Simulation And Experimental Study On The Dynamic Balancing Of Elastic Planar Five-bar Linkages

The inertia force of elastic linkages causes shaking force and shaking moment,which in return cause the vibration and deformation of elastic links.Deformation is bound to change the inertia force,thus increasing the shaking force and shaking moment.Therefore,when study the balancing of linkage mechanisms,it is necessary to concern the two dynamic indexes,namely shaking of the mechanism and vibration of the link simultaneously.The paper has done the simulation and experimental study on the dynamic balancing of elastic planar five-bar linkage by using the Partial Redundant Servo Motor(PRSM)approach.In the first half part,firstly,a finite element model of five-bar linkage is established and the dynamic simulation analysis is done.The simulation results show that the shaking of the whole mechanism and the vibration of the elastic links are continually aggrandized along with the increasing of the cranks speed.Then,taking the shaking of the mechanism,the vibration of two connecting rods,the integrated function of both of them as the optimization goal respectively,optimize the dynamic property of the elastic five-bar linkages based on PRSM approach,and analyze the optimization results.In the second half part,a simple and novel method for measuring the shaking moment is proposed based on the principle of conservation of moment,and a test bed is built.The shaking moment of five-bar mechanism operating under given two different initial configurations are measured.By comparing the experimental results and the simulation results,the feasibility and validity of the novel method is verified.At last,experimental study to verify the dynamic balancing effect of PRSM approach is done on the test bed.