针对一种三自由度的并联机构采用Lagrange方程建立了动力学方程，得出了机构驱动力显式解。用计算机程序模拟了动平台做圆周运动时驱动力的变化情况以及机构简化所产生驱动力误差的大小，给出了可以对机构进行简化的条件。分析了机构的结构参数与驱动力的关系，为这种机构动力学特性的深入分析和结构优化设计提供了参考。

从表面完整性角度研究了五种制孔工艺对7075铝合金板材紧固孔表面加工质量的影响，通过对不同种工艺所产生的紧固孔表面粗糙度、残余应力和显微硬度进行检测和比较，发现钻扩铰多步慢进给工艺和钻扩铰一步复合制孔工艺所达到的表面完整性指标优于其它加工工艺。另外分析了影响孔加工质量的因素，证明了一步复合制孔工艺是一种先进、快捷的高质量制孔方法。

从表面完整性角度研究了五种制孔工艺对7075铝合金板材紧固孔表面加工质量的影响，通过对不同种工艺所产生的紧固孔表面粗糙度、残余应力和显微硬度进行检测和比较，发现钻扩铰多步慢进给工艺和钻扩铰一步复合制孔工艺所达到的表面完整性指标优于其它加工工艺。另外分析了影响孔加工质量的因素，证明了一步复合制孔工艺是一种先进、快捷的高质量制孔方法。

Correlative error is a kind of error between the cutter locations. This text presents a detailed analysis about correlative error in the principal axis method (PAM) that is a strategy of tool positioning for five-axis machining. It points out all the strategies based on linear projection can not avoid this interference and cannot be disregarded especially in the strategies with large stepover. Accurate calculating is made individually on linear and curve feed and formulae are developed. The author also gave the available application range of PAM and the algorithm for estimating correlative error.

CAD/CAM systems provide the possibility to integrate with NC post-processors, so the NC program can directly execute post-processing in a CAM system. But surveys taken by CAM users indicated that producing a formatted NC program remained to be one of their most perplexing problems. In this paper, based on the general introduction of the NC post-processing, the authors discussed the important roles of post-processing in NC modules, and analyzed some problems in popular post-processors integrated with CAM system. This paper also recommended some famous post-processing products and their features. At last some suggestions and a sample post-processing of parallel machine were given to solve the problems.