Research On Dynamics And Collision Simulation Of Space Belt Net Flight Deployment

Currently,flexible capture of space debris is a popular on-orbit capture technology.It is widely used in the capture of non-cooperative targets such as space debris and abandoned satellites due to its simple structure,high fault tolerance,and low cost.In order to increase the scope of application of flexible capture,it is an effective means to capture high-speed debris by using a stronger belt net instead of a rope net.At the same time,in view of the problem that spacecraft will be damaged by space debris,space belt nets can be used for active protection.Due to the complex nonlinear behavior of the space belt network,dynamic modeling and simulation of the space belt network is of great significance.Therefore,this paper uses highstrength space belt nets instead of rope nets for capturing tasks,proposes the concept of a space belt net capture system,gives its performance evaluation indicators,establishes a space belt net combined spring-particle model,and designs a belt net fracture In addition,the dynamic simulation study of the launch deployment and collision process of the space belt network was carried out,and the influence of different system parameters on the launch deployment and the influence of different target attitudes on the collision process were discussed;the ground test system of belt network was designed and verified The accuracy of the model.Firstly,the concept of the space belt network capture system is proposed,the composition and working principle of the system are introduced,and in order to evaluate the space belt network launch deployment process and collision process,the space belt network deployment and collision performance evaluation indicators are respectively proposed.The deployment performance indicators include the maximum deployment area,Expansion time and conformal time,collision performance indicators include changes in network port area,collision force and target displacement speed.Secondly,a combined spring-mass point model of a space belt network is established.Based on the traditional spring-mass model,in addition to the structural spring describing the tensile strength,bending springs and shear springs describing the bending and shear strength of the mesh are added,and the springs are given different stiffness coefficients under different degrees of deformation.This forms a combined spring-mass point model.In addition,a dynamic model of belt net is established based on the ABAQUS membrane element,and the accuracy of the combined spring-mass point model is preliminarily verified by comparing the two.Then the collision dynamics modeling of the space belt network is carried out,and the collision detection method and the derivation of the collision force are given.Then,the spring parameters were compared and analyzed during the launch deployment process,the fracture criterion was set during the collision,and the high-speed collision comparison simulation of space belt network was carried out.The combined spring-mass method is used to establish the space belt network expansion and collision model based on MATLAB programming.At the same time,the nonlinear finite element method is used to establish the space belt network expansion and collision model based on the ABAQUS/Explicit module.The two models are carried out under the same working conditions.Comparing simulations to verify the accuracy of the combined spring-mass model;A comparative simulation of belt net and rope net was established during deployment and collision.The simulation results showed that the adaptability of belt net to high-speed debris was better than rope net;The launch deployment process of different design parameters and the collision process of different target postures are simulated and analyzed,and the influence of different parameters on the deployment process is obtained.In the actual capture task,the capture strategy can be formulated according to the target posture.Finally,a ground test system of belt net was built.The ground test was carried out on the launch deployment process and collision process of the belt net,and compared with the combined spring-mass point model with the net.The test results show that the test results match the movement posture of the belt net well in the simulation results.It is again verified that the combined spring-mass model can simulate the dynamics of the belt net feature.