Flutter suppression of blade section based on model prediction control

Abstract

Flutter suppression of wind turbine blade section based on two types of model prediction control (MPC) algorithms is investigated. The pre-twist blade, exhibiting displacements of flap-wise bending and lead-lag bending, employs 2D airfoil analysis method, and is subjected to destructive divergent instability displacements. Dynamic modelling of two-dimensional (2D) blade section is based on data analysis characterized by data fitting. The MPC methods including standard MPC and terminal-weight MPC are used to realize flutter suppression for divergent instability. Vibration control and control effects of terminal-weight MPC on divergent instability are analyzed in detail, with different parameters of prediction horizon and control horizon discussed. The superiority of terminal-weight MPC can be apparently demonstrated by comparison of standard MPC and sliding mode control with disturbance observer (SMCDO). The feasibility of hardware implementation of MPC algorithm is discussed by human-computer interaction platform. The performance improvement method of the terminal-weight MPC based on offset control has been refined from the point of view of practical application, with its remarkable effect compared with the original terminal-weight MPC.

Vibration control of cantilever blade based on trailing-edge flap by restricted control input

“…It was a simulation platform using controller-hardware-in-the-loop technology based on virtual simulation and OPC method and MATLAB/SIMULINK (MS) environment. 24,25 To avoid the failure of the algorithm in the hardware implementation due to the problem of hardware memory limitation and cumulative error of calculation in the hardware just mentioned, the virtual simulation platform is used in the present study to verify the feasibility of the hardware implementation of the LMI/RCI algorithm.…”