1) Pitch vibration
仰俯振动
2) pitching vibration
俯仰振动
1.
The ultrasonic transducer of TS2100 gold wire bonder was taken as the main object of study, impedance analyzer and LDV(Laser Doppler velometer) were taken as measuring equipments, to research systematically electrical characteristics and pitching vibration of the ultrasonic transducer.
(3)搭建了相应的实验测量系统，选择敲击方式激励换能系统，产生俯仰振动，用激光多普勒测速仪采集换能系统末端底部的速度信号，对速度信号进行统计功率谱分析，分析有无劈刀情况和肋环夹持不同状态下换能系统。
3) pitching
[英]['pitʃiŋ] [美]['pɪtʃɪŋ]
俯仰振荡
1.
Unsteady simulation of the pitching intake;
进气道俯仰振荡状态的非定常数值仿真
4) pitch
[英][pɪtʃ] [美][pɪtʃ]
俯仰运动
1.
The coupling dynamics of the pitching of spacecraft,the sloshing of liquid fuel and the vibration of elastic appendages are investigated in this paper.
采用已推导的俯仰运动矩形贮箱受控刚-液-弹耦合系统在外力矩作用下的耦合动力学模型,在刚体上加入控制项,详细分析了系统固有频率的精确解与近似解。
2.
In the case of pitch excitation,the modified potential function and wave height function were introduced to describe the moving boundary of fluid.
首先建立了俯仰运动矩形贮箱刚-液-弹耦合系统在外力矩作用下的耦合动力学模型,给出满足边界条件的速度势函数和液面波高的级数表达式,采用伽辽金法离散,将动力学模型转化为常微分方程组,得到刚-液-弹耦合系统的固有频率,给出简单的近似表达式,分析了转动中心距静液面不同位置时刚-液-弹耦合系统各阶固有频率的变化规律,系统转动中心距静液面较近时,耦合后液体反对称模态和刚体的固有频率对比耦合前减小,较远时则增大,最后进行数值验证,比较分析了液体和弹性体对刚体姿态的影响。
5) pitching motion
俯仰运动
1.
The results of pitching motion show that the frequency and amplitude of pitching motion are very important factors for the pressure distribution and lift coefficient.
在南航非定常风洞内研制、开发了一套两自由度电控液压动态实验台,利用该设备,完成了翼型俯仰运动、沉浮运动以及俯仰沉浮耦合运动测压实验,并积分计算了翼型动态运动过程中的升力系数。
6) pitching movement
俯仰运动
1.
The paper presents the expressions of the pitching movement and velocity equation for shotcrete robot, derived its matrix of Jacobian, and conducted the curve analysis of movement and velocity properties by means of the MathCAD.
提出喷浆机器人俯仰运动方程和速度方程的表达式,求出了其雅克比矩阵,并利用MathCAD对其运动特性和速度特性进行了曲线分析。
2.
Aiming at the pitching movement model,a nonlinear variable structure controller with an optimal sliding surface for the pitching control system of missile was presented.
针对俯仰运动模型,提出利用非线性最优滑模控制来设计某型导弹的俯仰运动控制系统。
补充资料：俯摄照片
俯摄照片(Bird’s-eye-view photography)指的是从高处往下俯视宽广的范围进行拍摄的照片。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条