基于状态空间涡格法的阵风减缓分析

Gust response and gust load alleviation control system design is an important issue in aeroelasticity. This paper presents a gust response model based on the vortex lattice method (VLM) in state-space formulation and gives the couple relationships between finite element method modes/control surface modes and boundary conditions of VLM, which can be applied to complicated aircraft model. This method can avoid the disadvantages of the traditional gust response analysis method with no requirement of rational function assessment and iteration calculation with lots of resources. Introducing the traditional PID control algorithm, a gust load alleviation system is given, and gust time response of open loop/closed loop under a discrete gust and von Karman continuum gust excitation are presented. The alleviation effect can be solved by contrasting the response amplitude. The simulation results show that gust response analysis results based on this method are accurate and the gust load alleviation control system can alleviate the load response of the original aeroelastic system effectively.