Further Assessment of a Scalogram-Based PIO Metric using University of Liverpool Tilt Rotor Simulation Data

Cameron, Neil; White, Mark; Cunliffe, Christopher; Klyde, David H.; Mello, Ricardo S.

doi:10.2514/6.2018-1017

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Scalograms represent the spectrum of frequencies within the control input as a function of time. Later, the metric was successfully used to detect pilot induced oscillations within the flight and simulation test databases [24,25]. Moreover, Tritschler et al described the use of TFD methods to analyse the pilot control activity for an OH-58C Kiowa helicopter performing the pirouette MTE [12].…”

Section: Objective Compensation Measures: Backgroundmentioning

confidence: 99%

Helicopter Handling Qualities: A study in pilot control compensation

et al. 2021

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The research reported in this paper is aimed at the development of a metric to quantify and predict the extent of pilot control compensation required to fly a wide range of mission task elements. To do this, the utility of a range of time- and frequency-domain measures to examine pilot control activity whilst flying hover/low-speed and forward flight tasks are explored. The tasks were performed by two test pilots using both the National Research Council (Canada)’s Bell 412 Advanced Systems Research Aircraft and the University of Liverpool’s HELIFLIGHT-R simulator. Handling qualities ratings were awarded for each of the tasks and compared with a newly developed weighted adaptive control compensation metric based on discrete pilot inputs, showing good correlation. Moreover, in combination with a time-varying frequency-domain exposure, the proposed metric is shown to be useful for understanding the relationship between the pilot’s subjective assessment, measured control activity and task performance. By collating the results from the subjective and objective metrics for a range of different mission task elements, compensation boundaries are proposed to predict and verify the subjective assessments from the Cooper-Harper Handling Qualities Rating scale.

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Section: Objective Compensation Measures: Backgroundmentioning

confidence: 99%

Helicopter Handling Qualities: A study in pilot control compensation

et al. 2021

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“…Examples of research efforts in the field regarding RPCs include high fidelity modelling of aeroelastic couplings ( [9,10]), identification of pilot biodynamics and models ( [11][12][13]), development of prediction and detection tools ( [14,15]) and development of design guidelines ( [16,17]). The research effort described in this paper concerns procedures and methods to ensure that PIO tendencies are exposed during test and evaluation efforts and not during operations.…”

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confidence: 99%

In-Flight Test Campaign to Validate PIO Detection and Assessment Tools

et al. 2020

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This paper describes a joint research campaign conducted by the German Aerospace Center (DLR) and the National Research Council Canada (NRC) to explore methods and techniques to expose rotorcraft pilot-induced oscillations (PIOs) during flight testing. A flight test campaign was conducted at NRC using the Bell 205 experimental aircraft. Results show that, particularly for the lateral axis, ADS-33 tasks can be successfully applied to expose PIO tendencies. Novel subjective and objective criteria were used during the test campaign. PIO prediction boundaries of the objective phase-aggression criteria (PAC) detection algorithm were validated through results obtained. This was the first use of PAC with data recorded in-flight. To collect subjective feedback, the aircraft–pilot coupling (APC) scale was used. This was the first use of the novel scale in-flight and received favourable feedback from the evaluation pilot. Modifications to ADS-33 mission tasks were found to successfully improve the ability to consistently expose PIOs.

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Further Assessment of a Scalogram-Based PIO Metric using University of Liverpool Tilt Rotor Simulation Data

Cited by 2 publications

References 8 publications

Helicopter Handling Qualities: A study in pilot control compensation

Helicopter Handling Qualities: A study in pilot control compensation

In-Flight Test Campaign to Validate PIO Detection and Assessment Tools

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