Motion Control Strategies for Smart Floating Cranes

Wouter Bentvelsen, Guus Jonathan Gorsse, Niels Bouman, Vincent Bashandy, Vittorio Garofano and Jovana Jovanova

Floating structures have raised interest in the recent years for different applications, from living and farming at sea to renewable energy production. To support the logistics on the floating structures, floating cranes are necessary and their designs are constantly improved. Increasing developments in the automation industry paved the way for automated crane operations. In this work, motion control of a smart crane is presented with particular attention to the performance under wave motion. In this research, a scaled down, two-dimensional mathematical model of a gantry crane is derived using Lagrangian mechanics and DC motors dynamics. This results in a nonlinear system that is capable of simultaneous traversing and hoisting a container. The system is simulated in MATLAB Simulink environment and a proportional-derivative control and a state feedback control are designed and implemented. Their robustness is explored by modelling sensor behavior, external disturbances and floating platform dynamics. Both control strategies were able to keep stability in a disturbed system. During simulation, the sway angles never exceed 10 degrees. Smaller oscillations occurred using the state feedback control. Therefore, it creates a smoother response compared to the proportional derivative control, which ultimately translates to increased safety, turnover rate and durability of the crane.

KEYWORDS: Motion control, Smart cranes, Floating platform, State feedback control, PD control

Guus Jonathan Gorsse is a bachelor student mechanical engineering at the TU Delft. He is an active and motivated student which has interests surpassing his study program. He went on exchange to the Tokyo Institute of Technology in 2019, follows multiple side courses due to his desire to make the most out of his study and he ran a campaign for the central student council of the TU Delft where he won a seat for 2020-2021 under the party ORAS. He will put effort in creating a better environment for international students and revising the financial aiding program of the TU Delft for students wanting to get more out of their student time just like him.

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