Application of Frequency Domain Handling Qualities Criteria to the Longitudinal Landing Task

Sarrafian, Shahan K. and Powers, Bruce G. (1985) Application of Frequency Domain Handling Qualities Criteria to the Longitudinal Landing Task. Technical Report NASA TM-86728, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

Under NASA sponsorship, an in-flight simulation of the longitudinal handling qualities of several configurations for the approach and landing task was performed on the USAF/AFWAL Total In-Flight Simulator by the Calspan Corporation. The basic configuration was a generic transport airplane with static instability. The control laws included proportional plus integral gain loops to produce pitch-rate and angle-of-attack feedback loops. The evaluation task was a conventional visual approach to a flared touchdown at a designated spot on the runway with a lateral offset. The general conclusions were that the existing criteria are based on pitch-attitude response and that these characteristics do not adequately discriminate between the good and bad configurations of this study. This paper describes the work that has been done to further develop frequency-based criteria in an effort to provide better correlation with the observed data.

EPrint Type:	NASA Technical Memorandum
Keywords:	Control systems, Generic transport airplane, Handling qualities, Landing task
Subjects:	Aircraft/Project: Nonaircraft-specific (01 - 09) Aeronautics: (08) Aircraft Stability And Control
ID Code:	574
Deposited On:	30 January 2006
Additional Information:	15 pages. Prepared as AIAA Paper 85-1848 for presentation at the AIAA Guidance, Navigation, and Control Conference, Snowmass, Colorado, August 19–21, 1985.