虚拟飞行中气动、运动和控制耦合的数值模拟技术

Review of aerodynamics/kinematics/flight-control coupling methods in virtual flight simulations

随着计算机科学和计算流体力学的发展,以非定常数值模拟为核心,开展气动/运动/控制等多学科耦合的"数值虚拟飞行"模拟成为可能.数值虚拟飞行有助于飞行器设计师在设计之初和整个设计过程中分析和评估飞行器的非线性飞行力学和稳定性与控制性能.该文综述了国内外数值虚拟飞行中"气动/运动/控制"耦合的一体化模拟技术的研究进展,分析了其中的关键科学和技术问题,重点介绍了气动/运动/控制耦合一体化计算方法,并介绍了作者在一体化耦合计算方法方面取得的进展及初步应用情况.最后探讨了数值虚拟飞行中的一些挑战性问题,并对未来发展趋势进行了展望.可以预期,随着E级计算的到来,在不久的将来,数值虚拟飞行将给新型飞行器设计带来革命性的变化.

With the rapid development of computer science and computational fluid dynamics(CFD), the fully unsteady simulations of complex geometries, coupled with the solution of flight dynamics equations and flight control rules, have become possible. The CFD-based virtual flight simulation(VFS) would be helpful for engineers and designers to analyze and evaluate the nonlinear, flight dynamic behavior and the stability and control performance of the aircraft both early in the design phase and throughout sustainment. In this paper, we review the progresses of the aerodynamics/kinematics/flight-control coupling methods in VFS. The key scientific and technical issues in VFS are discussed, with an emphasis on the coupling strategies of aerodynamics/kinematics/flight-control. The authors' work in this field is introduced, together with some preliminary applications. Finally, we discuss several grand challenges in VFS, as well as future research trends. We believe that along with the presence of exascale computing, the CFD-based VFS will lead to a revolutionary change on the design of new generation flight vehicles in the near future.