Operability Evaluation of Pleasure Boats Based on Usability as Addressed by ISO 9241-11

  • IIHAMA Kohei
    Nagaoka National College of Technology, Advanced Course in Electrical and Mechanical Engineering
  • TOYAMA Shigehiro
    長岡工業高等専門学校 電子制御工学科
  • IKEDA Fujio
    長岡工業高等専門学校 機械工学科
  • SETA Hiroaki
    鳥羽商船高等専門学校 商船学科
  • EZAKI Nobuo
    鳥羽商船高等専門学校 制御情報工学科

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Other Title
  • ユーザビリティに基づく小型船舶の操作性評価

Abstract

This paper proposes an evaluation method for operability of pleasure boats in order to develop an electronic control steering system of those boats. Based on usability as addressed by ISO 9241-11, some evaluation criteria such as effectiveness and efficiency are defined for a task of collision avoidance and course resuming. For safety and repeatability, the simulation with a simplified ship simulator, which is composed a manual hydraulic steering system as hardware in HILS, is performed instead of experiments. As a result of the simulation, it is found that the operability of the manual hydraulic steering system deteriorates in the case of emergency collision avoidance. In particular, the wakes of the course resuming after the emergency collision avoidance are caused to be periodic by wrong estimate of the normal pressure and by time delay in the dynamics of the pleasure boat. Therefore, it is found that the electronic control steering system of pleasure boats should have the functions to support estimation of the normal pressure and to compensate the time delay.

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