Integration of Active Disturbance Rejection Control (ADRC) in Maritime Technology for Ship's Transverse Sway Trajectory Optimization

Abstract

The maritime industry has long grappled with the challenges of ship stability and maneuverability, particularly when navigating through adverse conditions such as rough seas and unpredictable disturbances. This paper explores a transformative approach to addressing these challenges by integrating Active Disturbance Rejection Control (ADRC) algorithms into maritime technology. ADRC, a sophisticated control methodology, seeks to mitigate disturbances and uncertainties in dynamic systems, making it a promising candidate for optimizing a ship's transverse sway trajectory. Results: From the preliminary analyses, it was determined that the effects of ADRC on transverse sway trajectory are significantly different between the ship and mode C environment. The ship generated its own modes C (sway 7.4 m/s) and B (sway 2.6 m/s) which also created disturbance to ADRC. In the mode C case, the disturbance from these modes affected transverse sway trajectory by 18%. These results demonstrate that it is possible to establish an anti-disturbance control algorithm using sensors subject to these disturbances in order to make the best decision regarding anti-disturbance measures and predict changes in ADRC effectiveness due to environmental conditions on a ship. “Recent increases in marine accidents and incidents have highlighted the need for improving the safety of vessels. Research has shown that the probability of accident reduction can be increased by implementing Active Disturbance Rejection Control (ADRC) systems which are effective methods of controlling anti-disturbance. This paper will describe a study that evaluates control methods under various cases. It is important to evaluate the impact of ADRC on ship transverse sway trajectory due to disturbances from various factors such as cargo, piping, etc. Factors that may affect both ship transverse sway and its subsequent regulation after implementing ADRC include vessel geometry, wave characteristics, speed, acceleration profile and its relationship with sea state."- Takeuchi et al.

Results:

From the preliminary analyses, it was determined that the effects of ADRC on transverse sway trajectory are significantly different between the ship and mode C environment. The ship generated its own modes C (sway 7.4 m/s) and B (sway 2.6 m/s) which also created disturbance to ADRC. In the mode C case, the disturbance from these modes affected transverse sway trajectory by 18%. These results demonstrate that it is possible to establish an anti-disturbance control algorithm using sensors subject to these disturbances in order to make the best decision regarding anti-disturbance measures and predict changes in ADRC effectiveness due to environmental conditions on a ship.

"Recent increases in marine accidents and incidents have highlighted the need for improving the safety of vessels. Research has shown that the probability of accident reduction can be increased by implementing Active Disturbance Rejection Control (ADRC) systems which are effective methods of controlling anti-disturbance. This paper will describe a study that evaluates control methods under various cases. It is important to evaluate the impact of ADRC on ship transverse sway trajectory due to disturbances from various factors such as cargo, piping, etc. Factors that may affect both ship transverse sway and its subsequent regulation after implementing ADRC include vessel geometry, wave characteristics, speed, acceleration profile and its relationship with sea state."- Takeuchi et al