俯仰运动

To study the taxiing-induced dynamic response of the aircraft with multiple wheels and multiple landing gears due to runway unevenness, base on several reasonable and necessary assumptions, the mathematical model of aircraft in taxiing is established using the d'alembert's principle. It can simulate taxiing inpact properties accurately, it considers in detail the vertical and horizontal motion and pitching about its center of gravity and the significant symmetric elastic modes.

在一些必要合理的假设下，利用达朗贝尔原理，建立了多轮多支柱式及小车式起落架飞机地面滑跑动态响应分析的全机模型，考虑全机沉浮、机体弹性和定常气动力的影响，起落架支柱的弹性变形，小车式起落架的车架的俯仰运动以及弹性变形，对等速滑跑飞机建立了全机运动的微分方程，并以旧金山28-R跑道为地面输入，利用时域积分的方法得到飞机滑跑的各种响应。

Bottom slewing crane with luffing jib and tower without backstavs.

与俯仰运动三角帆的底下旋转没有backstavs的起重机和塔。

A particularly investigation is carried out to the observibility of in-flight alignment using numerical simulation when the aircraft performs four kinds of basic maneuvre, namely linear acceleration, yawing, pitching and rolling. The thesis summarizes the two kinds of maneuvre. Simulation results show that the precision of transform alignment reach 5 minutes in 10 seconds if the aircraft performs two well-defined maneuvres.

首先本文采用数值分析的方法研究了直线运动、航向角运动、俯仰角运动和横滚角运动对传递对准系统可观性的影响规律；再结合飞机的实际运动，给出了空空导弹传递对准时的飞机飞行轨迹；"蛇形"飞行轨迹和摇摆运动飞行轨迹，仿真结果表明：按这两条飞行轨迹机动，在10s内传递对准精度可达到5′以下。

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。

The system in put in this case is turbulent air which produces random pitch in g 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。

The national defence basic project as background and the dynamic model of cotrolled transfer matrix for multiple launch rocket was created in order to reduce the initial disturbance of rocket projectile. The causes that affect the angle change of orientation locator were analyzed by the engineering system dynamic theory base on multibody system transfer matrix method. The simulation of dispersion for multiple launch rocket was implementation, and the affect law between the angle of elevation and side deflection and the control parameters was acquired. The control module was installed on the orientation locator of multiple rocket launcher to control the initial disturbance of rocket that provide new method and theory base and show the engineering system dynamic base on the multibody system transfer matrix method is effective.

本文以国防基础科研项目为背景，建立了通过控制定向器角运动来减小火箭弹起始扰动的多管火箭受控多体系统动力学模型，应用基于多体系统传递矩阵法的工程系统动力学理论，进行了定向器角度运动的影响因素分析，进行了受控多管火箭炮发射动力学和密集度数值仿真，得到了定向器俯仰和侧偏角控制参数对俯仰角和侧偏角的影响规律，为在火箭炮定向器上加装控制集成模块控制火箭弹的起始扰动和射击精度提供了新思路和理论基础，也表明了基于多体系统传递矩阵法的工程系统动力学理论的有效性。

The calculation results show that the hydrodynamic forces of purely heaving and pitching and its dimensionless frequency presente better linearity relation, and which indirectly verifies that this calculation method can be used to calculate the hydrodynamic coefficients of complicated shape submergible vehicle.

计算结果表明，纯升沉运动和纯俯仰运动的水动力与运动无因次频率呈现较好的线性关系，间接验证了所提出的计算方法适用于复杂外形潜器的水动力系数计算。

Furthermore, the variations of vertical displacement and pitch angle of aircraft are obviously reduced, and the comfort and operation performances an improved greatly.

同时还可以减小飞机重心的垂直位移和飞机的俯仰运动，进一步提高飞机的乘坐舒适性和操纵稳定性。

Bottom-slewing crane with luffing jib and towel' with backstays,- Bottom slewmg saddle jih cranes with out backstays, Bottom-slewing cranes with luffing jib

与俯仰运动三角帆的底部旋转与后牵索的起重机和towel，-与后牵索的底下slewmg马鞍jih起重机，与俯仰运动三角帆的底部旋转起重机

The invention concerns a device for damping the yawing motions between a motor road vehicle and its trailer consisting of a damping curvilinear track (4) whereon acts a friction device (17) for example a pneumatic device mounted at the end of the towbar (2), the track (4) being for example articulated to a fixed part at the rear of the truck or sufficiently flexible to absorb roll and pitch.

本发明涉及在机动车和它的拖车之间的左右摆动缓冲装置，该装置包括一个曲面形缓冲道(4)，一个装在连杆(2)的端部的气动摩擦装置(17)作用在该缓冲道上，以铰接的方式将缓冲道(4)连接到卡车后面的固定部位上，缓冲道也可以足够柔软，以便消除侧滚或俯仰运动。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。