High-precision overload control technology of sub-orbital launch vehicle

Aiming at the requirement of the reusable suborbital launch vehicle back into the earth with high precision, the article puts forward a high-precision multi-loop overload control scheme. By using the feedbacks of angular velocity and its integral, the damping characteristic of the whole system is improved, and the control augmentation of the inner loop is formed. Through the proportional-integral control of the overload deviation in the outer loop, the stabilization of the whole control loop and the effective tracking for the guidance command are both achieved. Compared with the simulation of the attack angle control scheme, the proposed control scheme based on overload feedback can better track the standard trajectory guidance, which reflects the better wind resistance and the stronger robustness.