The system input in this case is turbulent air which produces random pitching motion of the vehicle.
在此情况下，系统的输入是紊流大气，它使飞行器产生随机俯仰运动。
For pure pitching motion, the results show that average drag coefficient decreases as airfoil thickness is reduced.
在低雷诺数条件下，对于纯俯仰运动，随着翼型厚度的减小，平均阻力系数也变小。
In this paper, by analyzing the forces on hydrofoil catamaran, the mathematical model of its heaving and pitching motion is proposed.
从高速水翼双体船受力分析的角度，提出了其静水中垂荡和纵摇运动的数学模型，其中对水翼所产生的升力进行了较为详尽的分析。
We have an empirical knowledge that the rear suspension should have a higher spring rate than front one, in order to reduce pitching motion.
为了减少俯仰运动，后悬架应该比前悬架有较高的弹簧刚度。
During the pitching motion, the resistance force, weight of the pitching arm and the contraction force of muscles set up a combination force along the pivot of the humerus.
在肩部的运动中，阻力，重力和肌肉的收缩力集中于肱骨轴线，通过盂肱关节面转换为与关节盂面垂直的压力和与关节盂面平行的剪力，作用于肩部活动的全过程。
This article mainly introduces the principle of the prediction for auto regression modeling and recommends the AR arithmetic of prediction for ship pitching motion in detail.
介绍了自回归时间序列分析法的建模预报原理，并给出了船舶纵摇运动预报应用实例。
The results show that unsteady aerodynamic characteristics of a delta wing oscillating in large amplitude pitching roll motion are more complicated than in pitching motion or in roll motion.
结果表明，飞行器俯仰滚转耦合运动时的气动特性比单独俯仰和滚转时的气动特性复杂得多。
The bouncing overall power is nearly maximized at the optimum frequency ratio of the minimum pitching overall power. The higher rear-frequency and the higher rear-damping ratio reduce pitching motion.
跳动总功率在最小俯仰总功率的最佳频率比时，几乎达到最大值，较高的后频和较高的阻尼比减少了俯仰运动。
The pitching and heaving motions of a catamaran are calculated with the STF method, as well as the statistic characteristics of motion in the irregular waves.
采用STF方法计算船舶的纵摇和垂荡运动及船舶在不规则波中的统计特性，计算与试验相比较，结果令人满意。
The problem of unsteady separated flow of rapidly pitching airfoil with oscillating motion is computationally studied.
对带振荡的快速上仰翼型的非定常分离流问题进行了计算研究。
The moving overset grid method is employed to account the relative motion among the blades which are rotating, cyclic pitching and cyclic flapping.
为了模拟前飞桨叶间的相对运动，网格布局采用了运动嵌套网格方法。
Using the model the unsteady aerodynamics of one aircraft in pitching-rolling motion is identified.
应用该模型对某飞机模型做俯仰滚转耦合运动的非定常气动力进行了辨识。
Using the model the unsteady aerodynamics of one aircraft in pitching-rolling motion is identified.
应用该模型对某飞机模型做俯仰滚转耦合运动的非定常气动力进行了辨识。
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