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An optimal two-input approach for impulse measurements in the nanoN · s range produced by contact forces

机译：接触力产生的纳秒级脉冲测量的最佳双输入方法

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摘要

The performances of an optimal two-input filter technique for measuring impulses, caused by contact forces, in the nanoN • s range have been investigated. The instrument is based on a sensing element (proof mass) suspended by a simple pendulum. The impulse is exerted to the proof mass and is measured by applying the optimal filter to the measured signal of the resulting swing motion of the pendulum. Since the contact forces cause the mass to rest out of the pendulum equilibrium before the application of an unknown impulse, the resulting swing motion is also affected by such an undesired and unknown input. As a consequence, the pendulum initial position must be included as an additional input of the optimal filter. Main objectives of this article are to: (a) present the mathematical formulation of the two-input optimal filter, (b) apply this formulation to a harmonic oscillator initially set out of the equilibrium position and subjected to an impulse, (c) analyze the performances of the filtering technique in terms of an achievable measurement accuracy taking into account the effect of noise, sampling frequency, width of the sampling window and an unknown instant of an impulse application.
机译：已经研究了用于测量由接触力引起的脉冲的最佳二输入滤波器技术的性能，其范围为nanoN•s。该仪器基于一个简单的摆锤悬挂的传感元件（标准质量）。脉冲施加到检测质量，并通过将最佳滤波器应用于摆锤产生的摆动运动的测量信号进行测量。由于接触力使质量在施加未知脉冲之前停留在摆平衡之外，因此，产生的摆动运动也会受到这种不希望的和未知的输入的影响。因此，必须将摆的初始位置作为最佳滤波器的附加输入。本文的主要目的是：（a）给出双输入最优滤波器的数学公式，（b）将该公式应用于最初从平衡位置开始并受到脉冲的谐波振荡器，（c）分析考虑到噪声，采样频率，采样窗口的宽度和脉冲应用的未知瞬间的影响，可实现的测量精度方面的滤波技术性能。

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  • 来源
    《Mechanical systems and signal processing》 |2011年第5期|p.1646-1660|共15页
  • 作者

    M. Benedetti; D. Bortoluzzi; L Baglivo; S. Vitale;

  • 作者单位

    Department of Materials Engineering and Industrial Technologies, University of Trento, Via Mesiano 77, 38123 Trento, Italy,Italian Institute of Nuclear Physics (INFN), Sezione di Padova, Cruppo Collegato di Trento, Trento, Italy;

    Department of Mechanical and Structural Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy,Italian Institute of Nuclear Physics (INFN), Sezione di Padova, Cruppo Collegato di Trento, Trento, Italy;

    Department of Mechanical and Structural Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy,Italian Institute of Nuclear Physics (INFN), Sezione di Padova, Cruppo Collegato di Trento, Trento, Italy;

    Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo (TN), Italy,Italian Institute of Nuclear Physics (INFN), Sezione di Padova, Cruppo Collegato di Trento, Trento, Italy;

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  • 正文语种 eng
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  • 关键词

    impulse measurement; optimal filter; contact forces;

    机译：脉冲测量最佳过滤器;接触力;

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