平流层飞艇上升段轨迹优化  

Ascent Trajectory Optimization for Stratospheric Airship

作　　者：郑黎明[1] 杏建军[1] 陈子昂[1] 于洋[1] 

机构地区：[1]中南大学航空航天学院,湖南长沙410083

出　　处：《计算机仿真》2016年第12期80-84,共5页Computer Simulation

基　　金：中国博士后基金(20080440217;200902666)

摘　　要：在平流层飞艇在可控净浮力情况下的上升段轨迹优化问题的研究中,为了用最小能量和最短时间到达平流层,引入净浮力系数描述飞艇的可控制净浮力,完善了平流层飞艇的轨迹优化模型,并对参数处理后给出了归一化系统方程;其次采用直接配点法将轨迹优化问题转换为非线性规划问题,针对优化问题给出初值选取策略以便于快速得到可行解,然后基于最小时间情景对净浮力为零和净浮力可控两种情况进行求解和对比分析;最终仿真结果表明净浮力可控场景相比净浮力为零在时间上缩短了21.7%,能量消耗减少了19.7%,可以在节省能量消耗的情况下,实现平流层飞艇的快速升空。The ascent optimal trajectory of stratospheric airship was researched by introducing controllable net buoyancy. Firstly, the factor of net buoyancy was intended to express the net buoyancy so that the trajectory optimiza- tion model of airship was improved. Then the variables were scaled to obtain a normalized system equation. Secondly, this optimization problem was transformed into a nonlinear programming problem by using direct collocation method, and then the initial value selection method was given to get the feasible solution for this optimization, the zero net buoyancy and controllable net buoyancy were taken into consideration in the simulation of minimum time scene. Eventually, from the optimization results, compared with zero net buoyancy, the controllable net buoyancy scene can reduce time by 21.7% and energy by 19. 7%, and fast release of airship can be achieved with less energy consumption.

关 键 词：平流层飞艇 可控净浮力 轨迹优化 

分 类 号：V19[航空宇航科学与技术—人机与环境工程] V279