Piezoelectric inkjet technology has been widely adopted in various industrial applications due to its versatility and compatibility with a wide range of ink chemistries. The driving signal, pivotal in activating the piezoelectric element to expel droplets, significantly influences droplet formation dynamics. Parameters such as droplet size, velocity, breakup time, and the occurrence of satellite droplets are all influenced by the driving signal and ultimately affect the overall quality of the printing process. This paper introduces a model for drop-on-demand (DOD) droplet formation dynamics from a single nozzle employing a bipolar driving signal. The model establishes a quantitative correlation between the waveform of the driving signal and key parameters including average jetting velocity at the nozzle exit, droplet jetting frequency, and droplet volume. Furthermore, an experimental setup is developed for the calibration and validation of the proposed model. Results demonstrate a close alignment between the model predictions and experimental observations, affirming its efficacy in forecasting droplet formation behaviors based on driving signal parameters.

中文翻译：

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驱动信号参数对压电喷墨液滴形成动力学影响的建模


压电喷墨技术因其多功能性和与各种墨水化学成分的兼容性而被广泛用于各种工业应用。驱动信号在激活压电元件以排出液滴方面起着关键作用，对液滴形成动力学有显著影响。液滴大小、速度、破碎时间和卫星液滴的出现等参数都受驱动信号的影响，最终影响打印过程的整体质量。本文介绍了一种采用双极驱动信号的单个喷嘴的按需喷墨 （DOD） 液滴形成动力学模型。该模型在驱动信号波形与关键参数（包括喷嘴出口处的平均喷射速度、液滴喷射频率和液滴体积）之间建立了定量相关性。此外，还开发了一种实验装置，用于校准和验证所提出的模型。结果表明，模型预测与实验观察结果密切相关，证实了其在基于驾驶信号参数预测液滴形成行为方面的有效性。