Optimization And Test On Performance Of Anti-Vibration Platform Damping System

Anti-Vibration Platform(AVP)is mainly used to carry high-precision instruments and equipment applications to provide a stable working environment.In the fields of geological exploration,aerospace study,medical equipment and optical equipment applications,strict vibration isolation environment is needed to improve the measurement accuracy.Therefore,it is of great significance to study the vibration isolation platform.In this paper,the 6-DOF series AVP(founded by MST of China: the study of vehiclemounted mobile AVP)is taken as the research object,and the parameter optimization design is carried out,aiming at reducing the vertical acceleration and displacement of the up-platform on the vibration isolation platform.Firstly,based on the original mechanical model of AVP,the design is improved.The damper and air spring are used in series to improve the low-frequency vibration isolation ability of the platform.The multi-body dynamics modeling software ADAMS/View and MATLAB were used to establish the AVP system model.The accuracy of the virtual prototype model was verified by the AVP mathematical model,and the dynamic simulation analysis of the virtual prototype model was carried out under three kinds of simulated road excitation.The AVP structure parameters,the stiffness and damping parameters are parameterized,vertical acceleration and the vertical displacement are optimization goals,through the multidisciplinary optimization design software of ISIGHT integrated ADAMS/View to carry out simulation calculation of multi-objective parameter optimization using the fast elitist multiobjective genetic algorithm(NSGA_II)and multi-objective particle swarm optimization algorithm(MOPSO),the simulation results show that the isolation rate of optimized AVP increased significantly,which under the sine excitation NSGA_II algorithm optimization effect is better than that of MOPSO algorithm,under the pulse and step incentives,MOPSO algorithm has better optimization effect than NSGA_II algorithm.Finally,on the 6-DOF simulation experiment platform,under sine road excitation,the optimized stiffness and damping parameters of the AVP were validated,the simulation results of test data are corresponding to the simulation trend,the range of allowable error is accepted,thus the reliability of the simulation results of damping system parameter optimization is verified,the rate of vibration isolation of AVP can be effectively improved using the optimized parameters.