连杆运动

A new mechanical structure with winch、staff and gimbal is used to develop a gyrometer test table to realize the high frequency of the operation. A "soft-measurement" is used to reach the high precision and this idea enhances the reliability too. By controlling the servo amplifier the control system is designed simply.

为了使测量双轴摇摆台实现高频率的运动，机械结构上设计采用了一种新型的曲柄、连杆、万向节机构；为保证系统的高精度和可靠性提出了&软测量&补偿方法；通过伺服放大器直接控制电机，简化了控制系统的设计。

Researches are made to find out the active tracing measurement strategy of crankshaft roundness error during noncircular grinding process .

本文对曲轴连杆颈非圆磨削过程中圆度误差的在线跟踪测量策略展开研究，推导了测量系统跟踪运动方程，针对在频域分析时对3个传感器之间线性相关性的要求，论述了满足均匀采样的约束条件。

Through Hilbert transform, a signal's plane trace can be get. There are two frequencies in the tested signal, so the signal's plane trace may be looked as the track of the out pole's end when two poles rotate around parallel axles. Using the knowledge of motion synthesis in theory mechanics, a formula to describing the change of plane trace's step length and angle for two-frequency be get. So we may prolongate the tested signal's plane trace from the echo's initial arriving moment, and get a certain length of the signal's prolongation.

通过Hilbert变换可得到测试信号的平面迹线，测试信号中只含有两个频率成分，视为双频信号，双频信号的平面迹线相当于两连杆绕平行轴转动时外杆杆端迹线，利用理论力学中运动合成和瞬心知识，推导出双频信号平面迹线步长平方满足余弦线性复合函数，而迹线转角可视为线性变化，据此可对回波到来之前的测试信号平面迹线作延长，得到一定长度的信号延展段，信号延展段与实测段作差可得到一次、二次回波的第一个波峰值。

In this system , cylinder walls are lubricated by splashing oil throw n off from the connecting-rod bearings.

在这一系统中，气缸壁是由连杆轴承运动飞溅起来的油进行润滑的。

The flexible shafts have better strength and rigidity than ordinary level, they are ideal substitute for conventiona level and universaljoint with such merits as : light weight, good flexibility, easily crooking, compact constru—ction, easily installation, good seal, proof rust and anti—deformation, neatly operation.

工作原理：机械操纵系统中的连接部位受力位移时，软轴的芯轴受力，产生往复运动，形成拉力、推力驱使机械作换挡、取力、升降、行走、加油、熄火、制动、转向、换向等工作，它不但优于一般杠杆的强度、刚性而且重量轻、柔性好、可弯曲、结构紧凑、安装方便、密封性好，不易锈蚀变形，操作轻便灵活，是替代传统的连杆、万向节机构的理想产品。

The results simulated with MATLAB demonstrate that the proposed mathematical model and connecting rod parameters are reasonable,all joint motions are correct and cotton-picking is realized.Based on the kinematics research of the single manipulator,the path planning and aiming to avoid obstacle will be investigated.

根据D-H法则和机械手的结构参数，建立了单机械手的运动学模型，采用反变换法求解运动学逆问题，利用MATLAB仿真，验证了所建模型和所有连杆参数的正确性，保证了机械手各关节的准确运动，实现了棉花的实时、高效采摘，并且可以在上述机械手运动学模型基础上开展轨迹规划和避障等技术研究。

A plane quadric crank mechanism consists of four rigid components connected by a rotary pair and a moving pair.

平面四连杆机构是由四个刚性构件通过转动副，移动副联接，且各构件上各点运动平面都相互平行的机构。

The new machine can cut a taper with its top point fixed. The cutting motion of torch is realized by the composite revolving of the two orthogonal axes.

依据数学模型对机构的结构进行优化设计，机构采用平面的平行四边形机构，通过回转轴和连杆的转动合成割枪的切割运动。

In the internal-combustion engine, crank-connecting rod mechanism is the main moving mechanism, of which the piston is the part that working under the worst conditions.

曲柄连杆机构是内燃机的主要运动机构，而活塞是该机构中工作条件最恶劣的零件。

In this dissertation, a new approach is presented by means of shape of centrodes on moving rigid body. By genetic algorithm, a series of good initial points can be produced automatically.

本文在连杆机构运动分析基础上，利用瞬心线的形状和位置特性确定实始搜索范围，并结合遗传算法的随机搜索特点来构造优化过程。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。