非定常气动力状态空间模型及其在气动伺服弹性建模中的应用  

State Space Model of Unsteady Aerodynamics and Its Applicationto Aero-servo-elasticity

作　　者：陈刚[1] 徐敏[1] 陈士橹[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《空军工程大学学报（自然科学版）》2004年第5期1-4,共4页Journal of Air Force Engineering University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10272090)

摘　　要：研究了一种基于CFD/CSD耦合计算的气动伺服弹性系统建模的一般方法。该方法将气动伺服弹性系统看作气动、结构、控制三个相互耦合的环节,分别建立各个环节状态方程再组装成完整的气动伺服弹性系统模型。着重讨论了非定常气动力状态空间模型建立的系统辨识方法,并对非定常气动力脉冲响应计算进行了深入的探讨。通过将CFD/CSD耦合直接计算与状态方程计算的结果进行对比,表明该方法得到的模型精度好、效率高、易于使用、可扩展性好。A general aeroservoelastic model construction method based on CFD / CSD couple simulation is investigated. The aeroservoelastic system is divided into three parts including aerodynamic, structure and control subsystems whose state equations are built separately and then are integrated into an integral aeroservoelastic system model. The system identification method of the state equation of the unsteady aerodynamics is investigated, especially the identification of the impulse response. A simple moving mesh generation method and an improved CVT method exchanging data between aerodynamic grid and structure grid are applied in the CFD / CSD program. The comparison between the results of the state equation and the direct simulation indicates that the model obtained by this method is good in accuracy, easy in usability and high in efficiency.

关 键 词：CFD/CSD 非定常气动力 系统辨识 ERA算法 气动伺服弹性 

分 类 号：V24[航空宇航科学与技术—飞行器设计]