Flight control design for alleviation of pilot workload during helicopter shipboard operations

Joseph Francis Horn, Derek O. Bridges, Dooyong Lee

Research output: Contribution to journalConference article

10 Citations (Scopus)

Abstract

A flight control design methodology for alleviating pilot workload during helicopter shipboard operations was developed and tested in simulation. The methodology uses modern MIMO control theory to improve gust rejection properties when operating in a turbulent ship airwake. The spectral properties of the airwake are identified using simulations and incorporated into the control synthesis process. The controller design is constrained to represent a limited authority SAS. Model order reduction methods are used to simply the control laws for practical implementation. The methodology was applied to design a modified SAS for the UH-60A operating over an LHA ship. The system was implemented in a high-fidelity simulation model and its performance was compared to that of the baseline SAS. Simulations were performed of the helicopter hovering in the turbulent airwake using a pilot model for two different wind-over-deck conditions. Results indicate that the modified SAS resulted in significantly lower control activity and angular motion of the aircraft. Advanced Rotorcraft Technology, Inc.

Original languageEnglish (US)
Pages (from-to)2032-2045
Number of pages14
JournalAnnual Forum Proceedings - AHS International
VolumeIII
StatePublished - Sep 14 2006
EventAHS Internaitonal 62nd Annual Forum - Phoenix, AZ, United States
Duration: May 9 2006May 11 2006

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Helicopters
Ships
Control theory
MIMO systems
Aircraft
Controllers

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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title = "Flight control design for alleviation of pilot workload during helicopter shipboard operations",
abstract = "A flight control design methodology for alleviating pilot workload during helicopter shipboard operations was developed and tested in simulation. The methodology uses modern MIMO control theory to improve gust rejection properties when operating in a turbulent ship airwake. The spectral properties of the airwake are identified using simulations and incorporated into the control synthesis process. The controller design is constrained to represent a limited authority SAS. Model order reduction methods are used to simply the control laws for practical implementation. The methodology was applied to design a modified SAS for the UH-60A operating over an LHA ship. The system was implemented in a high-fidelity simulation model and its performance was compared to that of the baseline SAS. Simulations were performed of the helicopter hovering in the turbulent airwake using a pilot model for two different wind-over-deck conditions. Results indicate that the modified SAS resulted in significantly lower control activity and angular motion of the aircraft. Advanced Rotorcraft Technology, Inc.",
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Flight control design for alleviation of pilot workload during helicopter shipboard operations. / Horn, Joseph Francis; Bridges, Derek O.; Lee, Dooyong.

In: Annual Forum Proceedings - AHS International, Vol. III, 14.09.2006, p. 2032-2045.

Research output: Contribution to journalConference article

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AU - Bridges, Derek O.

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AB - A flight control design methodology for alleviating pilot workload during helicopter shipboard operations was developed and tested in simulation. The methodology uses modern MIMO control theory to improve gust rejection properties when operating in a turbulent ship airwake. The spectral properties of the airwake are identified using simulations and incorporated into the control synthesis process. The controller design is constrained to represent a limited authority SAS. Model order reduction methods are used to simply the control laws for practical implementation. The methodology was applied to design a modified SAS for the UH-60A operating over an LHA ship. The system was implemented in a high-fidelity simulation model and its performance was compared to that of the baseline SAS. Simulations were performed of the helicopter hovering in the turbulent airwake using a pilot model for two different wind-over-deck conditions. Results indicate that the modified SAS resulted in significantly lower control activity and angular motion of the aircraft. Advanced Rotorcraft Technology, Inc.

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