Research On Pose Simulation And Compensation Control Of Curve Feeding Platform Of Band Saw

The curve feeding platform is a kind of device for automatic feeding when the woodworking band saw is curved.The accuracy of end pose of the platform directly affects the trajectory's accuracy of the workpiece of sawed and the smooth on surface of workpiece.The band saw blade will be damaged if the end corner of the platform is not tangent to the curve saw path.In serious cases,it will even affect the reliability of the band saw machine and the blade work time.It is necessary to analyze the motion error of each component about the mechanism and study the dynamic compensation control strategy because error compensation is the main method to improve motion accuracy.The artificial feeding action was simulated to develop a feeding platform for the curve band saw,and the inverse solution of the position about the feeding platform was solved based on the method of D-H coordinate transformation and its relative geometric relationship of the mechanism's motion posture.The dynamic transfer function of the mechanism based on the method of virtual work principle is solved to lay a theoretical foundation for the mechanism motion control and compensation control according to the way of described earlier in this paragraph.Analyze the transfer relationship between the mechanism's motion pose and each input function after perform dynamic simulation of the mechanism in the multi-body dynamics software Adams.The influence mechanism of the nut displacement error and the deformation of the connecting rod on the end pose is measured by adding variables,after that the mechanism error model is solved by analyzing the simulation data.An error compensation strategy for the mechanism is proposed,and a single neuron PID compensation control algorithm is designed based on the results of mechanism posture simulation analysis.Simulation analysis on the processing example of the feeding platform combine Matlab and Adams and adjust the key parameters of the single neuron PID algorithm based on the analysis results to obtain the platform compensation control algorithm.The method of experimental is used to verify the curve feeding platform and its error compensation control strategy.The experimental results show that the feeding platform can realize the curve feeding task of the curve band saw machine.The compensation control algorithm can effectively improve the accuracy of the end pose about the feeding platform and the smoothness of the sawing surface.Which indicates that the feeding platform designed in this paper and the control strategy proposed compensation are feasible.