摆

Much to our astonishment, one brooder even posed for us for a good 2-3 minutes, striking different poses as he puts forward his 'very best' for the album!

但是，最为我们惊讶的是，竟然有一尾种鱼为我们而摆了2-3 分钟的摆姿，还连续摆不同的姿势以展出他的'最好'摆姿，以做留念！

According to the construction constituted and the drive principles, the formation methods of the theoretical tooth shape and the practical tooth profile for hypocycloid and epicycloid are studied, and the right-angle coordinate equations and the complex number vector equations are deduced respectively.

根据摆线钢球行星传动的结构组成原理和啮合传动原理，研究了构成钢球摆线槽端面啮合副的内、外摆线理论齿形和实际齿廓的形成方法，并分别推导出内外摆线理论齿形和实际齿廓的直角坐标方程和复数矢量方程。

So to heighten the theoretical level of controls, we have to apply some control methods which realize the stabilization of the inverted pendulum by dint of our strength.The paper is based on the double linear inverted pendulum model, after concisely introducing the development and current situation of inverted pendulum system research, the mechanism and mathematical model of inverted pendulum are presented,mathematical model of the double inverted pendulum is particularly educed.

近年来，许多学者已经应用各种各样的控制方法对倒立摆系统进行广泛地研究，尽管国内外对倒立摆的研究已有显著成果，但作者对倒立摆的研究才刚刚起步，需要在学习和总结已有经验的基础上，研究倒立摆的控制，以提高控制理论的水平。

The second order mathematical models of inverted pendulum system are expatiated in this paper based on the theory of LQOC(Linear Quadratic Optimal Control), LQY(Linear-Quadratic Yield) controller and LQR(Linear-Quadratic Regulator) are designed to make the inverted pendulum system closed loop stable.

针对倒立摆的稳定控制问题，阐述了二阶倒立摆的数学模型，采用线性二次最优控制理论，设计了倒立摆控制系统的线性二次型调节器和线性二次型输出器，使倒立摆系统闭环稳定。

The shaker includes a dual mass flywheel and the rotate and pendulum driven mechanism; in the rotate and pendulum driven mechanism, the rotary cylinder body of the rotatable hydraulic rotary cylinder (8) is connected with the sub flywheel (15) connecting with the main flywheel (13) and a rotary cylinder shaft (4) at the same side through a transmission sleeve (11) connecting to the rotary cylinder right end cover (9); a torsional transducer (10) and a turbulence iron core of an angular sensor (12) are arranged on the sub flywheel shaft, a winding of the angular sensor is positioned on the transmission sleeve fixedly connected with the main flywheel.

该激振器包括双质量飞轮及其旋转和扭摆驱动机构；所述旋转和扭摆驱动机构，其旋转液压摆缸(8)的摆缸体通过与摆缸右端盖(9)相连的传动套(11)，在同侧与主飞轮(13)和与摆缸轴(4)相连的次飞轮(15)相连接；扭矩传感器(10)及摆角传感器(12)的扰流铁芯装在次飞轮的轴上，摆角传感器的线圈装在与主飞轮固连的传动套上。

In the process of the developing of NC machine tool which machines the sleeve of synchromesh of automobile ,efficient methods making use of hypocicloide are introduced.

介绍了用摆线轨迹形成原理加工滑块槽及倒锥的工作原理；结合汽车同步器齿套数控加工机床的研发，提出了利用摆线逼近圆弧和渐开线的高效加工方法；并通过建立摆线的参数方程，分析了其各个参数对摆线形状的影响，进而证明了利用这种方法加工同步器齿套的可行性。

Cycloid cluster is a new concept presented in this paper, which is a set ofcycloids. To process the back-angle accurately and efficiently, the parameters ofcycloid are adjusted to make the envelope curve of cycloid approximate involute .

使用摆线簇包络线逼近渐开线是本文提出的一种新方法，摆线簇就是一组摆线，通过调整摆线簇中每条摆线的参数，可以使摆线簇中摆线包络线高精度的逼近渐开线，进而实现倒锥的加工。

This article also summarized the typical existing processing technology of the balance wheel parts of the mechanical watch, and researched the structure and material of the balance wheel parts, then designed a special balance wheel made of titanium alloy and the advantages of which was analyzed.

本文主要内容有总结了现有机械表摆轮零件典型的加工工艺，并对摆轮零件的结构和材料进行了研究。设计了一种应用钛合金材料的机械表摆轮，并通过计算，分析了这种摆轮的优点。

This article mainly carried on has put down work the seat, introduced stood upside down suspends the system each control method, has carried on a more detailed introduction to the condition space law; Has used Newton - the Euler method modelling; Proposed realizes with the condition space control method to a level stands upside down suspends the system the stable control, and has carried on the simulation experiment; In the experimental simulation, through change parameter R and Q, stands upside down with the condition space control method in the reality suspends on the system to carry on the confirmation, has realized the swing link balancing control, confirmed this plan to have the certain antijamming ability.

本文主要进行了以下工坐，介绍了倒立摆系统的各种控制方法，其中对状态空间法进行了较为详细的介绍；采用了牛顿-欧拉方法建模；提出用状态空间控制方法来实现对一级倒立摆系统的稳定控制，并进行了仿真实验；在实验仿真中，通过改变参数R和Q，用状态空间控制方法在实际倒立摆系统上进行验证，实现了摆杆的平衡控制，验证了该方案有一定的抗干扰能力。

Arguably, the nozzle to limit position paper, as soon as possible, and it's jitter destroyed the suction nozzle swing movement and the co-ordination of the aliquation valve, causing the pendulum back through the nozzle, the paper could not be immediately spoiledour suction nozzle feed to end just swing pressure wheel has come down upon the relationship between the paper over, resulting in a swayig press paper round has not yet been pressed paper, paper suction nozzle the cardboard in place, and with live paerboard to move back a little bit, causing a pause.

按理说，吸嘴摆到极限场所答当即不收纸，而这种抖不静爱护了吸嘴摆不静不静息与呼气阀的打扰，使得吸嘴往回摆时，未能当即不收纸，爱护了吸嘴送纸到尽脚时摆不静压纸轮恰好压住纸的移交干系，导致摆不静压纸轮还来压住纸，递纸吸嘴不离已把纸板送到位，并带住纸板此后定一下，引起迟滞。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失