飞机纵向飞行剖面被假定分为三个飞行段：爬升、巡航和下降；
The vertical flight profile was assumed to have three flight segments climb, cruise and descent.
飞机以接近海平面的机场高度开始飞行、爬升、巡航、下降和接近海平面的机场着陆。
The airplane starts its flight at an airport altitude near sea level, ascends, cruises, and descends to a landing airport near sea level.
经分析计算与试飞结果表明，对于爬升较缓慢的飞机，本控制方案可实现沿优化性能轨迹上升，并自动转入有利速度巡航。
It is shown that the climbing control plan is applicable to the aircraft with slower climbing according to optimum performance trajectory and automatically fly with optimum cruising velocity.
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