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【范围】
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The aircraft landing gear is a complex multi-degree of freedom dynamic system, and may encounter vibration or dynamic
response problems induced by braking action. The vibratory modes can be induced by brake and tire-ground frictional
characteristics, antiskid operation, brake design features, landing gear design features, and tire characteristics. The
impact of this vibration can range from catastrophic failure of critical system components or entire landing gears, to
fatigue of small components, to passenger annoyance. It is therefore important that the vibration is assessed during the
design concept phase, and verified during the development and testing phases of the system hardware.
This SAE Aerospace Information Report (AIR) has been prepared by a panel of the A-5A Subcommittee to present an
overview of the landing gear problems associated with aircraft braking system dynamics, and the approaches to the
identification, diagnosis, and solution of these problems. All pertinent system modes of vibration are described. In
addition, facilities and techniques available for test and evaluation are presented and discussed, and useful references
are cited. The terminology used is intended to be consistent with AIR1489, “Aerospace Landing Gear Systems
Terminology", but some terminology herein is not yet included in AIR1489. The panel members include representatives
from major b ake, landing gear, aircraft, and brake control system manufacturers. In addition, drafts of the document
were circulated for input beyond the SAE to other experts in the field.strRefField
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