Design of Active Control Law for Aeroelastic System Based on Proper Orthogonal Decomposition Reduced Order Model

Currently the highest accurate method for complex aeroelastic system is CFD/CSD coupled numerical simulation. But it is also the least efficient method .So it can’t be directly used to design the active control law for aeroelastic system. In order to solve the problem, A reduced order model (ROM) based on time-domain proper orthogonal decomposition (POD) was investigated in this paper. Because the order of time-domain POD/ROM is much higher than frequency-domain POD/ROM, the POD-BT/ROM was developed by introducing the balanced truncation method in control theory. And then the lower order aeroservoelastic model based on POD-BT/ROM was build. The detail of the construction of time-domain POD/ROM and the design of active control law was demonstrated by AGARD 445.6 wing. The numerical results show that the POD/ROM nearly has the same accuracy as the CFD/CSD coupled method and improves the computation efficiency about 1-2 order of magnitude. It’s a high efficient and accurate active control law design tool for aeroelastic system.