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首页> 外文学位 >Polymer adhesion test system: A mechatronic instrument to study the cohesion and adhesion properties of polymers in high-speed squeezing flow.
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Polymer adhesion test system: A mechatronic instrument to study the cohesion and adhesion properties of polymers in high-speed squeezing flow.

机译：聚合物附着力测试系统：一种机电一体化的仪器，用于研究高速挤压流中聚合物的内聚力和附着力特性。

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This thesis involves the design, fabrication and use of an instrument to characterize polymeric materials at high speed. The work comprises a study in the field of mechatronics. Mechatronics is the synergistic combination of precision mechanical engineering, electronics, control systems and computers. Each of these components was required for a different aspect of the instrument; it was only through their synergy that the goal of high-speed operation was achieved. Indicative of a mechatronics approach, the mechanical design included a direct drive actuator, a hardy, simple means of obtaining precision motion. Inertia had to be minimized. The structural integrity of the design had to be analyzed and verified. Wideband, low noise, electronics were used in the feedback control loop and for the sensors that measured various mechanical variables. A linear feedback control system gave the instrument, the reference signal tracking, disturbance rejection and robustness to unmodeled dynamics required for its operation. This control system, therefore, provided the system functionality for the mechanical components. Finally, a computer system was used for data acquisition, parameter model determination and reference signal generation. The whole instrument was clearly more than the sum of its component parts.; The primary scientific advance from this work comes from the fact that this instrument enables a high-speed characterization of polymers with a precision not previously available. The instrument subjects the polymer to squeezing flow, a type of flow pattern more complex than shearing flow and characteristic of many engineering processes. The instrument measures the viscoelastic rheological properties of the polymer under this flow regime at high system speeds (high rates of strain). Further, the instrument characterizes the cohesive properties of the polymer under high-speed transient extension. Finally, the instrument measures the adhesive properties of the polymer in compressive contact with various substrates on very short time scales.
机译：本论文涉及仪器的设计，制造和使用，以高速表征聚合物材料。这项工作包括机电一体化领域的研究。机电一体化是精密机械工程，电子，控制系统和计算机的协同结合。仪器的不同方面都需要这些组件中的每一个。只有通过他们的协同作用，才能实现高速运行的目标。机械设计表明采用了机电一体化方法，其中包括直接驱动致动器，一种获得精确运动的坚固，简单的方法。惯性必须最小化。设计的结构完整性必须进行分析和验证。宽带，低噪声电子设备被用于反馈控制回路以及用于测量各种机械变量的传感器。线性反馈控制系统为仪器提供了参考信号跟踪，干扰抑制和鲁棒性，使其具有运行所需的非建模动力学。因此，该控制系统为机械组件提供了系统功能。最后，使用计算机系统进行数据采集，参数模型确定和参考信号生成。整个文书显然不仅仅是其组成部分的总和。这项工作的主要科学进展来自这样一个事实，即该仪器能够以前所未有的精度对聚合物进行高速表征。该仪器对聚合物进行挤压流动，这是一种比剪切流动更复杂的流动模式，并且具有许多工程过程的特征。该仪器在高系统速度（高应变速率）下，在此流动状态下测量聚合物的粘弹性流变特性。此外，该仪器表征了在高速瞬态扩展下聚合物的内聚性能。最后，该仪器在非常短的时间内测量与各种基材压缩接触时聚合物的粘合性能。

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