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Process Emulation System for High-Power Piezoelectric Ultrasonic Actuators : Energy Harvesting and Systems

机译：大功率压电超声波致动器的过程仿真系统：能量收集和系统

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摘要

Ultrasonic actuators are used for a wide field of applications. The vibration energy can be used to realize many processes like ultrasonic welding or bonding. Furthermore there are many processes which run more efficient and faster combined with ultrasonic vibration like ultrasonic-assisted turning or drilling. Piezoelectric transducers are the main part of those applications. Most of the applications have a time-variant load behavior and need an amplitude feedback control to guarantee a stable process. To ensure correct function tests of the feedback control systems have to be done. In this case the processes have to be executed in association with a high number of cycles. To emulate the behavior of the environment the automotive and aerospace industries use hardware in the loop systems since a long time but there is no such a method for ultrasonic systems. This paper presents a method to realize high dynamic load emulation for different ultrasonic applications. Using a piezoelectric transformer it is possible to reproduce load curves by active damping on the secondary side of the transformer using a current proportional digital feedback circuit. A theoretical and experimental study of hardware in the loop system for ultrasonic applications is given by this paper. The present system allows testing a wide field of feedback control algorithms with high flexibility and a high number of cycles by utilization of low-cost components. This proceeding decreases design periods in association with feedback control.
机译：超声波执行器被广泛应用。振动能量可用于实现许多过程，例如超声波焊接或粘接。此外，与超声波振动（如超声辅助车削或钻孔）相结合，还有许多运行效率更高且速度更快的过程。压电换能器是这些应用的主要部分。大多数应用具有随时间变化的负载特性，并且需要幅度反馈控制以确保过程稳定。为了确保正确执行反馈控制系统的功能测试。在这种情况下，必须与大量循环相关联地执行处理。为了模拟环境的行为，汽车和航空航天业很长一段时间以来一直在环路系统中使用硬件，但是对于超声系统却没有这种方法。本文提出了一种针对不同超声应用实现高动态负载仿真的方法。使用压电变压器，可以通过使用电流比例数字反馈电路在变压器次级侧进行主动阻尼来再现负载曲线。本文给出了超声应用回路系统硬件的理论和实验研究。本系统允许通过利用低成本组件来测试具有高灵活性和大量周期的反馈控制算法的广泛领域。该过程减少了与反馈控制相关的设计周期。

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