The optimization of the hinge point position with a 2-DOF planar parallel heavy-duty hoisting mechanism

Abstract By analyzing the mechanic’s characteristics of the hydraulic cylinder of the moving arm of the lifting mechanism under several extreme working conditions, the mathematical model of optimizing the hinged position of the lifting mechanism is established with the minimum and maximum load of the hydraulic cylinder of the moving arm as the optimization objective. The problem of multi-objective optimization is dealt with by the method of extremely large and extremely small and solved by the optimization algorithm. Through optimization, the maximum force of the hydraulic cylinders can be markedly reduced, the force characteristics of the lifting mechanism can be improved, and the ultimate load at the hinge point of each hydraulic cylinder can be reduced. The optimization method provides an important basis for the parameter design and improvement of the lifting mechanism and similar products.