一种在线再入侧向制导方法

侧向制导是飞行器再入制导的重要组成部分,由于传统侧向制导方法不能对倾侧角反转次数进行在线优化,往往会给再入飞行器姿态控制系统的设计带来沉重负担.为此,利用伪谱法可在线快速求解优化问题的特点,提出了一种基于伪谱法的在线再入侧向制导方法,并结合纵向预测校正制导法进行再入制导解算以缩减优化规模.仿真结果表明,在保证制导精度的前提下,所提方法有效地减少了倾侧角反转次数.

An on-line method of lateral reentry guidance

Lateral guidance is an important part of reentry guidance of flight vehicles.However,the traditional lateral guidance method lacks the ability of on-line optimization,which leave attitude control system the burden of a great deal of bank angle-reversals.So in this paper,an optimized designing method working in real-time was proposed based on the high precision and convergence speed of pseudo-spectral method,and combined the longitudinal predictor-corrector method to reduce the size of optimal design.Simulation results show the effectiveness of the proposed method in reducing the number of bank-angle reversals.