Research on the sensitivity of magnetic levitation (MagLev) devices

Xie, Jun; Zhao, Peng; Jing, Zhongboyu; Zhang, Chengqian; Xia, Neng; Fu, Jianzhong

doi:10.1016/j.jmmm.2018.07.082

Cited by 34 publications

(24 citation statements)

References 17 publications

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“…Local mechanical properties are also a vital factor in the application of micro parts, such as micro gears . Current testing methods include ultrasonic technology, dielectric sensing, magnetic levitation, and nanoindentation . For example, Zhao et al .…”

Section: Introductionmentioning

confidence: 99%

Effect of injection speed on the mechanical properties of isotactic polypropylene micro injection molded parts based on a nanoindentation test

Wang

Zhang

Jiang

et al. 2018

J of Applied Polymer Sci

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Isotactic polypropylene micro parts were molded at different injection speeds by microinjection molding. The morphology and micro structure were characterized by a polarizing microscope, and the mechanical properties of differently structured layers were characterized by nanoindentation experiments. The influence of injection speed on the nanoindentation mechanical properties of each structural layer of the micro parts was analyzed. The results showed that the mechanical properties of different layers were different, the modulus and hardness of the position near the core layer were largest, and the modulus and hardness of the position near the skin were smallest. It is compelling that the modulus and hardness of each layer decreased first and then increased as the injection speed increased under a higher melt temperature (240 °C). Meanwhile, the opposite trend was observed at a lower melt temperature (220 °C). This phenomenon can be attributed to the competitive mechanism of the shear heat effect and the disorientation effect. In addition, injection speed had a greater influence on the nanoindentation mechanical properties in the perpendicular direction than in the flow direction. This work systematically explored the relationship between the microstructure and the local mechanical properties, which can provide new insights for microinjection molding design in the future. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47329.

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Section: Introductionmentioning

confidence: 99%

Effect of injection speed on the mechanical properties of isotactic polypropylene micro injection molded parts based on a nanoindentation test

Wang

Zhang

Jiang

et al. 2018

J of Applied Polymer Sci

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“…According to the levitation height, the density of the sample can be calculated. e accuracy of the device is estimated as 0.0002 g/cm 3 have done many works and achievements on this particular field [81,82,[85][86][87]. By flattening the device (cf.…”

Section: Magnetic Levitation Quality Detection Of Final Parts Is An mentioning

confidence: 99%

“…Recently, our research group further analyzed the correlation between the position of the defects and the levitation posture of the sample [94,95]. is method is further applied in the evaluation of washers [82] and injection molded lens [96] and subtle differences could be detected (cf. Figure 9(c)).…”

Section: Magnetic Levitation Quality Detection Of Final Parts Is An mentioning

confidence: 99%

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Intelligent Injection Molding on Sensing, Optimization, and Control

Zhao

Zhang

Dong

et al. 2020

Advances in Polymer Technology

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Injection molding is one of the most significant material processing methods for mass production of plastic products. It is widely used in various industry sectors, and its products are ubiquitous in our daily life. The settings and optimization of the injection molding process dictate the geometric precision and mechanical properties of the final products. Therefore, sensing, optimization, and control of the injection molding process have a crucial influence on product quality and have become an active research field with abundant literature. This paper defines the concept of intelligent injection molding as the integral application of these three procedures—sensing, optimization, and control. This paper reviews recent studies on methods for the detection of relevant physical variables, optimization of process parameters, and control strategies of machine variables in the molding process. Finally, conclusions are drawn to discuss future research directions and technologies, as well as algorithms worthy of being explored and developed.

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“…High temperature superconductors (HTS) are one of eligible contender which have been exploited in various applications such as energy storage [6]- [8], proficient power transmission (transformers or cables) [9]- [11], ship propulsion using motors [12]- [15], power generation (Generators) [16]- [18], and magnetic levitating trains [19] [20]. To maintain superconductivity, there is a need to dissipate the heat load generated due to AC losses imposed on the superconducting tape [21]- [23].…”

Section: Figure 1 Schematic Of Starc Abl Hybrid Electric Aircraftmentioning

confidence: 99%

Feasibility Analysis on Cryogenic Properties of Supercritical Nitrogen to be used in the Cooling of Hg-Based High Temperature Superconductors for Electric Aircraft Propulsion

Kumar¹,

Jeyan²

2019

IJEAT

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Electrified Aircraft Propulsion (EAP) and Advanced Hybrid Electric Aircrafts (AHEA) like NASA NX-3, SUGAR, NASA X-57 and STARC ABL are going to be the future of avionics as they have potential to improve fuel economy, emissions and noise levels. The agencies have suggested using superconducting cables for the electric transmission to reduce heat losses. The limit of critical current has reached 134 K where Hg- based ceramic materials are available that can superconduct at this temperature range. In order to retain the superconductivity, the cables have to be cooled below its critical temperature. Liquid nitrogen (LN2) boils of at 77 K which further leads to multiphase heat transfer challenges. An attempt has been made in the present work to overcome such challenges and a novel concept of using Supercritical Nitrogen (SCN), having critical temperature 126.19K and pressure as 3.3958MPa (consist single phase), as a cryogen for the cooling of Hg-Based Superconductors, has been introduced. Drastic variations have been found for thermophysical properties of SCN near the critical point. It has been concluded that few temperature and pressure ranges are suitable if one wants to incorporate SCN as cryogen for Hg-based superconductors.

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Research on the sensitivity of magnetic levitation (MagLev) devices

Cited by 34 publications

References 17 publications

Effect of injection speed on the mechanical properties of isotactic polypropylene micro injection molded parts based on a nanoindentation test

Effect of injection speed on the mechanical properties of isotactic polypropylene micro injection molded parts based on a nanoindentation test

Intelligent Injection Molding on Sensing, Optimization, and Control

Feasibility Analysis on Cryogenic Properties of Supercritical Nitrogen to be used in the Cooling of Hg-Based High Temperature Superconductors for Electric Aircraft Propulsion

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