一种改进的最优制导律及其仿真研究

高速再入飞行器通常具有末制导系统，为保证末制导系统的正常工作，制导律的设计不但要保证末端制导精度，还要使飞行器以一定的速度到目标，提出了一种改进的最优制导律设计方法，得到了可以保证末端速度方向的制导律，速度大小控制通常靠理想速度曲线来保证，按一定的规则将最优制导律与理想速度曲线结合起来就得到了满足全部要求的制导律。仿真结果表明：所提出的改进的最优制导律是合理、有效的。

An improved optimal guidance law and its simulation study

High-speed reentry aerocraft is usually with terminal guidance system.For the normal work of the terminal guidance system,the design of guidance law must not only guarantee the terminal guidance accuracy,but also guarantee the terminal amplitude and direction of velocity.In this paper,an improved optimal guidance law design method was proposed.The obtained guidance law can guarantee the terminal direction of velocity.The control of amplitude of velocity depends on the ideal velocity curve.As long as combine of the obtained optimal guidance law with ideal velocity curve according to some certain rule, the final guidance law that satisfy all of guidance object will be obtained.The simulation results show that the proposed guidance law is rational and efficient.