高保真气动伺服弹性系统降阶技术研究

摘要

采用高保真非定常气动力辨识技术获得的气动伺服弹性(ASE)系统时域模型往往阶次较高,不利于控制系统设计的应用.为了有效降低高阶ASE系统阶次,研究了高保真ASE模型的降阶特性,分别采用平衡截断、奇异摄动以及平衡奇异摄动模型降阶技术,结合BACT系统讨论了各种方法在ASE模型降阶中的应用情况,通过仿真比较得知,平衡奇异摄动法应用于ASE模型的降阶具有一定的优势,可以大幅降低模型阶次,且能够保证降阶模型的精度.%The high-order Aeroservoelasticity (ASE) model obtained by using the high fidelity unsteady aerodynamics from system differentiating and analyse is disadvantaged for the control system designs.In order to achieve order reduction of ASE system effectively,reduction characteristics of high fidelity ASE model have been studied in this paper.The balanced truncation reduction method,the singular perturbation method and the balanced singular perturbation method have been mentioned,and these three methods have been applied in the ASE model reduction combining with BACT system.Simulation results show that the balanced singular perturbation method used in the ASE model reduction has more advantages.It can reduce the order of model greatly,and ensure the precision.