Error Analysis for the In-Situ Fabrication of Mechanisms
Error Analysis for the In-Situ Fabrication of Mechanisms
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DOI：
10.1115/1.1631577
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发表时间：
2003-12
影响因子：
3.3
通讯作者：
S. Rajagopalan;M. Cutkosky
中科院分区：
文献类型：
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作者：
S. Rajagopalan;M. Cutkosky
制造技术，如实体自由成型制造（SFF）或分层制造，能够制造完全预组装的机构（即制造后不需要明确组件组装的机构）。我们把这种组装方式称为现场制造。在这一领域出现的一个有趣的问题是，作为制造可变性的结果，这种机制的性能中的误差的估计。传统的机构误差分析中的参数独立性和叠加性假设不适用于这种制造方法。在本文中，我们制定了一个通用的技术，用于调查原位制造的机构的运动性能。提出的技术承认确定性和随机误差估计的平面和空间连杆机构的理想关节。该方法与平面的例子说明。由于关节间隙，形状误差，或其他影响，如链接的灵活性和驱动程序错误，不考虑在分析中，但正在进行的研究的一部分。
Fabrication techniques like Solid Freeform Fabrication (SFF), or Layered Manufacturing, enable the manufacture of completely pre-assembled mechanisms (i.e. those that require no explicit component assembly after fabrication). We refer to this manner of building assemblies as in-situ fabrication. An interesting issue that arises in this domain is the estimation of errors in the performance of such mechanisms as a consequence of manufacturing variability. Assumptions of parametric independence and stack-up made in conventional error analysis for mechanisms do not hold for this method of fabrication. In this paper we formulate a general technique for investigating the kinematic performance of mechanisms fabricated in-situ. The technique presented admits deterministic and stochastic error estimation of planar and spatial linkages with ideal joints. The method is illustrated with a planar example. Errors due to joint clearances, form errors, or other effects like link flexibility and driver-error, are not considered in the analysis-but are part of ongoing research.