The Heila first class marine crane is being installed at the ASL Shipyard in Sigapore. The crane has been designed to obtain the highest class according to the US classification society ABS (American Bureau of Shipping) regulations.
Active Heave Compensation (AHC)
The active heave compensation is for keeping the load at a fixed position relative to the seabed, and to avoid that the vessel motion is being transfered to the load. The AHC control is connected to a motion reference unit (MRU) that feeds the system with accurate real-time information of the crane tip motion. The iSYM Crane Computer will pay in and pay out on the winch to compensate for the heave motion.
Benefits of using the AHC Function:
· Enhanced capabilities to work at harsh sea conditions
· Increased operational time, less time waiting for good weather
· Accurate control of load position
100Ton Heila crane installation at ASL shipyard Singapore
Screenshot of pay out operation with AHC function. The wirelength trend line is showing that the winch is compensating for heave motion at the crane tip. |
