The micro displacement servo system includes step - electromotor , step - electromotor driver , grating displacement sensor and gearing etc . the closed loop position servo system eliminates machining error , fitting error and backhaul error etc . the control will completely run in the platform of windows 微位移控制系统由步进电动机、步进电动机驱动器、光栅位移传感器、传动机构等组成，采用闭环位置伺服控制消除了传动机构的加工误差、装夹误差、回程误差等。
The chief principle is based on the front intersection measurement aided by two electric theodolite . the laser emitter casts light , spots on the antenna surface and gets the 3d coordinates of the sample data . then , the surface precision of the antenna can be obtained by corresponding data processing 雷达天线检测原理是由激光目标发生器投射光点，两台电子经纬仪前方交会测量，得到采样点的三维坐标值，再进行相应的数据处理，最终对天线面的变形情况和蒙皮表面加工误差作出评价。
Moreover , on the basis of analyzing the dynamic time - variant characteristics of manufacturing errors and measuring errors and the influence of the measurement to the dimensional iv distribution of the work - pieces , a dynamic model ? shedlike model for the first time is initiated of the manufacturing dimension distribution of the work - pieces 分析了机械加工系统的加工误差和测量误差分布的动态时变特性，建立了零件测量尺寸分布的数学模型；在分析了加工误差和测量误差动态时变特性及测量对零件尺寸分布影响的基础上，首次提出了零件加工尺寸分布的动态模型? ?棚状模型。
Abstract : a new technology is put forward for vibration drilling under changed parameters of three cutting regions for machining micro holes . a new method is probed with which optimal vibration parameters of the stages are determined by non - linear regression . present investigation shows that the new method for vibration drilling , in which vibration parameters are changed with the optimal parameters of the stages , is an effective way to decrease error of drilling micro holes 文摘:提出了三区段变参数振动钻削微孔的新工艺；探讨了用非线性回归求取各区段最佳振动参数的方法；验证了以三区段最佳振动参数做变参数时，用振动钻孔可以全面降低微孔加工误差的优良工艺效果。
In this paper , accuracy design is completed through two steps : first , we analyze the error of parallel machine tool , the joints " gap are considered by using monte carlo method , also in mis part , three kinds of error sensitivity are established to wholly reflect the error of moving platform 在并联机床的精度设计部分，本文在并联机床的几何误差模型基础上，利用蒙特卡洛方法综合分析了包括铰链间隙的各项误差源对加工误差的影响，并建立了三类误差敏感度以全面评估并联机床的精度特点。
The establishment of experimental platform and researches on controlled system will provide experimental grounds for the precise realization of any given motion by controlled five - bar mechanism . it also provides basis for adjustment of compensation movement , when further consideration in rod processing errors , elastic deformation and the intervals between kinematics pair 此实验台的建立及控制系统的研究为受控五杆机构精确实现给定运动和轨迹提了供实验依据,也为下一步考虑杆件加工误差、弹性变形以及运动副之间的间隙时补偿运动的调整提供依据。
In this paper , the drive theory of the large ratio friction transmission is studied ; a new type elliptical cam wave generator is designed ; the large ratio friction transmission prototype is designed and manufactured ; based on the ansys finite element method software , structure of the elliptical cam is analyzed ; precision index of the manufactured large ratio friction transmission prototype , such as transmission accuracy , least step , stability of the least step , load capacity is measured by the absolute rotary encoder . by analyzing the measurement data and research content , it is think that the new elliptical cam wave generator could overcome a good many problems brought by processing errors , facilitate size precision adjustments , input moment can be achieved in the form of a pure force couple importing ; through this study , " the large ratio friction transmission prototype " could apply in practical engineering basically 本文研究了大速比摩擦传动的传动理论;设计了新型椭圆凸轮波发生器,设计制作了大速比摩擦传动样机;用软件ansys对所设计的椭圆凸轮结构进行了有限元分析;用19位绝对式编码器测试了大速比摩擦传动机构的传动精度、最小步距、最小步距的稳定性以及带负载能力等各项精度指标;对测量数据和研究内容进行了归纳和整理,认为新型椭圆凸轮波发生器克服了加工误差带来的诸多问题,新型椭圆凸轮波发生器可以进行尺寸精度调整,能够达到输入力矩以纯力偶的形式输入;通过本项研究,基本可以使“大速比摩擦传动机构”在工程中得以应用。
Furthermore , according to the dynamic time - variant characteristics of manufacturing errors , a concept of dynamic manufacturing ability index is initiated for the first time . and on this basis , according to the principles of mathematical statistics and quality control , the relations between the dynamic - error distribution of some different manufacturing dimensions and corresponding manufacturing quality are individually analyzed , the relevant mathematical model is set up , and a critical value criterion for waste appearance is advanced 另外，根据加工误差动态时变的特性，首次提出了动态加工能力指数的概念，在此基础上，依据数理统计和质量控制的原理，分别研究了几种加工尺寸动态误差分布与制造质量的关系，建立了相应的数学模型，提出了废品开始出现的临界值判据。
Focusing on the spatial cam mechanism ( scm ) , the dissertation , starting with the practical processing and the characteristics of the structure and meshing , detailedly analyzes and experiments research the structure theory , processing error and , one - side process and profile inspection of scm with spatial meshing principle and rotating transformation matrix operator methods 本文以空间凸轮机构为研究对象，从工程实际出发，以空间啮合原理和旋转变换矩阵为工具，从结构特点、啮合特性入手，对空间凸轮机构的结构设计、加工误差、单侧面加工工艺及廓面检测技术进行了深入地理论分析和实验研究。
This dissertation integrates theory analysis with experiment research and makes further research on nc geometric simulation . the establish of the cutting forces model , cutter wear model , machining error predition and compensation , machining parameter optimization in the physical simulation fields are made more research on the basis of the above research contents . the main achievements are as follows : 1 本文采用理论分析与实验研究相结合的思路,进一步研究了几何仿真与精度验证技术,研究了铣削力模型的建立、刀具磨损模型的建立、加工误差模型与误差补偿技术、基于加工仿真的加工参数优化等物理仿真关键技术,主要研究内容和成果如下: 1 .设计了集几何仿真和物理仿真为一体的数控加工仿真系统的体系结构。
