A unified mathematical model of functional efficiency of a hoisting crane

There was suggested and validated the criterion of functional efficiency of a hoisting crane in the form of a unified mathematical model. This model includes the model of structural interrelationships of large assembly units which is general for the known hoisting crane constructions; the model of the mathematical formulation of functional interrela-tionships of hoisting crane large assembly units; the design procedure of values of functional efficiency criterion. The concept of functional efficiency is formulated. Based on the examples of cranes of different types, there were shown the formation features of structural interrelationships of large assembly units of crane constructions; the example of synthe-sis of the corresponding structural formulas is provided; the building of the mathematical model of functional interac-tion of large assembly units inside the crane is shown; the matrix of interaction is semantically decoded.