Intelligent tracking guidance adapted to the ascent phase of aerospace vehicles

Aiming at the tracking guidance problem in ascent phase of aerospace vehicles, an intelligent guidance method based on adaptive dynamic programming (ADP) is proposed. Firstly, decoupling transformation is carried out for the motion model of aerospace vehicle. Throttle opening and angle of attack are adopted to implement velocity tracking and altitude tracking, respectively. Secondly, multiple constraints under the complex flight environment in ascent phase are established and the observer is designed to deal with nonlinear uncertainties. Then, the cost function of ascent phase tracking guidance problem is constructed, and an ADP method is proposed to achieve the intelligent solution. Finally, it is proved that the tracking error and weight estimation errors of the tracking guidance system are uniformly ultimately bounded. And the proposed intelligent guidance method is verified by simulation.