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Standards Subsctiption may be the perfect solution. These concerns are based on the phenomena where electronic circuitry fails to operate as intended i. As the voice of the U.
Already Subscribed to this document. Proceed to Checkout Continue Shopping. Generally, 2-D and 3-D computational models of the airframe up to the first electrical resonance are required. We have no amendments or corrections for this standard.
Add to Alert PDF. Please first verify your email before subscribing to alerts. An applicant may elect to establish an alternative zrp of compliance that is acceptable to the cognizant airworthiness authorities.
The information in this guide represents a collection of best engineering practices that have been used to certify aircraft HIRF protection. Need more than one copy?
HIRF Testing of Aircraft Systems
Early aircraft designs typically consisted of a series of cables, chains, cranks and various other mechanisms to operate the systems which made the aircraft fly. Models are required to estimate the level of influence ground plane coupling will have on low level swept current test results, especially where it is impractical to elevate the aircraft safely due to its size.
While this document is generally consistent with AC and draft HIRF AMJ, users of this document should verify that the guidance in this document is acceptable to the cognizant airworthiness authorities.
If the document is revised or amended, you will be notified by email.
You may delete a document from your Alert Profile at any time. Often times the aircraft size prohibits the use of conventional anechoic lined EMI test chambers and special permits are required for performing the testing process outdoors. Subscription pricing is determined by: Therefore, qrp need for EMI testing has never been more important for all commercial and military aircraft in use today.
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However, these changes give rise to myriad new concerns related to electromagnetic interference EMI of critical on-board 55583 systems. This standard is not included in any packages.
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Your Alert Profile lists the documents that will be monitored. HIRF Testing of Aircraft Systems April 5, Early aircraft designs typically consisted of a series of cables, chains, cranks and various other mechanisms to 553 the systems which made the aircraft fly. This requires several factors to be considered prior to testing such as the need for specialized high power test equipment, aircraft system instrumentation and flight emulation, RF hazards regarding fuel ignition and personnel exposure and adherence to national RF transmission rules and regulations.
Due to increasing advancements in the field of electronics over the last 60 years, mechanical flight control devices are being replaced or augmented with electronic circuitry for enhanced accuracy, reliability and, most of all, human safety.
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This approach is preferred over high level testing for its reduced RF exposure levels and RF hazard considerations. However, the Low level test requires a complex analytical modeling approach to ensure compliance. This process uses a direct drive method up to the first airframe electrical resonance, and a radiated field test methods above the first airframe resonance. This guide is neither mandatory nor regulatory in nature and does not constitute a regulation or legal interpretation of the regulation.
Please first log in with a verified 55583 before subscribing to alerts. High Level Tests are performed using peak and average field levels determined for one of three arl HIRF environments over 55583 test frequency range up to 18 GHz.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. This standard is also available to be included in Standards Subscriptions.