关键词: 智能桁架结构, 主动振动控制, 自抗扰控制技术

Abstract: Intelligent truss structures, as a new kind of integrated control-structures, have the adaptive geometry and physics characteristics, but these structures also have the complex dynamic characteristics, such as large flexibility, small structure damping, closely low order modes, high degree of mode coupling, uncertainties, and coupling, which brings a great challenge to active vibration control of intelligent truss structures. Therefore, it is studied how to design the model-independent active disturbances rejection vibration controller (ADRVC), based on the extended state observer (ESO) and the nonlinear state error feedback control law (NLSEF). The real-time dynamic linearization of the uncertain nonlinear system is implemented by disturbance estimation via ESO and disturbance compensation via the control law. A NLSEF is designed to control the linear integrator-cascaded type plant. The ADRVC is used for the vibration control of an 83-bar space intelligent truss structure with uncertain-but-bounded parameters. The simulation results demonstrate the ADRVC has good adaptability and robustness to external disturbance and unknown variation in plant parameters.

Key words: Active disturbances rejection control technique, Active vibration control, Intelligent truss structures