基于偏置比例导引的落角约束滑模制导律

In order to make the missile attack ground moving targets such as armored vehicles at a certain impact angle, the variable structure control theory is applied to derive the sliding mode guidance law with impact angle constraint based on the bias proportional guidance, and parameter adaptive power reaching law is designed based on the Lyapunov stability theory. Considering the difficulty of measuring for target speed, the extended states observer (ESO) is introduced to estimate the target speed. Simulation results show that the designed guidance law can accurately hit stationary targets and maneuvering targets with required impact angle, and need less maximum required normal overload and less normal overload near the hit point, and the rear part of trajectory is relatively straight.