例句與造句

1. use energy-based control method to achieve the entry flight control of reusable launch vehicle . the basic concept is to take the energy as primary control variables, reduce the order of the system and design a tracking law to follow a three-dimensional entry trajectory
   本文采用基于能量的控制方法實現(xiàn)對航天器再入軌跡的控制，將能量作為獨立參量，從而降低系統(tǒng)的階數(shù)，利用線性反饋的方法設計一個跟蹤三維再入軌跡的控制律。
2. the method of wing shape optimization of space shutlle has been developed with penalty function approach in which the objective function is the mass of the wing and the constraints are the hypersonic re-entry flight cross range, lift / drag ratio, and subsonic flight lift / drag ratio, the margin of the longitudial static stability and the magnitude of the horizontal landing speed etc
   摘要介紹了在滿足高超音速再入橫向機動航程，高超音速再入飛行時的升阻比，亞音速進場飛行時的升阻比，縱向靜穩(wěn)定性裕度和水平著陸速度等飛行性能設計要求下，用罰函數(shù)法尋求使航天飛機機翼質量為最小的外形優(yōu)化方法并給出了算例。
3. It's difficult to find entry flight in a sentence. 用entry flight造句挺難的