论文部分内容阅读
以往对某型末制导炮弹弹道特性的研究多基于单刚体弹道模型,弹体在飞行过程中所进行的力学分析仅考虑空气动力的作用,未考虑其结构内部具有独立运动部件的动力学特性的影响,这与实际弹体的力学环境有较大的差别。末制导炮弹弹体内惯导陀螺转子动力学特性会对其弹道特性产生的重要影响。为了建立更加精确的弹道模型,引入多刚体系统动力学理论建立末制导炮弹二体系统运动模型,全面分析了惯导陀螺与末制导炮弹弹体之间的力学关系,考虑二者的连接方式与约束关系,计算了二体之间的约束力与约束力矩,给出了弹体与陀螺二体联系方程。编制了末制导炮弹弹道仿真软件,对末制导炮弹惯导飞行增程弹道进行仿真,分析得到陀螺运动状态对弹道特性产生重要影响的结论,该结论为研究弹体结构优化设计奠定基础。
In the past, the research on the ballistic characteristics of a terminal-guided projectile was based on a single rigid body ballistic model. The mechanical analysis of the projectile during the flight only considered the aerodynamic effects and did not consider the dynamic characteristics of the independent moving parts Impact, which is the physical environment of the physical body there is a big difference. The dynamic characteristics of the gyro-gyroscopic rotor in the terminal guided projectile body will have an important impact on its ballistic characteristics. In order to establish a more precise trajectory model, the kinematic theory of multi-rigid body system is introduced to establish the two-body system kinematic model of the terminal guidance projectile. The mechanical relationship between the inertial gyro and the terminal guided projectile body is comprehensively analyzed. Considering the connection between the two, Constraint relationship between the two bodies calculated binding and binding moment, gives the body and gyroscope two body contact equations. The ballistic simulation software of the terminal guidance projectile was developed to simulate the range - guided ballistic range - extended trajectory of the final guided missile. The conclusion was obtained that the gyroscopic motion has an important influence on the trajectory characteristics. This conclusion lays the foundation for the study of the optimization design of the projectile structure.