Assessment of a Scalogram-Based PIO Metric with Flight Test and Simulation Data

Klyde, David H, Schulz, Chase P, Souza Ferreira de Mello, Ricardo, Mitchell, David G, Cameron, Neil, Cunliffe, Christopher and White, MD ORCID: 0000-0002-8611-9525 (2020) Assessment of a Scalogram-Based PIO Metric with Flight Test and Simulation Data. Journal of Guidance, Control, and Dynamics: devoted to the technology of dynamics and control.

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Abstract

The mode transitions, envelope limiting, and control surface rate and position saturation that can accompany fly-by-wire designs may lead to pilot-vehicle system loss of control in the form of pilot-induced oscillations (PIO). With most fly-by-wire designs, the PIO tendencies have surfaced in flight test allowing for modifications that can reduce these tendencies. While predictive PIO metrics are available, though more work in this area is still needed, control room monitoring metrics have not been widely used. This paper proposes a wavelet scalogram-based metric that considers the time-varying peak pilot input power as a function of the controlled element phase at the frequency of the peak power, all of which are elements of the defined PIO signature. A flight test database generated in the evaluation of the Smart-Cue/Smart-Gain PIO mitigation concept is first used to assess the utility of the proposed approach. Further independent evaluation and validation using a previously unassessed aircraft configuration and evaluation maneuvers is made using data generated from Pilot-in-the-Loop simulations of the XV-15 at the University of Liverpool’s Heliflight simulation facility. The results of the assessments found that the new metric was successful at identifying correctly both PIO and non-PIO cases.

Item Type:	Article
Uncontrolled Keywords:	PIO, Scalogram, XV-15, Heliflight, Flight simulation
Depositing User:	Symplectic Admin
Date Deposited:	08 Oct 2019 09:54
Last Modified:	19 Jan 2023 00:24
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3057146

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• Assessment of a Scalogram-Based PIO Metric with Flight Test and Simulation Data. (deposited 08 Oct 2019 09:54) [Currently Displayed]
  • Assessment of a Scalogram-Based Pilot-Induced Oscillation Metric with Flight-Test and Simulation Data double dagger double dagger. (deposited 05 Oct 2020 07:44)