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原文传递 Analysis of Aircraft Touchdown Point and the Associated Uncertainty.

题名：	Analysis of Aircraft Touchdown Point and the Associated Uncertainty.
作者：	ouyang, m. hackler, l. cheng, a.
关键词：	aircraft landing,touchdown,uncertainty,landing performance/global positioning systems, terminals, safety operations, landing trace, flight simulators, airport configuration, landing aids/
摘要：	Adequate determination of aircraft landing distance is critical to the safety of terminal area operations. In general, the aircraft landing process consists of the touchdown and rollout/turnoff. Although the current aviation system tracks a number of landing parameters for commercial operations, the operational touchdown performance is not readily measured and recorded. The research described herein collected landing traces from a flight simulator, analyzed the traces, and developed and validated computational methods that can backcalculate the touchdown points. The accuracy of the calculation was verified against high-precision Global Positioning System information. These computational methods are implemented in the MATLAB script language, and they are very efficient. MATLAB provides interfaces to all commonly used database systems, including Microsoft Access. Thus, these methods can be readily incorporated in an integral system to process large amounts of operational landing data. / NOTE: Final rept. / Supplementary Notes: Prepared in cooperation with William J. Hughes Technical Center, Atlantic City, NJ. Airport and Aircraft Safety Research and Development. and Hi-Tec Systems, Inc., Egg Harbor Township, NJ. Sponsored by Federal Aviation Administration, Washington, DC. Aviation Research and Development. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
报告类型：	科技报告