We present an analytical reduced-order model (macromodel) for electrically actuated clamped circular plate. After establishing the equations governing plate, we discretize system by using a Galerkin approach. The distributed-parameter are then reduced to finite of ordinary-differential in time. solve these equilibrium states due general electric potential and determine natural frequencies axisymmetric modes stable deflected position. Finally, attempt validate data from experiments performed...

After recoil implantation of Coulomb-excited $^{57}\mathrm{Fe}$ into $\ensuremath{\alpha}\ensuremath{-}\mathrm{Z}\mathrm{r}$ at 24 K, 30% the implanted atoms end up on interstitial positions where they experience large electric field gradients. Between 40 and 100 K quadrupole splitting shrinks by a factor 2 accompanied sharp decrease line intensity. This effect is interpreted as localized diffusion Fe jumping in octahedral cage hcp Zr lattice.


 Prognostics and health management (PHM) technologies reduce time costs for maintenance of products or processes through efficient cost-effective diagnostic prognostic activities. These activities aim to provide actionable information enable intelligent decision-making improved performance, safety, reliability, maintainability. Thoughtful PHM techniques can have a dramatic impact on manufacturing operations, standards system development, data collection analysis techniques, management,...


 The National Institute of Standards and Technology (NIST) hosted the Roadmapping Workshop – Measurement Science for Prognostics Health Management Smart Manufacturing Systems (PHM4SMS) in Fall 2014 to discuss needs priorities stakeholders PHM4SMS technology area. workshop brought together over 70 members PHM community. attendees included representatives from small, medium, large manufacturers; developers integrators; academic researchers; government organizations; trade associations;...

For pt. III see ibid., vol.5, 2098-106 (1972). State selected rotationally inelastic collision processes have been studied in Na2(B1 pi u) using laser induced fluorescence. As an extension of earlier measurements, the authors investigated levels with very high rotational quantum numbers: (v,J)=(0.152),(5,124) and (14,118). Collision partners are all rare gases. Asymmetries sigma ( delta J=+1)/ J=-1) as large 4.6 found, evidence for efficient dissociative collisions is reported temperature...

A linear axis is a vital subsystem of machine tools, and when installed operating within manufacturing facility, tool needs to stay in good condition for parts production. All tools degrade during operations, yet knowledge that degradation elusive; accurate detection manual time-consuming process. Thus, manufacturers need automated efficient methods diagnose the their axes without disruptions Towards this end, sensor-based method was developed quickly estimate performance axes. The...

In industrial applications, the mechanical wear on ball screw components can lead to a loss of positioning accuracy that reduces operational reliability and reproducibility production systems. Existing monitoring solutions are impractical for real settings or unable provide quantifiable estimates magnitude degradation. To address this, proposed method strategically applies two-phase data collection with inertial sensors perform both health fault estimation. The first, online phase offers...

Manufacturing operations suffer from degradation as equipment and processes are continually used to generate products. The development integration of monitoring, diagnostic, prognostic (collectively known PHM) technologies can enhance maintenance control strategies within manufacturing improve asset availability, product quality, overall productivity. As these continue evolve, it is critical for PHM be assessed ensure the community aware true capabilities potential technologies. National...

Abstract The frequency response function (FRF) provides an input–output model that describes the system dynamics. Learning FRF of a mechanical can facilitate identification, adaptive control, and condition-based health monitoring. Traditionally, FRFs be measured by off-line experimental testing, such as impulse measurements via impact hammer testing. In this paper, we investigate learning from operational data with nonlinear regression approach. A learned basis is proposed for run-time...

We present an analytical reduced-order model (macromodel) for electrostatically actuated clamped circular plate. After establishing the equations governing plate, we discretize system by using a Galerkin approach. Accordingly, distributed-parameter are reduced to finite of ordinary-differential in time. solve equilibrium states due general electric potential and determine natural frequencies axisymmetric modes stable deflected position. Finally, validate data from experiments performed on...