Title page for ETD etd-05092007-101154


Type of Document Master's Thesis
Author Sherman, Brook W
URN etd-05092007-101154
Title The Examination and Evaluation of Dynamic Ship Quiescence Prediction and Detection Methods for Application in the Ship-Helicopter Dynamic Interface
Degree Master of Science
Department Aerospace and Ocean Engineering
Advisory Committee
Advisor Name Title
McCue-Weil, Leigh S. Committee Chair
Brown, Alan J. Committee Member
Milgram, Judah Committee Member
Rahmandad, Hazhir Committee Member
Keywords
  • dynamic deck motion limit
  • landing period indicator
  • quiescence
Date of Defense 2007-04-16
Availability unrestricted
Abstract
Motion sensitive operations at sea are conducted in an unpredictable environment. While occasionally these operations can be planned around suitable weather forecast or delayed until smoother motions are apparent, naval ships conducting flight operations may have little liberty in their mission planning and execution. Tools exist to translate the ocean’s harsh conditions into discretely defined low motion operational periods. Particularly of interest, the identification of discrete lull periods or quiescence for shipboard helicopter operations can be better defined using a landing period indicator than with the current method of utilizing static deck angle measurements. While few of these systems exist, assessing their operational benefits is difficult due to a lack of well-defined performance metrics.

This thesis defines and examines the use of two methodical approaches to evaluating Landing Period Indicators (LPIs) and their subject ship-helicopter dynamic interface system. First a methodology utilizing the comparison of a basic transparent algorithm is detailed and a case study employing this methodology is examined. Second, a system dynamics approach is taken to pilot workload analysis, utilizing a dynamic systems model characterizing a subset of the Dynamic Interface. This approach illustrates the realistic gains in understanding and development that can be accomplished by utilizing system dynamics in the analysis of the Dynamic Interface and LPI insertion.

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