Dynamic optimization of a crane load curve

A tower crane including a mast supporting a boom on which is mounted a carriage intended to carry a suspended load, the tower crane further comprising a system for controlling the command of the lifting of the suspended load, the system configured to:

• determine, depending on the mass (M) of the suspended load, a specified load factor (ψ0*) quantifying an acceptable exceedance with respect to a predetermined maximum allowable load for said crane;
• determine a maximum permitted lifting acceleration (L″MAX), depending on the mass (M) of the suspended load, on the specified load factor (ψ0*) and on the distribution position (Xc) of the load suspended on the boom with respect to the mast;
• determine, from lifting speed setpoints (CMD), optimized lifting speed setpoints (CMD′) intended to be executed by a motor device (41) for displacing the suspended load according to a lifting movement so that the acceleration related to the lifting movement remains, in absolute value, less than or equal to the maximum permitted acceleration (L″MAX).