CAJ | 학술논문

针对高超声速滑翔飞行器再入轨迹规划问题，提出了一种基于微分平坦理论的三自由度轨迹生成方法。在分析纵向运动简化模型的微分平坦属性基础上，将纵向参考轨迹规划问题映射到平坦输出空间，消除微分动力学约束的同时降低系统设计的维数，进而提高求解效率；采用全局插值多项式参数化平坦输出函数，将问题转换为非线性规划问题求解；设计比例-微分反馈控制律跟踪纵向参考轨迹，同时采用航向角误差走廊控制侧向运动，实现三自由度轨迹生成。仿真分析表明所提出的方法能够较快生成满足多种约束且性能优化的飞行轨迹。
침대고초성속활상비행기재입궤적규화문제，제출료일충기우미분평탄이론적삼자유도궤적생성방법。재분석종향운동간화모형적미분평탄속성기출상，장종향삼고궤적규화문제영사도평탄수출공간，소제미분동역학약속적동시강저계통설계적유수，진이제고구해효솔；채용전국삽치다항식삼수화평탄수출함수，장문제전환위비선성규화문제구해；설계비례-미분반궤공제률근종종향삼고궤적，동시채용항향각오차주랑공제측향운동，실현삼자유도궤적생성。방진분석표명소제출적방법능구교쾌생성만족다충약속차성능우화적비행궤적。
For the trajectory planning problem in hypersonic glide vehicle,a differential flatness based three-degree-of-freedom trajectory generation approach is proposed.Based on the flatness analysis of the simplified longitudinal motion model,the reference longitudinal trajectory planning problem was mapped into the flat output space to improve the solving efficiency by eliminating the dynamical constraints and reducing the design dimension.Then the initial problem was transformed into a nonlinear programming problem utilizing global polynomial approximations to the flat outputs.To compensate for the effects of the earth rotation and external disturbances,a Proportion-Differentiation control based reference trajectory tracking controller was designed with good convergence capability.By integrating the lateral motion determined by the error corridor of heading angle based bank angle revision,the three-degree-of-freedom gliding trajectory was ultimately generated.Numerical simulations were conducted to validate the feasibility and effectiveness of the approach presented here.