Abstract: Abstract:In order to ensure the stability and safety of the ship lifter operation and to improve the operation efficiency and the service life of the ship lifter, a synchronous control system of the ship lifter main lift cylinder based on electrohydraulic proportional technology was proposed. The principle, the composition and the application of the system were introduced. The system ensures the main lift cylinder of the hydraulic lifting type ship lifter to operate synchronously, and the stability of the system operation was improved.

Key words: Keywords:ship lifter, electrohydraulic proportional technology, main lift cylinder, synchronous control