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首页> 外文会议>EuSPEN(European Society for Precision Engineering and Nanotechnology) International Conference; 20040531-0602; Glasgow(GB) >Finite Element Analysis: precision of principles
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Finite Element Analysis: precision of principles

机译：有限元分析：原理精度

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摘要

Precision engineering is heavily based on its principles. Increasingly high accuracy in positioning and stability of mechanical systems is testing the limits of interaction between theory and reality. There is an area in between, however, using theory in a very fundamental way, but coming as close to reality as numerically possible: finite element analysis (FEA). At TNO TPD, instruments are developed with picometre stability and nanometre positioning accuracy for space, lithography and other applied sciences. In theory, all these instruments should work instantaneously. In practice, it's not that easy. Before actually manufacturing these high-precision instruments or test-items thereof, extensive analyses, hand-calculations and numerical calculations, are performed to accurately describe and predict their behaviour in operational circumstances, which are often extreme. Finite element analysis requires good understanding of the principles involved in precision engineering, fine mathematical applications and a thorough insight in 'real life'. All these qualities combined, make mechanical analyses at TNO TPD uniquely valuable in projects involving design and development of high precision instruments. FEA quantifies the principles of precision engineering. This article scans through TNO TPD's approach to analysing high precision instruments. One example is shown of instruments built up from draft sketches of fundamental elements in precision engineering to flight hardware for space applications. FEA plays an increasingly large role in the development of these instruments.
机译：精密工程很大程度上是基于其原理。机械系统的定位和稳定性方面越来越高的精度正在测试理论与现实之间相互作用的极限。但是，两者之间存在一个领域，即以非常基本的方式使用理论，但在数值上尽可能接近实际：有限元分析（FEA）。在TNO TPD，开发的仪器具有皮米级的稳定性和纳米级的定位精度，适用于太空，光刻和其他应用科学。从理论上讲，所有这些工具都应立即运行。实际上，这并不容易。在实际制造这些高精度仪器或其测试项目之前，需要进行广泛的分析，人工计算和数值计算，以准确地描述和预测其在极端情况下的运行情况。有限元分析要求对精密工程，精细的数学应用以及对“现实生活”的透彻了解需要深入了解。所有这些品质的结合，使得TNO TPD的机械分析在涉及高精度仪器设计和开发的项目中具有独特的价值。 FEA量化了精密工程的原理。本文浏览了TNO TPD分析高精度仪器的方法。展示了一个仪器的示例，该仪器是从精密工程中的基本要素草图到用于太空应用的飞行硬件而构建的。 FEA在这些工具的开发中扮演着越来越重要的角色。

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