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首页> 外文期刊>Journal of Manufacturing Processes >Multivariable control of ball-milled reactive material composition and structure
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Multivariable control of ball-milled reactive material composition and structure

机译：球磨反应材料成分和结构的多变量控制

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摘要

In reactive bimetallic compounds such as Ni-Al multilayers, desirable thermo-kinetic properties upon ignition require simultaneously controlled geometric microstructure and material composition. This article establishes fundamental dynamical models of plastic deformation and material diffusion in ball milling processing of particulates from Ni and Al powders, for the purpose of designing and implementing feedback control strategies for process control. The role of heat dissipation from plastic yield and friction slip in affecting compressibility and diffusivity of the material is elucidated. The different sensitivity of compressibility and diffusivity to thermal power is exploited by introducing multivariable control of both bilayer thickness and penetration depth simultaneously, using a real-time computational model as an observer with adaptation informed by infrared measurements of external vial temperature. The proposed control scheme is tested on a laboratory low-energy ball milling system and demonstrated to effectively modulate power intensity and process duration to obtain the desired microstructure and material composition.
机译：在诸如Ni-Al多层之类的反应性双金属化合物中，点燃时理想的热动力学性质需要同时控制几何微观结构和材料组成。本文建立了镍和铝粉颗粒球磨工艺中塑性变形和材料扩散的基本动力学模型，目的是设计和实施过程控制的反馈控制策略。阐明了塑性屈服和摩擦滑动产生的散热在影响材料的可压缩性和扩散性方面的作用。通过同时引入双层厚度和穿透深度的多变量控制，利用实时计算模型作为观测器，并通过外部小瓶温度的红外测量获知适应性，来利用可压缩性和扩散性对热能的不同敏感性。拟议的控制方案在实验室低能球磨系统上进行了测试，并证明可有效调节功率强度和过程持续时间，以获得所需的微观结构和材料成分。

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  • 来源
    《Journal of Manufacturing Processes》 |2020年第5期|238-249|共12页
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  • 作者单位

    Univ Nevada Mech Engn Dept 1664 N Virginia St Reno NV 89557 USA;

    Aristotelian Univ Thessaloniki Dept Elect & Comp Engn Thessaloniki Greece;

    Khalifa Univ Dept Mech Engn Abu Dhabi U Arab Emirates;

    Univ Leoben Dept Mat Sci Leoben Austria;

    Univ Cyprus Dept Mech & Mfg Engn Nicosia Cyprus;

    Nazarbayev Univ Off Provost Astana Kazakhstan|Vin Univ Coll Engn & Comp Sci Hanoi Vietnam;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ball milling; Reactive multilayers; Plastic deformation; Diffusion penetration; Multivariable control;

    机译：球磨;反应性多层;塑性变形;扩散渗透;多变量控制;

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