Biomimetic Linkage Mechanism Robust Control for Variable Stator Vanes in Aero-Engine

Area of Science:

• Control Engineering
• Aerodynamics
• Robotics

Background:

• Stator vane positioning systems face challenges due to uncertain aerodynamic disturbances.
• Electro-hydrostatic actuators are crucial for precise control in these systems.
• Enhancing control precision in uncertain environments is a significant engineering problem.

Purpose of the Study:

• To design a robust position tracking control for stator vanes driven by electro-hydrostatic actuators.
• To address challenges posed by uncertain aerodynamic disturbances and complex environments.
• To develop a novel control strategy inspired by biological systems.

Main Methods:

• A novel robust control strategy based on the backstepping method was developed.
• Virtual rotational speed and virtual pressure difference force were designed to simplify control.
• The control strategy was validated through numerical hydraulic simulations.

Main Results:

• The proposed backstepping-based control significantly improves tracking accuracy.
• The control strategy demonstrates enhanced robustness against aerodynamic disturbances.
• Performance analysis confirmed the stability and effectiveness of the designed controllers.

Conclusions:

• The developed robust control strategy offers a promising solution for stator vane positioning.
• This approach has the potential to be a next-generation solution for similar control problems.
• The method effectively enhances control precision and robustness in uncertain environments.