Criteria for Low-Speed Longitudinal Handling Qualities
Criteria for Low-Speed Longitudinal Handling Qualities

Author: H.A. Mooij

Publisher: Springer Science & Business Media

Published: 2013-04-18

Total Pages: 151

ISBN-13: 9401711933

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In-fl ight simulation experiments performed in 1967 with a variable-stabil ity aircraft during the author's stay at Princeton University, motivated the study of handl ing characteristics of future transport aircraft with closed-loop fl ight control systems. In 1972, the first experiment took place at the National Aerospace Laboratory NLR, using one of its research aircraft. In anticipation of expected developments in (digital) fl ight control technology, the research programme following the first experiments was aimed at the establ ishment of quantitative handl ing qual ities criteria. An appreciable part of that programme has been sponsored by the Netherlands Agency for Aerospace Programs (Nederlands Instituut voor VI iegtuigontwikkel ing en Ruimtevaart) and the Department of Civil Aviation of the Netherlands (Rijksluchtvaartdienst). In 1981, a thorough review of the extensive and valuable data gathered was started. The result, presented in this book, was also included in the author's thesis for a Ph.D. degree of the Delft University of Technology. To introduce the reader to the multi-discipl inary field of handl ing qual ities research, introductory chapters are presented on longitudinal aircraft dynamics, closed-loop fl ight control systems using non-mechanical signal transmission, human pilot dynamics, hand I ing qual ities assessment techniques, and the present status of handl ing qual ity criteria.

Low-Speed Longitudinal Flying Qualities of Modern Transport Aircraft
Low-Speed Longitudinal Flying Qualities of Modern Transport Aircraft

Author: H. A. Mooij

Publisher:

Published: 1988

Total Pages: 16

ISBN-13:

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The suitability of an aircraft with respect to human control is determined by its so-called handling qualities. In modern transport aircraft the handling qualities are determined to a high degree by the flight control system. An introduction to the following aspects of closed-loop flight control systems for modern transport aircraft is given: stabilization and manoeuvring functions, candidate implementation forms, (mini-size) manipulators for flight control, and mathematical representations of the airframe/flight control system combination required for prediction and evaluation purposes. Regarding criteria for good handling qualities of transport aircraft the 'terminal flight phases' (take-off, initial climb, final approach and landing) are of prime interest. A treatise on a number of promising quantitative criteria for transport aircraft equipped with advanced flight control systems is given. Two groups of criteria are distinguished: criteria based on the dynamic characteristics of the aircraft alone (six criteria) and criteria based on the dynamic characteristics of the pilot/aircraft closed-loop system (two criteria). In the latter case a quasi-linear describing function for the human controller behaviour is used. (SDW).

Aviation Safety and Pilot Control
Aviation Safety and Pilot Control

Author: National Research Council

Publisher: National Academies Press

Published: 1997-03-28

Total Pages: 221

ISBN-13: 0309056888

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Adverse aircraft-pilot coupling (APC) events include a broad set of undesirable and sometimes hazardous phenomena that originate in anomalous interactions between pilots and aircraft. As civil and military aircraft technologies advance, interactions between pilots and aircraft are becoming more complex. Recent accidents and other incidents have been attributed to adverse APC in military aircraft. In addition, APC has been implicated in some civilian incidents. This book evaluates the current state of knowledge about adverse APC and processes that may be used to eliminate it from military and commercial aircraft. It was written for technical, government, and administrative decisionmakers and their technical and administrative support staffs; key technical managers in the aircraft manufacturing and operational industries; stability and control engineers; aircraft flight control system designers; research specialists in flight control, flying qualities, human factors; and technically knowledgeable lay readers.

Initial VTOL Flight Control Design Criteria Development - Discussion of Selected Handling Qualities Topics
Initial VTOL Flight Control Design Criteria Development - Discussion of Selected Handling Qualities Topics

Author: John Kroll (Jr.)

Publisher:

Published: 1968

Total Pages: 76

ISBN-13:

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"This report presents a series of discussions on selected topics related to the development of VTOL flying qualities criteria. The topics were chosen on the basis of their importance to flying qualities and the potential significance to the Air Force VTOL Integrated Flight Control System (VIFCS) program. The treatment given to the selected topics was aimed at identifying those areas that require further study and research within the scope of the VIFCS program. -- page iii.

Longitudinal Handling Qualities for Hovering
Longitudinal Handling Qualities for Hovering

Author: E. Seckel

Publisher:

Published: 1961

Total Pages: 74

ISBN-13:

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Flight tests with a variable stability helicopter were conducted to determine the effect of certain stability parameters on precision hovering in atmospheric turbulence. A course was devised to emphasize the precision control required to pick up sling loads, deliver litter patients, dunk Sonar buoys, Etc., under gusty conditions. The effect of velocity stability was determined to be of particular importance. The most important effect is that the pitching disturbances felt by the pilot due to turbulence are essentially proportional to this parameter. Secondary effects are the control gradient for trim at low speed, and the dynamic stability. The range of velocity stability variation was from practically zero, which was considered very favorable, to values that were unacceptable or even disastrous. Certain pilot ratings did not correspond to previously published handling qualities criteria. Investigation disclosed that higher angular damping and greater control effectiveness are desired by pilots for precision hovering than had been determined. (Author).