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A TEST SETUP FOR EVALUATION OF HARMONIC DISTORTIONS IN PRECISION INERTIAL SENSORS

机译:精密惯性传感器中谐波畸变的测试装置

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Steadily improving performance of inertial sensors necessitates significant enhancement of the methods and equipment used for their evaluation. As the nonlinearity of sensors decreases and gets close to that of the exciters, new challenges arise. One of them, addressed in this research, is a superposition of errors caused by the nonlinearity of tested devices with nonlinear distortions of excitation employed for experimental evaluation. This can lead to a cancellation, at least partial, of the effects of both imperfections and underestimation of the actual distortions of the evaluated sensors.We implement and analyze several system architectures and components of applicable motion generation systems from the viewpoint of satisfying the relevant, often conflicting requirements posed by the evaluation of high performance sensors. Robust mechanical integration of the guidance, actuation and measurement functions emerges as a key factor for achieving the needed quality of generated test patterns. We find precision air bearing stages such as ABL1500 series (Aerotech) most suitable for implementing the needed experimental setup. We propose an architecture with two reciprocating stages, implement and evaluate its core components, and illustrate its performance with experimental results.
机译:为了不断提高惯性传感器的性能,必须大大提高用于其评估的方法和设备。随着传感器的非线性减小并接近于激励器的非线性,出现了新的挑战。其中一项是在本研究中解决的,它是由被测设备的非线性和用于实验评估的激励的非线性畸变引起的误差的叠加。这可以导致至少部分消除缺陷的影响以及对所评估传感器的实际失真的低估。 我们从满足高性能传感器评估所提出的相关的,经常相互冲突的要求的角度出发,实现并分析了适用的运动生成系统的几种系统架构和组件。指导,执行和测量功能的强大机械集成成为实现所生成测试图案所需质量的关键因素。我们发现诸如ABL1500系列(Aerotech)之类的精密空气轴承台最适合实施所需的实验装置。我们提出一种具有两个往复阶段的体系结构,实施和评估其核心组件,并通过实验结果说明其性能。

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