveforms are thus referred to as idealized standard lightning environment waveforms, idealized standard waveforms, or just idealized waveforms within this document.

The waveforms associated with the external environment are termed, the idealized standard external lightning environment. The waveforms associated with the internal induced environment are termed the idealized standard induced transient waveforms. In every case more severe versions of each of the individual characteristics of the idealized standard external lightning environment waveforms have been recorded in natural lightning flashes.

The more severe individual characteristics of the idealized standard external lightning environment waveforms have never been recorded together within a single lightning flash. Therefore the parameters combined in the idealized standard lightning environment waveforms provided in this document represent a very severe environment. These characteristics are referred to as the aircraft lightning environment.

The relationship between the environment, zoning, and testing, along with the associated document number, is depicted in Figure 1.

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EUROCAE ED 84

Faegar You have no items in your shopping cart. Thanks to the experience and expertise matured over more than 30 years of activities, IDS offers high tech integrated solutions and services to perform control and design activities covering any of the above eurodae Electromagnetic Environmental Effects E3 phenomena. GALILEO has a comprehensive set of processing functions and working procedures to efficiently and effectively address these problems. This scalable approach results in reduced design costs and time to market.

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EUROCAE ED-84 PDF

Kagashicage Huge banks of capacitors store the charge, which is then released to simulate a lightning strike. This approach can significantly reduce the risk of failure in the certification process and minimize the expensive and time consuming test activities that are required by international regulations. Electromagnetic Environmental Effects E3 Aircraft and space vehicle engineering This procedure is able to model the effects of composite and other lightweight materials that are not good conductors, especially at very low frequencies Professional post-processing procedures that allow easy and immediate identification of potential risks at equipment terminals for any of the lightning waveforms defined in the applicable normatives EUROCAE EDA and EUROCAE ED This approach can significantly reduce the risk of failure in the certification process and minimize the expensive and time consuming test activities that are required by international regulations. For this reason, proper protection against the indirect effects of lightning has to be designed, especially in the case of safety critical systems.

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