Investigation of control, display, and crew-loading requirements for helicopter instrument approach

Lebacqz, J. V.; Gerdes, R. M.; Forrest, R. D.; Merrill, Robert

doi:10.2514/6.1981-1820

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…From the late 1970s, large quantities of researches were conducted to evaluate PID-based feedback controllers with different levels of complexity and to investigate the influence of flight control methods on helicopter handling qualities [16][17][18]. Besides, the US Army initiated the Advanced Digital Optical Control System (ADOCS) program to investigate modern FCS concepts and conducted four simulations on Vertical Motion Simulator (VMS) from 1981 to 1985 [19,20].…”

Section: Pid-based Feedbackmentioning

confidence: 99%

Survey on Flight Control Technology for Large-Scale Helicopter

Jinshuo

2017

International Journal of Aerospace Engineering

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A literature review of flight control technology is presented for large-scale helicopter. Challenges of large-scale helicopter flight control system (FCS) design are illustrated. Following this, various flight control methodologies are described with respect to their engineering implementation and theoretical developments, whose advantages and disadvantages are also analyzed. Then, the challenging research issues on flight control technology are identified, and future directions are highlighted.

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Section: Pid-based Feedbackmentioning

confidence: 99%

Survey on Flight Control Technology for Large-Scale Helicopter

Jinshuo

2017

International Journal of Aerospace Engineering

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“…These commands, as well as the actual velocities, were then resolved into an aircraft-heading referenced vertical frame for presentation on the director needles. 14 The horizontal velocity command included a deceleration from 80 knots to 60 knots prior to glide-slope intercept, and a correction for wind to provide a constant airspeed for the approach; although done easily on the ground simulator (the "wind" is exactly known), in an actual aircraft a wind estimator and command procedure, as discussed in Ref. 8, would be required.…”

Section: Guidance and Display Characteristicsmentioning

confidence: 99%

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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A Summary of NASA/FAA Experiments Concerning Helicopter IFR Airworthiness Criteria

Lebacqz

Chen

Gerdes

et al. 1983

j am helicopter soc

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A sequence of ground-and flight-simulation experiments was conducled at the Ames Research Center as part of a joint NASA/FAA program to investiyate helicopter instrument-flieht-rules (IFR) airworthiness criteria. This paper describes the first six of these experiments and summarizes major results. Five of the experiments were conducled a n large-amplitude motion base simulators at Ames Research Center; the NASA-Army V/STOLAND UH-IH variable-stability helicopter was used in the flight experiment. Among the results shown for instrument operations are a requirement for some level of artificial stability and control, the adequacy of neutral longitudinal control position gradients, a limited advantage of including flight directors in the display, and the necessity for pitch and roll altitude stabilization to achieve ratings of satisfactory for the approach tasks considered.

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Investigation of control, display, and crew-loading requirements for helicopter instrument approach

Cited by 4 publications

References 1 publication

Survey on Flight Control Technology for Large-Scale Helicopter

Survey on Flight Control Technology for Large-Scale Helicopter

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

A Summary of NASA/FAA Experiments Concerning Helicopter IFR Airworthiness Criteria

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