Trajectory Tracking Control Method Based on Adaptive Higher Order Sliding Mode

To resolve the problem of high-precision trajectory tracking control under interference conditions in a missile's mid-guidance phase, according to the constructed nominal trajectory, an improved adaptive high-order sliding mode trajectory tracking controller (AHSTC) is proposed. In this method, the open-loop nominal trajectories are established according to the nonlinear programming and Gaussian pseudospectra method. A high-precision trajectory tracking controller is developed by designing a nonlinear sliding mode surface and an adaptive high-order sliding mode approaching law combined with the trajectory tracking nonlinear error model. To verify the effectiveness and superiority of the proposed method, analysis and simulation are carried out through the example of a missile mid-guidance phase tracking control. Compared to the linear quadratic regulator (LQR) and active disturbance rejection controller (ADRC) method, the simulation results show that the proposed AHSTC method shows faster convergence and improved tracking effect. Therefore, the proposed AHSTC method has a good results and engineering application value.

Automated summary

An improved adaptive high-order sliding mode trajectory tracking controller is proposed in this paper to resolve the problem of high-precision trajectory tracking control in a missile's mid-guidance phase under interference conditions. By constructing open-loop nominal trajectories and designing a nonlinear sliding mode surface and an adaptive high-order sliding mode approaching law, a high-precision trajectory tracking controller is developed. Simulation results show that the proposed method achieves faster convergence and improved tracking effect compared to other methods.