对准

Remove the carburetor and backplate assembly. Notice the impression made on the crankshaft counterweight.

拆开化油器、引擎被盖\可看到引擎主轴配重端边缘有一圆点，将这点对准引擎机壳正下方，或对准机壳下方的模具接合线。

Using dead reckoning algorithm,a novel method is presented to implement the dynamic initial fine alignment for vehicular navigation system.

针对载车在运动状态下的初始对准问题，提出了利用航位推算算法进行精对准的新方法，阐述了航位推算轨迹和真实轨迹相似的原理。

The calculation of initial alignment direction cosine matrix between SINS body frame and navigation reference frame is expanded into three parts:(1) the DCM between i0 frame and n frame is easily obtained via local geographical coordinates and initial alignment time;(2) by expressing SINS specific force equation in b frame and by the aid of external velocity log, the constant DCM from i(subscript 0) frame to i0 frame is achieved;(3) attitude updating using gyro samples gets the DCM between b frame and i(subscript b0) frame.

将捷联惯组坐标系与导航坐标系之间的初始对准姿态矩阵的实现分解为三步骤：(1)通过地理位置和初始对准时间求解i0系至n系的变换矩阵；(2)通过惯导比力方程变形，引入刚速仪速度辅助，求解从i(下标 b0)系至i0系的常值变换矩阵；(3)使用姿态更新算法实时计算b相对于i(下标 b0)系的变换矩阵。

The eyepiece has an optical axis , and this axisshouldbe aimed at the center of the main mirror for best performance - though in practice it is the center axis of the focuser drawtube that you aim at the primary mirror .

目镜和主镜一样也有光轴，光轴应该对准主镜的中心--尽管实际上，目镜的光轴对准的是调焦筒的中心。

On the base of INS, the method of initial alignment is introduced. And the state equation and observation equation are proposed. Using velocity error as exterior value of observation, We achieve the initial alignment.

在实现INS的基础上，研究INS和GPS组合的初始对准方法，建立组合导航系统的状态方程及速度观测方程，应用卡尔曼滤波器实现了INS／GPS的组合对准。

Choosing output error of Accelerometers and angle error of attitude as observation respectively and system observation model is derived, which is based on analyzing Kalman filter theory. Simulation show that the results are true and validated.

本文对捷联惯导系统动基座初始对准进行了研究，对卡尔曼滤波技术在动基座初始对准中的研究与应用具有一定的参考意义。

The device is fabricated by nonsilicon surface micro-machining, which uses the photoresist and the sputtered copper thin films as the scarificial layers, and the electroplated ferronickel as the structure layer to fabricate the optical MEMS components. The device consists of an electroplated ferronickel optical shutter interposed in a gap between two fiber alignment componets, an electroplated planar coil, a silicon spring, and two fiber alignment components with V-shaped grooves.

该衰减器利用非硅表面微加工工艺(这种工艺采用光致抗蚀剂和溅射铜薄膜作为牺牲层，电镀铁镍层作为结构层来制作MEMS元件)制作，由电镀铁镍层构成的一个插在两对准光纤空隙中的挡光片，一个平面电感线圈，一个硅弹簧和二个带有V型槽的光纤对准元件构成。

However, during the initial alignment and navigation of missiles, noise of FOG's output signal affects the accuracy seriously.

但是，在导弹的初始对准与导航过程中，光纤陀螺的输出噪声严重影响了对准与导航的精度。

Simulation result proved that the wavelet method has better performance in removing the noise of FOG's output signal, and the accuracy of alignment and navigation can be improved.

研究表明，基于小波的去噪方法能够更好地估计光纤陀螺的输出信号，具有更为理想的去噪效果，有效地解决了对准与导航过程中光纤陀螺噪声的影响，提高了对准与导航的精度。

To fulfill the requirements of the motion compensation, the related errors of the IMU equipments are quantitatively analyzed meanwhile.

初始对准是捷联惯性导航的关键技术之一，初始对准的精度直接影响导航系统的工作精度。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。