Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Adaptive Sliding Mode Control Synthesis of Maritime Autonomous Surface Ship

  • Lee, Sang-Do (Korea e-Navi Information Technology Co. LTD.) ;
  • Xu, Xiao (Department of Logistics Engineering, Korea Maritime and Ocean University) ;
  • Kim, Hwan-Seong (Department of Logistics Engineering, Korea Maritime and Ocean University) ;
  • You, Sam-Sang (Division of Mechanical Engineering, Korea Maritime and Ocean University)
  • Received : 2019.05.10
  • Accepted : 2019.05.28
  • Published : 2019.05.31
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Abstract

This paper investigates to design a controller for maritime autonomous surface ship (MASS) by means of adaptive super-twisting algorithm (ASTA). A input-out feedback linearization method is considered for multi-input multi-output (MIMO) system. Sliding Mode Controller (SMC) is suitable for MASS subject to ocean environments due to its robustness against parameter uncertainties and disturbances. However, conventional SMC has inherent disadvantages so-called, chattering phenomenon, which resulted from the high frequency of switching terms. Chattering may cause harmful failure of actuators such as propeller and rudder of ships. The main contribution of this work is to address an appropriate controller for MASS, simultaneously controls surge and yaw motion in severe step inputs. Proposed control mechanism well provides convergence bewildered by external disturbances in the middle of steady-state responses as well as chattering attenuation. Also, the adaptive algorithm is contributed to reducing non-overestimated value of control gains. Control inputs of surge and yaw motion are displayed by smoother curves without excessive control activities of actuators. Finally, no overshoot can be seen in transient responses.

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References

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