A traditional dredging systems on grab dredgers are typically controlled manually,which leads to low control precision and poor dredging flatness.Relying on a control modification project for a specific grab dredger,the operational characteristics of the grab dredger and the driving characteristics of the hydraulic system were analyzed.A depth-keeping algorithm based on model predictive control and a fine dredging control algorithm based on fuzzy control were proposed.A depth-keeping and fine dredging control system based on Siemens PLC was designed,ultimately achieving fully automatic"one-touch fine dredging".Practical application on the dredger demonstrates that the fully automatic operation process of depth-keeping and fine dredging control system is stable and reliable,with high control accuracy and flat excavation surfaces,which meets the construction operational requirements and enhances the construction efficiency of grab dredger operations.
gab dredgerfuzzy controldepth-keeping and fine dredgingfully automatic operation
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