Accession Number : ADP005781

Title :   Advances in Flying Qualities: Concepts and Criteria for a Mission Oriented Flying Qualities Specification,

Corporate Author : SYSTEMS TECHNOLOGY INC HAWTHORNE CA

Personal Author(s) : Hoh, Roger H.

Report Date : MAY 1988

Pagination or Media Count : 28

Abstract : There has been considerable activity during the past 8 years to upgrade the military flying qualities specifications for conventional aircraft, as well as for V/STOLs and helicopters. The primary objectives of these upgrades has been to account for the use of high gain, high authority augmentation, and to more directly reflect the requirements of the intended mission into the specifications. The methodologies developed to accomplish the latter objective is summarized in the first part of this lecture. This is followed by a brief overview of the Lower Order Equivalent Systems and Bandwidth criteria. Problems with the specification of control sensitivity, and potential solutions are then discussed, followed by a brief presentation of the use of time vs frequency domain criteria. An empirical method to combine the Cooper-Harper Handling Qualities Ratings (HQRs) from each axis of control into an overall rating is then presented. Finally a proposed specification for precision flare and landing is given, followed by an example application of the method. (SDW)

Descriptors :   *FLIGHT CONTROL SYSTEMS, SPECIFICATIONS, MISSION PROFILES, VERTICAL TAKEOFF AIRCRAFT, SHORT TAKEOFF AIRCRAFT, HELICOPTERS.

Subject Categories : Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE