Active disturbance rejection based trajectory linearization control for hypersonic reentry vehicle with bounded...

Area of Science:

• Aerospace Engineering
• Control Systems Theory
• Nonlinear Dynamics

Background:

• Hypersonic reentry vehicles (HRVs) face complex attitude control challenges due to bounded uncertainties and actuator saturation.
• Existing control strategies often struggle to balance performance with robustness in such demanding environments.

Purpose of the Study:

• To develop a novel compound control scheme for HRV attitude tracking systems.
• To address actuator saturation and bounded uncertainties using advanced control techniques.

Main Methods:

• Integration of trajectory linearization control (TLC) and active disturbance rejection control (ADRC).
• Application of nonlinear tracking differentiator (TD) to mitigate actuator saturation.
• Design of linear extended state observers (LESO) for uncertainty estimation.
• Development of feedback linearization (FL) controllers based on LESO estimates.

Main Results:

• The proposed compound controller effectively estimates and compensates for system uncertainties.
• The tracking error converges asymptotically to a residual set, demonstrating robust performance.
• Simulation results validate the control strategy's effectiveness in complex HRV attitude tracking scenarios.

Conclusions:

• The novel compound control scheme offers a promising solution for HRV attitude control under uncertainties.
• The combination of TLC, ADRC, TD, LESO, and FL provides enhanced stability and performance.