平面五杆机构的机构变换及选型

阐述了五杆机构的型；在五杆机构型综合的基础上，根据同一构件上两移动副元素的外形结构不同，拓展了五杆机构型的范围，并能通过机构变换而得到更多类型的五杆机构。确定了机构的选型原理，据此可以找到具有可控性、柔性、智能化特点的机构。     

平面四杆机构刚体导引综合的小波特征参数法

针对傅里叶级数理论不能进行非整周期刚体导引综合的问题,提出了基于Haar小波级数的解决方法,将早期提出的解决平面四杆机构轨迹综合问题的方法扩展到平面四杆机构的刚体导引综合中。通过对刚体转角和其对应基本尺寸型的连杆转角小波系数进行分析,发现了二者的内在联系。在此基础上建立了101 408组基本尺寸型的平面四杆机构刚体导引输出特征参数数据库。将位置输出问题转化为平面四杆机构轨迹综合问题,并给出了计算平面四杆机构实际尺寸和机构安装位置参数的理论公式。利用建立的数据库和理论公式,实现了平面四杆机构非整周期刚体导引综合。以生产线上的输送工件的铰链四杆机构为例,证明了本文方法的有效性和可行性。     

球面四杆机构的空间模型及尺寸型

基于特征球面四杆机构的概念，将球面四杆机构分为三类，并建立机构的尺寸型空间模型。每个空间模型可划分为若干个子区间，每个子区间都对应着一族球面四杆机构。按本文提出的尺寸型表示方法，可在全封闭图面内表示球面四杆机构的尺寸型，并在其上绘制出有工程应用价值的机构性能图谱。     

曲柄摇杆机构在轴承摆动试验机上的应用

根据摆动试验机的设计要求，采用了曲柄摇杆机构来实现。通过对曲柄摇杆机构中的对心型曲柄摇杆机构的几何特征的分析，用解析法求出了各杆的杆长和最小传动角，介绍了一种用图解法来实现调节摇杆摆角的方法。     

识别平面多杆混合驱动机构的元桁架消去法

对于平面2自由度九杆机构,混合驱动机构的识别是其研究与应用的难点.文中提出了一种基于消去元桁架的混合驱动机构判断方法.先确定一个原动件,然后通过消去元桁架得到原动件组合,在此基础上根据连架杆和非连架杆判断准则确定混合驱动机构.以七杆机构为实例,验证了该方法的有效性.最后将该方法运用于平面九杆机构,以机构的3种自由度类型为基础,考虑连架杆输出和非连架杆输出两种情况,分别得到10种和33种混合驱动机构,为平面九杆混合驱动机构的分析与设计打下了基础.     

面向对象机构运动分析自动化方法研究

以八杆机构为例，将由机构性定向发散得到的每一个机构型作为基本运动分析对象，以橇架理论和基本杆组理论对其进行运动分析，采用面向对象的ＶＣ＋＋编程技术的对其封装，应用雅格比矩阵辨识机构和传递机构几何特征信息，实现了机构运动分析的自动化。     

平面多杆机构的平衡性能研究

本文应用质量动替代法，采用质量分布和附加齿轮机构与凸轮弹簧机构，以Ｓｔｅｐｈｅｎｓｏｎ型六杆机构为例对平面多杆机的摆动力，摆动力矩和输入扭矩进行了完全平衡。     

平面五杆机构类型判别方法的研究

提出并验证了平面二自由度五杆机构双曲柄存在的充分条件，提出平面五杆机构的类型不仅与五杆机构的杆长有关，而且还与机架和原动件的选取有关。平面五杆机构若满足：Lmax Lmin1 Lmin2≤a b（其余两杆的长度和），且当一个短杆为输入连架杆，而另一个短杆为机架或另一输入连架杆时，则该五杆机构必存在双曲柄。     

基于同源机构构造的一类自运动机构综合及其比例尺度特征

以一类动静平台均为等边三角形的6-SS型自运动机构为研究对象,从同源机构构造的视角探究该类机构的综合以及尺度特征。根据末端构件存在的转动、移动特征,建立空间单环SSC机构的共形几何代数模型,分析其运动参数与尺寸参数之间的映射关系;基于该机构在最高位置处的垂直投影,构造了具有相同映射关系的一簇3-SS/C机构,揭示了等边三角形平台的6-SS型自运动机构的同源构成本质以及所需满足的位形条件。根据机构簇存在的尺寸转换关系,设计给定的3-SS/C机构的同源机构,分析并得出平台设计点满足的几何规律,提出了6-SS型自运动机构综合的几何化方法;进一步基于所得出的几何规律,揭示了该类机构的比例尺度特征,Griffis-Duffy平台为该类机构的特例。该项研究在丰富同源机构种类的同时,也为包含比例尺度特征的机器人机构拓扑结构设计提供了一个崭新视角。     

四杆曲线同源机构的构成特性和传动角的研究

四杆曲线同源机构与原始机构的对应杆长具有比例和对调关系，且同源机构要由反装构形得到，从而揭示出同源机构与原始机构在尺寸型上的内在联系；本文还提出：在大多数使用情况下，四杆曲线同源机构与原始机构具有相同的传动角     

基于虚拟样机技术的X型放大杆系的优化设计

提出了一种应用于吊臂式高压线检测机器人系统的行程放大机构——X型行程放大杆系。阐述了该机构的设计原理,并运用虚拟样机技术对关键参数进行优化设计。     

Refractive and relativistic effects on ITER low field side reflectometer design

The ITER low field side reflectometer faces some unique design challenges, among which are included the effect of relativistic electron temperatures and refraction of probing waves. This paper utilizes GENRAY, a 3D ray tracing code, to investigate these effects. Using a simulated ITER operating scenario, characteristics of the reflected millimeter waves after return to the launch plane are quantified as a function of a range of design parameters, including antenna height, antenna diameter, and antenna radial position. Results for edge/SOL measurement with both O- and X-mode polarizations using proposed antennas are reported.     

Direct detection of lower hybrid wave using a reflectometer on Alcator C-Mod

The possibility of directly detecting a density perturbation produced by lower hybrid (LH) waves using a reflectometer is presented. We investigate the microwave scattering of reflectometer probe beams by a model density fluctuation produced by short wavelength LH waves in an Alcator C-Mod experimental condition. In the O-mode case, the maximum response of phase measurement is found to occur when the density perturbation is approximately centimeters in front of the antenna, where Bragg scattering condition is satisfied. In the X-mode case, the phase measurement is predicted to be more sensitive to the density fluctuation close to the cut-off layer. A feasibility test was carried out using a 50 GHz O-mode reflectometer on the Alcator C-Mod tokamak, and positive results including the detection of 4.6 GHz pump wave and parametric decay instabilities were obtained.     

Optimization studies of the ITER low field side reflectometer

Microwave reflectometry will be used on ITER to measure the electron density profile, density fluctuations due to MHD/turbulence, edge localized mode (ELM) density transients, and as an L-H transition monitor. The ITER low field side reflectometer system will measure both core and edge quantities using multiple antenna arrays spanning frequency ranges of 15-155 GHz for the O-mode system and 55-220 GHz for the X-mode system. Optimization studies using the GENRAY ray-tracing code have been done for edge and core measurements. The reflectometer launchers will utilize the HE11 mode launched from circular corrugated waveguide. The launched beams are assumed to be Gaussian with a beam waist diameter of 0.643 times the waveguide diameter. Optimum launcher size and placement are investigated by computing the antenna coupling between launchers, assuming the launched and received beams have a Gaussian beam pattern.     

六杆机构的运动仿真及方法比较

简要介绍了Simulink与Simmechanics在六杆机构运动分析中的应用。以矢量法建立运动学矩阵方程,分别采用Simulink、Simmechanics进行运动仿真。这两种方法求解效率高,在机构性能分析中具有一定的应用价值。     

基于ADAMS的伸展滑撬上调整机构仿真分析与优化

调整机构是某些拍摄平台的重要组成部分。针对一型伸展的直升机滑撬,建立数学模型进行运动学分析,在ADAMS中建立虚拟样机模型,进行运动仿真,仿真出拍摄平台垂直方向上的偏角和运动副间杆件的长度变化曲线图,参数化模型并对偏角和长度曲线进行有效值法优化设计,确定优化后的各参数值。各参数值可为调整机构的尺寸修改提供帮助。     

升降横移式立体车库传动机构研究

讨论了升降横移式立体车库的特点和应用前景,根据车库传动机构的要求,设计了新的传动机(构升降机构、横移机构、卸载机构),并进行了创新性的研究。     

电脑刺绣机挑线机构的创新设计

以电脑刺绣机挑线机构为研究对象，设计出一种新型的电脑刺绣机挑线机构，推导了创新机构设计的理论方程，计算分析了创新机构的挑线运动规律，画出了创新机构的结构简图，所得结论可用于电脑刺绣机挑线机构的创新设计。     

Effects of a turbocharger cut out system on vibration characteristics of a propulsion shafting system and a large low speed marine diesel engine

To cope with the long term recession in the shipping industry due to oversupply of ships and high oil prices and due to reinforcement of environmental regulations to reduce greenhouse gas emission from ships, large container vessels built recently have ultra-long stroke engines with high propulsion efficiency. For these, de-rated engine and tuning technologies are used to reduce fuel oil consumption. However, previously built vessels were optimized for high ship speed. In these case, lowering ship speed to reduce ship operating cost does not provide similar benefits. Therefore, engine manufacturers have developed a turbocharger cut-out system to reduce fuel oil consumption at low speed. This has the advantage of reducing fuel consumption at low speeds, but also has the characteristic of producing higher torsional exciting force than is typical in existing engines for low load ranges. In this paper, the performance and dynamic characteristics of a marine diesel engine were reviewed after applying a turbocharger cut-out system. Then the effects on the engine body vibration and the torsional vibration were examined for a corresponding propulsion shafting system in a Panamax container-vessel equipped with a turbocharger cut-out system optimized for slow steaming. As a result, the torsional vibratory stress in shafts was increased. This had a larger effect on the X-mode shape of the engine body vibration and on the upper structure vibration, when one of three turbochargers was cut out.     

压出式瓶盖注射模设计

通过对压出式瓶盖的工艺分析,设计了一模四腔的注塑模.在模具中设计了圆锥螺纹脱模机构、弧形侧抽芯机构和其它结构的设计,以及介绍了模具工作过程.