Piezoelectric active disturbance rejection control for flow-induced vibration of the wind tunnel test models

Background: This study aims to develop an efficient vibration control system to suppress the low-frequency and large-amplitude resonance of the slender cantilever model support system due to flow separation and turbulence in wind tunnel tests. Methods: A multi-dimensional vibration piezoelectric active damping (PAD) system based on the multi-input multi-output modified active disturbance rejection control (MIMO-MADRC) is proposed to realize the active control for flow-induced vibration of the wind tunnel test models. Firstly, an embedded multi-dimensional vibration PAD structure is designed, and its damping mechanism is expounded. A novel adaptive extended state observer (AESO) is then developed, and the corresponding MIMO-MADRC controller is designed to improve the serious peaking phenomenon caused by the constant high-gain extended state observer. Subsequently, active vibration control ground tests and wind tunnel tests of the proposed PAD system are performed. Results: The test results show that the proposed PAD system reduces the pitch and yaw vibration responses of the wind tunnel test model by more than 40%, ensuring a stable measurement of the wind tunnel model test data. Discussion: The developed AESO can effectively improve the inherent peaking phenomenon, and the designed MIMO-MADRC controller is superior to the traditional controllers and has strong anti-disturbance ability.