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  • 1
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    A flight-path-overshoot flying qualities metric for the landing task (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: Journal of Guidance, Control, and Dynamics (ISSN 0731-5090); 9; 609-613
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    In-flight evaluation of incremental time delays in pitch and roll (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: Journal of Guidance, Control, and Dynamics (ISSN 0731-5090); 9; 573-577
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Flying qualities - A costly lapse in flight-control design (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Generic problems in advanced aircraft with advanced control systems which suffer from control sensitivity, sluggish response, and pilot-induced oscillation tendencies are examined, with a view to improving techniques for eliminating the problems in the design phase. Results of two NASA and NASA/AIAA workshops reached a consensus that flying qualities criteria do not match control system development, control system designers are not relying on past experience in their field, ground-based simulation is relied on too heavily, and communications between flying qualities and control systems engineers need improvement. A summation is offered in that hardware and software have outstripped the pilot's capacity to use the capabilities which new aircraft offer. The flying qualities data base is stressed to be dynamic, and continually redefining the man/machine relationships.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: Astronautics and Aeronautics; 20; Apr. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    National aerospace plane longitudinal long-period dynamics (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: Journal of Guidance, Control, and Dynamics (ISSN 0731-5090); 14; 205
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Handling qualities aspects of NASA YF-12 flight experience (1976)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The handling qualities of the YF-12 airplane as observed during NASA research flights over the past five years were reviewed. Aircraft behavior during takeoff, acceleration, climb, cruise, descent, and landing are discussed. Pilot comments on the various flight phases and tasks are presented. Handling qualities parameters such as period, damping, amplitude ratios, roll-yaw coupling, and flight path response sensitivity are compared to existing and proposed handling qualities criteria. The influence of the propulsion systems, stability augmentation, autopilot systems, atmospheric gusts, and temperature changes are also discussed. YF-12 experience correlates well with flying qualities criteria, except for longitudinal short period damping, where existing and proposed criteria appear to be more stringent than necessary.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: Proc. of the SCAR Conf., Part 1; p 193-214
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Validation of a new flying quality criterion for the landing task (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A strong correlation has been found to exist between flight path angle peak overshoot and pilot ratings for the landing task. The use of flight path overshoot as a flying quality metric for landing is validated by correlation with four different in-flight simulation programs and a ground simulation study. Configurations tested were primarily medium-weight generic transports. As a result of good correlation with this extensive data base, criterion boundaries are proposed for landing based on the flight path peak overshoot metric.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: AIAA PAPER 86-2126
    Format: text
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  • 7
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    Comparison of pilot effective time delay for cockpit controllers used on space shuttle and conventional aircraft (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A study was conducted at the Dryden Flight Research Facility of NASA Ames Research Center (Ames-Dryden) to compare pilot effective time delay for the space shuttle rotational hand controller with that for conventional stick controllers. The space shuttle controller has three degrees of freedom and nonlinear gearing. The conventional stick has two degrees of freedom and linear gearing. Two spring constants were used, allowing the conventional stick to be evaluated in both a light and a heavy configuration. Pilot effective time delay was obtained separately for pitch and roll through first-order, closed-loop, compensatory tracking tasks. The tasks were implemented through the space shuttle cockpit simulator and a critical task tester device. A total of 900 data runs were made using four test pilots and one nonpilot (engineer) for two system delays in pitch and roll modes. Results showed that the heavier conventional control stick had the lowest pilot effective time delays. The light conventional control stick had pilot effective time delays similar to those of the shuttle controller. All configurations showed an increase in pilot effective time delay with an increase in total system delay.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TM-86030 , H-1222 , NAS 1.15:86030
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    A flightpath overshoot flying qualities metric for the landing task (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: An analysis was conducted of the attitude and flightpath angle response of configurations used in the Total In-Flight Simulator (TIFS) pitch-rate command systems program. The resutls show poor correlation between pilot ratings and attitude response and indicate that attitude was not a major influence in the results. A strong correlation was found to exist, however, between the amount of fightpath angle peak overshoot and the pilot ratings. This correlation is similar to the best correlations that have been obtained in recent closed-loop and time-domain analyses but has the advantage of greatly simplified implementation and interpretation.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: AIAA PAPER 86-0334
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Flying qualities criteria for superaugmented aircraft (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: An overview of Dryden superaugmented aircraft flying qualities research is presented. This includes F-8 digital fly by wire flight experiments, orbiter flying qualities, shuttle improvements, AFTI/F-16, flying qualities and control system alternatives, Vertical Motion Simulator Shuttle evaluation and Total in Flight Simulator pitch rate criteria.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA. Langley Research Center NASA Aircraft Controls Research, 1983; p 25-36
    Format: application/pdf
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  • 10
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    In-flight evaluation of pure time delays in pitch and roll (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An in-flight investigation of the effect of pure time delays in pitch and roll was undertaken. The evaluation tasks consisted of low lift-to-drag-ratio landings of various levels of difficulty and formation flying. The results indicate that the effect of time delay is strongly dependent on the task. In the pitch axis, in calm air, spot landings from a lateral offset were most strongly influenced by time delay. In the roll axis, in calm air, formation flying was most strongly influenced by time delay. However, when landings were made in turbulence, flying qualities in pitch were only slightly degraded, whereas in roll they were severely degraded.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TM-86744 , H-1308 , NAS 1.15:86744
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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