Co-simulation And Optimization Of Rigid-flexible Coupling Structure Based On Virtual Prototype

With the development of aerospace technology,large space rigid-flexible coupling structures,which are typically represented by space flexible manipulators and large antenna deployment mechanisms,have become more and more widely used.Due to the large size,light weight and low rigidity of this type of structure,it is easy to generate vibration when working in a complex space environment.In this paper,a large-scale antenna of a certain type of satellite is taken as the research object.It is difficult to model the large rigid-flexible coupling structure and the cumbersome simulation analysis.It is hoped that a simple and universal method can be explored to realize the rigid-flexible coupling structure dynamic modeling simulation and vibration control optimization.In order to improve the efficiency of joint modeling and simulation of rigid-flexible coupling structures,this paper firstly creates a flexible body model based on modal neutral files in ADAMS,and establishes a rigid-flexible coupling structure by creating rigid bodies,adding constraints and driving.The simulation results show that the simulation accuracy of the method meets the requirements,and the modeling simulation efficiency is greatly improved because it does not need to call the finite element model of the flexible body.In order to realize the vibration control of rigid-flexible coupling structure,a simplified model of semi-active control system is built in Simulink according to the principle of semi-active control technology.Through the data exchange interface between ADAMS and Simulink,the ADAMSSimulink co-simulation platform is established,and the joint simulation of rigid-flexible coupling structure vibration control is realized.The simulation results show that the control system in Simulink can suppress the vibration of the rigid-flexible coupling structure in ADAMS,which proves the correctness of the co-simulation platform and the effectiveness of the control system.In order to optimize the vibration control of the rigid-flexible coupling structure,it is necessary to find the value range of the vibration control parameters.Based on the multi-disciplinary optimization software Isight,the parameters of the vibration control system are optimized.By comparing and analyzing the optimized results,Through optimization,the parameter value range that satisfies the vibration control effect can be determined,which provides a reference for the design of the control system.