摘要
针对某大型运输机巡航段航迹优化问题,提出一种近似工程化的计算方法。分析了几种典型的巡航类型,并推导出精确的计算公式。对飞机气动参数和发动机特性进行了拟合建模,以燃油最省为性能指标,给出了在不同重量下的最佳巡航高度、最佳巡航速度、燃油消耗量、飞机需用推力等巡航表的主要参数,分析了巡航段的影响因素。研究结果表明,优化方案较好地降低了运输机燃油消耗和营运成本,增大了航程。
An approximate engineering method is proposed in this paper,in order to solve the problem of large transport cruise trajectory optimization.Several typical transport cruises were introduced and analyzed,and the accurate formula was derived.Aerodynamic parameter and engine characteristics were fitted and modeled.With the fuel optimal index,the main performance parameters at different weight,for example,the best cruise velocity,the best cruise altitude,fuel consumption and thrust required by aircraft,etc,were presented based on simulation,and the influence factors for cruise segment were analyzed.The result shows that the method provided in this paper reduces transport fuel consumption and operating costs,and increases the flight range.
出处
《飞行力学》
CSCD
北大核心
2012年第4期314-317,共4页
Flight Dynamics
基金
航空科学基金资助(20110896009)
关键词
大型运输机
巡航性能
航迹优化
燃油最省
large transport
cruise performance
trajectory optimization
fuel optimal
