Tilt Rotor Pitch/Flight-Path Handling Qualities

Cameron, Neil; Padfield, Gareth D.

doi:10.4050/jahs.55.042008

Cited by 10 publications

(9 citation statements)

References 8 publications

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“…This question was addressed in Ref. 22, developing the drop-back concept introduced by Gibson in Ref. 23.…”

Section: Flight-path Hqs In Airplane Modementioning

confidence: 99%

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Capturing requirements for tiltrotor handling qualities – case studies in virtual engineering

Padfield

2008

Aeronaut. j.

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Handling qualities are expressed as requirements at the interface of the pilot and the machine. In this way, the key functionality questions facing the design engineer are seen from the perspective of the interaction of the human pilot with the aircraft system and the environment in which it operates. In this paper, the author takes a ‘virtual engineering’ approach to handling qualities, emphasising the importance of conducting ‘requirements capture’ and preliminary design as an iterative process. When stretched capabilities are required, this approach minimises the risk to finding appropriate technology solutions, through developing explicit relationships between capability and design parameters, thus facilitating fully informed trade studies and predictions. Case studies from the development of a civil tiltrotor aircraft are presented that show how the difficult challenges facing the designer first need to be structured in terms of HQ predictions and assignments. This then provides the basis on which handling qualities improvements can be constructed within the multidisciplinary context of rotorcraft engineering.

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“…This question was addressed in Ref. 22, developing the drop-back concept introduced by Gibson in Ref. 23.…”

Section: Flight-path Hqs In Airplane Modementioning

confidence: 99%

“…Thirty six different configurations were considered, spanning the Level 1-2 ranges of CAP and values ofT  from zero to unity (22) . Three pilots participated in the simulation trials and based on the mean HQRs awarded the HQ boundaries appear as in Fig.…”

Section: Flight-path Hqs In Airplane Modementioning

confidence: 99%

Capturing requirements for tiltrotor handling qualities – case studies in virtual engineering

Padfield

2008

Aeronaut. j.

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“…In the follow-up research, the flight quality of the pitch channel was also analyzed, and the short-term response and bandwidth of airplane mode were analyzed correspondingly according to the MIL-STD-1797A flight quality specification (Padfield et al, 2006). Further, a new pitch/ flight-path handling qualities metric using the existing control anticipation parameter and a new pitch drop back parameter were developed for tilt-rotor aircraft (Cameron and Padfield, 2010). These results provided a theoretical basis for the analysis and optimization of tilt-rotor aircraft.…”

Section: Introductionmentioning

confidence: 99%

The investigation on flight quality of tilt-rotor aircraft

Lü¹,

Zhao²,

Ma³

et al. 2021

AEAT

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Purpose This paper aims to present an investigation on flight quality analysis and design of tilt-rotor aircraft combined with corresponding flight quality specifications. Design/methodology/approach From the perspective of modal characteristics of tilt-rotor aircraft, it focuses on the analysis of the change rules of the longitudinal short-term motion mode, lateral roll convergence mode, spiral mode and Dutch roll mode. Then, the flight quality design research is carried out using the explicit model tracking control method. The quantitative relationship between flight quality requirements and explicit model is established. Accordingly, the closed-loop flight quality of XV-15 tilt-rotor aircraft is evaluated. Findings The stability of spiral mode is the result of the interaction of various aerodynamic derivatives and spiral instability occurs in helicopter mode. The other motion modes are stable in full flight mode and meet the requirements of level 1 specified in ADS-33E-PRF and MIL-F-8785C flight quality specifications. There is a quantitative relationship between flight quality requirements and explicit model, and the flight quality of tilt-rotor aircraft is improved through the explicit model tracking control method. Practical implications The presented analysis results showed the influence of motion modes and flight quality and the effectiveness of explicit model tracking control method in flight quality improvement, which could be considered as new information for further flight quality design of tilt-rotor aircraft. Originality/value The originality of the paper lies in the proposed design and analysis method of the flight quality of tilt-rotor aircraft from the direction of the influence of its aerodynamic derivatives and motion modes.

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“…(Pavel & Padfield, 2003) derived a relation between CAP and Q  and (Padfield & Meyer, 2003;Cameron & Padfield, 2010) connected CAP to other flying qualities parameters. One of the reasons the attitude quickness criterion has gained large acceptance was due to its physical interpretation (in the limiting case gives the time constant of the aircraft as a function of the time constant of the maneuver).…”

Section: Agility Quickness Metric As a Measurement Of Performancementioning

confidence: 99%

Rotorcraft Design for Maximized Performance at Minimized Vibratory Loads

Pavel¹

2011

Aeronautics and Astronautics

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Tilt Rotor Pitch/Flight-Path Handling Qualities

Cited by 10 publications

References 8 publications

Capturing requirements for tiltrotor handling qualities – case studies in virtual engineering

Capturing requirements for tiltrotor handling qualities – case studies in virtual engineering

The investigation on flight quality of tilt-rotor aircraft

Rotorcraft Design for Maximized Performance at Minimized Vibratory Loads

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