Research On Hypersonic Separation Dynamics Model Technology

The paper provides an description of stage separaton of hypersonic vechicle. In the condition of non-axisymmetrical stage separation in hypersonic flight,the problems of dynamics and kinematics of the validating vechicle and the launch vechicle are primarily analysised.It includes the movement of the center of mass and the rigid body of the vechicles,the relative movement of the different vechicles,the relative movement of the special parts of the different vechicles, the load analysis and the probable collision in the process of stage separation.The paper firstly introduces the background and meaning of the issue,then provides some predigested assumption in the process of the hypersonic stage separation,it includes the basal information of the separation and the summarization of the separation process.The analysis of kinematics of the stage separation process is followed.It primarily discusses the movement law of the bodies in the process of separation.It includes the definition and the relative relation of the correlative reference frame.The absolute movement and relative movement of two bodies and the relative movement of the special parts are analyzed in term of the movement law.The next is the anlysis of of the dynamics.The basal dynamics equations in the separation process are constructed in the light of the basal dynamics theories.The load analysis and the differential equations of two bodies in the separation process are included,then the collision model is constructed,it primarily talkes about the likehood of the collision of two bodies in the process of stage separation.The separation is at the last.It provides the fourteen-degrees-of-freedom theory model and the six-degrees-of-freedom simulink simulation model of the vechicles,and an example of the longitudinal separation dynamics three-degrees-of-freedom theory model and simulink model.