@inproceedings{6386ed356c7e4438846c8cff134135c7,
title = "New longitudinal handling qualities criterion for unstable hypersonic vehicles",
abstract = "This paper presents results of a joint research program of NASA Dryden Flight Research Center and the Institute of Flight Mechanics and Control of Technische Universit{\"a}t M{\"u}nchen on hypersonic longitudinal long-term dynamics. The peculiarities of hypersonic flight dynamics as well as approximations for eigenvalues and transfer functions are described. The flight simulator which is used for the evaluation and a head up display customized for hypersonic cruise flight will be presented. A special piloting technique to compensate path-attitude lag is described. Pilot ratings for longitudinal long-term dynamic handling qualities of different phugoid and height mode instabilities including combined ones, are presented. Further the strong influence of engine time lag on handling qualities is described. Pilot models for stable closed loop dynamics concerning feedback of vertical speed to elevator and airspeed to throttle are presented. With reference to the maximum stable crossover frequency and the exponent of the most unstable eigenvalue a new handling qualities criterion for unstable longitudinal long-term dynamics is presented",
author = "R. Stich and G. Sachs and Tim Cox",
year = "2003",
doi = "10.2514/6.2003-5309",
language = "English",
isbn = "9781563479458",
series = "AIAA Atmospheric Flight Mechanics Conference and Exhibit",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
booktitle = "AIAA Atmospheric Flight Mechanics Conference and Exhibit",
note = "AIAA Atmospheric Flight Mechanics Conference and Exhibit 2003 ; Conference date: 11-08-2003 Through 14-08-2003",
}