Active Control Of Millingvibration Based On Active Damping Device And Experimental Research On Gear Vibration Reduction

According to problems such as the deformation of the workpiece caused by flutter during the processing of thin-walled rocket shell skin workpiece,and the gear shaft system failure caused by the vibration generated in the gear transmission process,this paper studied a system that can actively dampen the controlled system.Active Damper Device(ADD)was applied to the flutter control during thin-wall milling and the vibration control of the gear transmission system to explored the vibration control effect of each system under different working conditions.At the same time,in the process of the petrochemical enterprise engineering project,through the damping vibration reduction technology,the vibration of the petrochemical equipment pipeline in a refinery was effectively controlled.The main research contents were summarized as follows:(1)The performance of the ADD and the control principle of direct speed feedback were studied.According to the principle of electromagnetic inertial actuator,the amplitude-frequency response characteristics are explored through experiments and simulations,and the linear frequency range of the actuator was obtained,and the principle of vibration suppression was explained and the ADD was used through the NI Lab VIEW program environment visualize the change of feedback gain coefficient during the process.(2)An active control method for milling vibration of thin-walled workpieces was studied.According to the vibration problem in the milling process of thin-walled workpiece,the modal analysis and harmonic response analysis of the workpiece were carried out,and the vibration control test bench for the weight-reduction grid milling of thin-walled workpiece was built.Changed the milling position and milling parameters of the milling cutter,compared the vibration data of the workpiece before and after applying ADD under different working conditions,analyzed the control law of ADD on the milling vibration of the thin-walled workpiece,and analyzed the roughness of the workpiece surface with and without the vibration control.The improvement of milling accuracy of thin-walled workpieces.It provided a theoretical basis for the active control method of milling vibration of the thin-walled cylinder of the rocket shell in practical engineering.(3)An ADD arrangement scheme for controlling the vibration of the gear shaft system was determined.According to the vibration problem generated during the high-speed operation of gears,a first-level gear test bench was designed and built,and ADD was installed on the bearing seats of the main and driven shafts of the gear respectively.By comparing the main and driven shafts of the gear,the front and rear shafts of the ADD were applied.Amplitude,explore its damping effect on gear transmission.By changing the number and arrangement of ADD,analyzed the best damping plan of ADD for gear shaft system.(4)The vibration problem of equipment pipelines in petrochemical enterprises were solved by the application of damping vibration reduction technology.Through ANSYS analysis of the pipeline modal and vibration reasoned and designed the construction plan,the viscous damping vibration reduction technology was applied to the pipeline vibration reduction transformation under the condition that the equipment was not shut down,which solved the problem of the heavy delivery of asphalt equipment in a refinery in Hebei.Excessive vibration of the pipeline and the secondary inlet pipeline of the raw gas compressor.