滑翔式飞行器高空自适应跟踪制导控制方法

For the reentry of glide hypersonic vehicles with large maneuverability flying in complex high altitude environment, a multi-state adaptive guidance method was proposed based on linear quadratic regulator (LQR). On the basis of the dimensionless reentry movement model of the vehicle, taking the flight dynamic characteristics, path constraints and terminate constraints into account, a safe flight corridor was designed, and polynomial fitting method was used to convert the standard trajectory into a function with range, altitude, velocity and flight-path angle. Then, a multi-state adaptive guidance law was designed based on the LQR and polynomial fitting method was used to implement a gain scheduling function for trajectory guidance law. A complete guidance method design process for the reentry of the glide vehicle based on reference trajectory and multi-state LQR was formed. A simulation verified the guidance method and indicated that it is an effective and high-accuracy adaptive guidance method.