软管-锥套式空中加油动态建模与性能分析

提出了一种基于凯恩方程的自主空中加油软管-锥套动态模型及性能分析方法。该方法将软管视为由有限段以铰链形式连接的刚性 杆组成，锥套为软管末端的一个质点。本文定义了描述系统状态的广义坐标及广义速率，导出了软管段位置多级递推公式和系统动态方程，估算了软管在加油机尾流、定常流和大气扰动下的气动载荷。通过数值仿真分析了平稳大气中锥套在加油机不同飞行条件下的稳态阻力和软管拖拽轨迹，验证了模型的正确性及系统稳定性。最后研究了大气扰动对锥套运动的影响及不同软管段的受扰运动。

Dynamic Modeling and Performance Analysis of Hose-Drogue Aerial Refueling System

A dynamic model and the performance analysis method of hose-drogue aerial refueling system are proposed based on Kane equation. In the method, the hose is modeled by the finite segment of rigid bar connected with hinge, and the drogue is regarded as a mass point at the end of the hose. Then both system generalized coordinates and generalized rates are defined, and a set of multi-level recursive formulas of hose-bar position and dynamic equations are derived. Furthermore, external aerodynamic loads that account for the effects of tanker wake, steady wind and atmospheric turbulence of each hose-bar are estimated. Numerical simulations show good correctness and stability of the dynamic model by steady-state resistance and equilibrium position of hose-drogue under different flight conditions in steady wind. Finally, the displacements of the drogue and the motion of various hose-bar resulting from atmospheric turbulence are investigated.