目的 通过研究双极性梯形波的时间参数和电压幅值对液滴喷射的影响，确定合适的驱动波形，旨在避免卫星液滴出现的同时提高压电喷墨打印头液滴喷射的速度。方法 利用ANSYS Workbench平台仿真分析压电喷墨过程，对压电–弹性–流体双向流固耦合模型和两相流模型进行分布结构分析，根据液滴状态及喷射速度优化驱动波形。结果 最终确定双极性梯形波的时间参数为4、14、4、20、4 μs，电压幅值为15 V和35 V，加载该驱动波形，液滴喷射平均速度达3.1 m/s，且液滴状态较好，无卫星液滴出现。结论 驱动波形的时间参数和电压幅值对压电喷墨打印头喷射液滴的速度和卫星液滴的控制有一定的影响，通过对驱动波形进行优化可以提高压电喷墨打印头喷射液滴的质量。

The work aims to determine the appropriate driving waveform by studying the effect of time parameter and voltage amplitude of bipolar trapezoidal wave on droplet injection, aiming to avoid the appearance of satellite droplet and improve the velocity of droplet injection by piezoelectric inkjet printing head. The piezoelectric inkjet process was simulated and analyzed by ANSYS Workbench platform. The piezoelectric-elastic-fluid bidirectional fluid-structure coupling model and two-phase flow model were subject to distribution structure analysis. The driving waveform was optimized according to droplet state and injection velocity. The time parameters of the bipolar trapezoidal wave were determined as 4, 14, 4, 20 and 4 μs, and the voltage amplitude was 15 V and 35 V. When the driving waveform was loaded, the average droplet injection velocity was 3.1 m/s and the droplet state was good without satellite droplet. The time parameters and voltage amplitudes of the driving waveform have a certain effect on the velocity of droplet injection and the control of satellite droplets. The quality of droplet injection by the piezoelectric inkjet printing head can be improved through the optimization of driving waveform.