关键词: 智能桁架结构, 自抗扰振动控制, 自适应遗传算法

Abstract: The intelligent truss structure, as a new type of space structure with integrated control structure, has the adaptive geometry and physics characteristics, but this type of structure also has the complex dynamic characteristics, such as large flexibility, small damping, intensive low-frequency modes, high degree of mode coupling, multiple uncertainties and couplings, which bring a great challenge to active vibration control of intelligent truss structures. Therefore, the application of the model-independent active disturbances rejection control (ADRC) technique in the active vibration control of intelligent truss structures is studied and the framework of the active disturbances rejection vibration controller (ADRVC) is proposed. Aiming at the parameter adjustment problem of the ADRVC, the stepwise optimal design idea based on the adaptive genetic algorithm is proposed. Finally, the ADRVC is used for the active vibration control of a 102-bar triangular prism intelligent truss structure with interval parameters. The simulation results demonstrate that the stepwise optimal design idea for ADRVC firstly ensures the extended state observer (ESO) to have good observation performance, consequently it ensures the optimal ADRVC to have excellent “active disturbances rejection” capability; the optimal ADRVC has good robustness to the uncertainty of structural parameters and uncertain external disturbance, which can be effectively used for the active vibration control of space intelligent truss structures.

Key words: Active disturbances rejection vibration control, Adaptive genetic algorithm, Intelligent truss structures