高超声速滑翔再入定向定速打击末制导算法

A short-range low-lift-to-drag ratio hypersonic glide-reentry vehicle with impact angle constraint and deceleration control is selected as the object of study. By introducing a trajectory adjustment phase to make the vehicle satisfy the capturability condition of the terminal guidance phase, the problem of the hypersonic glide-reentry vehicle which is difficult to attack the target directly with impact angle constraint and deceleration control is solved. In order to push down the trajectory and maintain the field of view, a biased proportional guidance law is proposed by adjusting the coefficient of the error feedback. On this foundation, a velocity control order generation method is established based on the estimation of the angle of attack and flight-path angle, to solve the problem of the ideal velocity control order generation method which has a low accuracy. Extensive simulations are conducted to verify the design features of the algorithm.