In order to improve the position control accuracy of rodless cylinder,the valve control cylinder system based on pneumatic proportional servo is studied deeply.According to the working principle of the mechanical rodl...In order to improve the position control accuracy of rodless cylinder,the valve control cylinder system based on pneumatic proportional servo is studied deeply.According to the working principle of the mechanical rodless cylinder control system,under the condition of uniform speed,the driving voltage of the proportional valve is changed to measure multiple sets of friction force and corresponding velocity data.Analyzed the physical structure of each component in pneumatic system,established the mathematical model of pneumatic system,and introduced MATLAB system identification toolbox to identify the parameters of the transfer function.and the experiment verifies its correctness.展开更多
In order to prolong the service life of piston rings of heavy vehicle engine and decrease the friction and wear of piston rings and cylinder liner,CrMoN/MoS_2 multilayer films were deposited on the surface of rings by...In order to prolong the service life of piston rings of heavy vehicle engine and decrease the friction and wear of piston rings and cylinder liner,CrMoN/MoS_2 multilayer films were deposited on the surface of rings by magnetron sputtering and low temperature ion sulfuration.FESEM equipped with EDX was adopted to analyze the compositions and morphologies of surface,cross-section,and wear scars of the multilayer films.The nano-hardness and Young＇s modulus of the films were measured by a nano tester.Tribologicalproperties of the films were tested by an SRV~174;4 wear tester.The experimentalresults indicate that the structures of the multilayer films are dense and compact.The films possess nano hardness value of approximately 26.7 GPa and superior ability of plastic deformation resistance.The multilayer films can activate solid lubricating,and possess an excellent antifriction and wear resistance under the conditions of heavy load,high frequency,high temperature,and dynamic load.展开更多
基金The paper is Supported by Henan Province Science and Technology Key Project(Grant No.202102210081)the Fundamental Research Funds for Henan Province Colleges and Universities(Grant No.NSFRF140120)Doctor Foundation of Henan Polytechnic University(Grant No.B2012-101).
文摘In order to improve the position control accuracy of rodless cylinder,the valve control cylinder system based on pneumatic proportional servo is studied deeply.According to the working principle of the mechanical rodless cylinder control system,under the condition of uniform speed,the driving voltage of the proportional valve is changed to measure multiple sets of friction force and corresponding velocity data.Analyzed the physical structure of each component in pneumatic system,established the mathematical model of pneumatic system,and introduced MATLAB system identification toolbox to identify the parameters of the transfer function.and the experiment verifies its correctness.
基金Funded by the National Natural Science Foundation of China(No.50901089)the Project supported by Army Important Researches(No.2012ZB02)
文摘In order to prolong the service life of piston rings of heavy vehicle engine and decrease the friction and wear of piston rings and cylinder liner,CrMoN/MoS_2 multilayer films were deposited on the surface of rings by magnetron sputtering and low temperature ion sulfuration.FESEM equipped with EDX was adopted to analyze the compositions and morphologies of surface,cross-section,and wear scars of the multilayer films.The nano-hardness and Young＇s modulus of the films were measured by a nano tester.Tribologicalproperties of the films were tested by an SRV~174;4 wear tester.The experimentalresults indicate that the structures of the multilayer films are dense and compact.The films possess nano hardness value of approximately 26.7 GPa and superior ability of plastic deformation resistance.The multilayer films can activate solid lubricating,and possess an excellent antifriction and wear resistance under the conditions of heavy load,high frequency,high temperature,and dynamic load.
