升力式飞行器助推段多约束弹道优化设计

升力式飞行器助推段弹道设计面临着复杂大气飞行环境下多约束耦合条件下的运载能力优化难题,需要在满足分离高度、攻角量值与变化率限幅、入轨点高度与倾角等约束下,通过设计助推段程序角,使得入轨点速度最大.为了寻求一种快速解决这一问题的工程设计方法,以三级固体运载器为研究对象,提出了升力式飞行器助推段多约束弹道设计方法,通过设计...

Optimization Design of Trajectory in Boost Phase of Lift Vehicle With Multi-constraints

The design of trajectory in boost phase of the lift vehicle is facing the difficult problem of carrying capacity optimization under the coupling condition of multiple constraints in the complex atmospheric flight environment. It is necessary to design the program angle of the boost phase to maximize speed of entering orbit under the constraints of stages separation height,angle of attack limit,height of the orbit entry point,etc. In order to find an engineering design method to quickly solve this problem,taking the three-stage solid launch vehicle as the research object,the multi-constraint trajectory design method in boost phase of the lift vehicle was put forward. The design variables were formulated by designing the flight trajectory mode of the boost phase,and the constraint conditions of the boost phase were determined. The optimization model aiming at the maximum orbital speed under multi constraints was built. By analyzing the coupling relationship between design variables and constraints,an efficient optimization process was formulated. The optimization initial value was determined by Newton iterative method,and the optimization simulation was carried out by sequential quadratic programming method. The optimal solution satisfies the multi-constraint conditions,and the orbit entry speed increases by 3.1%,which verifies the correctness of the trajectory design method and the effectiveness of the optimization process. The multi-constraint trajectory optimization design method in boost phase of lift vehicle has strong engineering practicability. The modeling method and optimization process can offer reference for other optimization problems.