Control Position Gradient and Stability/Control Augmentation Effects on Helicopter Handling Qualities for Instrument Approach

Lebacqz, J. V.; Forrest, R. D.

doi:10.4050/jahs.27.35

Cited by 2 publications

(2 citation statements)

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“…The influence of a neutral lateral static stability was shown in the previous experiment to be minor. 6 These baseline characteristics were retained for all the control system designs.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…5 - 6 Cooper-Harper pilot rating (CHPR) results indicated 1) the need for some level of SCAS above the bare airframe to ensure a level of adequate performance with tolerable workload (CHPR<6.5), 5 2) the requirement for attitude augmentation in pitch and roll to obtain a level of satisfactory (CHPR<3.5), 5 > 6 and 3) the acceptability of neutral longitudinal and lateral static stabilities. 6 Because these data were obtained in an experimental environment that did not require auxiliary tasks, these results are applicable only to dual-pilot crew-loading situation. Further, because the proposed IFR Appendix does not consider the influence of displays, only raw data error displays were examined.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Investigation of Control, Display, and Crew-Loading Requirements for Helicopter Instrument Approach

Lebacqz¹,

Gerdes²,

Forrest³

et al. 1981

Journal of Guidance and Control

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A ground simulation experiment was conducted on the Ames Research Center Flight Simulator for AdvancedAircraft to investigate the influence and interaction of flight-control system, flight-director display, and crewloading situation on helicopter flying qualities during terminal-area operations in instrument conditions. Six levels of control complexity, ranging from angular rate damping to velocity-augmented longitudinal and vertical axes, were implemented on a representative helicopter model. The six levels of augmentation were examined with display variations consisting of raw elevation and azimuth data only and of raw data plus one-, two-, and threecue flight directors. Crew-loading situations simulated for the control-display combinations were dual-pilot operation (full attention available for control), and single-pilot operation (representative auxiliary tasks of navigation, communications, and decisionmaking). Four pilots performed a total of 150 evaluations of combinations of these parameters for a representative microwave landing system (MLS) approach task. Pilot rating results indicated the existence of a control display trade-off for ratings of satisfactory, whereas ratings of adequate-but-unsatisfactory depended primarily on the control system; the control system required for ratings of adequate-but-unsatisfactory was clearly more complex for the single-pilot situation than that for the dualpilot situation.

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“…The influence of a neutral lateral static stability was shown in the previous experiment to be minor. 6 These baseline characteristics were retained for all the control system designs.…”

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%