Initial results of an in-flight investigation of longitudinal flyingqualities for augmented, large transports in approach and landing

Rossitto, Ken; Hodgkinson, J.; Williams, Todd D.; Leggett, Dave; Bailey, Randall E.; Ohmit, Eric

doi:10.2514/6.1993-3816

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A generic control anticipation parameter for aircraft handling qualities evaluation

Gautrey

Cook

1998

Aeronaut. j.

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The established control anticipation parameter longitudinal handling qualities criterion is based on the assumption that the short term dynamic response of the aeroplane is classical, or second-order-like. Modern fly-by-wire aircraft often have longitudinal short term dynamics which are not second-order-like and to which it is difficult to apply the criterion. This paper presents a proposed generic control anticipation parameter which is a modified version of the control anticipation parameter and which may be applicable to both unaugmented and augmented aircraft of all types. The appropriateness of the modified criterion was illustrated by designing a number of command and stability augmentation control laws, constrained to meet the criterion, for application to a medium weight fly-by-wire civil transport aircraft. The handling characteristics conferred by the control laws were assessed in a series of flight simulator trials, the results of which are briefly presented.

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