Development and testing of a discrete coil magnetostrictive actuator

Smart Materials and Structures Pub Date : 2024-07-15 DOI:10.1088/1361-665x/ad6382

Yanwen Wang, Yuchuan Zhu, Long Chen, J. Ling, Mingming Zhang

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Abstract

Active combustion control (ACC) technology is an effective measure for suppressing the combustion oscillation of aero-engines. The magnetostrictive actuator is the most suitable choice for the ACC actuator due to its excellent high-frequency characteristics and high-temperature resistance. For the magnetostrictive actuator to produce high-frequency displacement, the constant current driver must have sufficient power, which increased its mass. A solution is to use multi-channel and low-power constant current driver. Therefore, the coil of the magnetostrictive actuator is axially dispersed and driven by two four-channel servo amplifiers. The driver's mass is significantly reduced while maintaining the same electromagnetic conversion effect. In addition, an analytical model of a discrete coil magnetostrictive actuator is established, and a series of experiments are conducted. The maximum hysteresis error of output displacement at 200 Hz is reduced by 15.2%. Furthermore, under PID closed-loop control, the root mean square (RMS) error is less than 2% when tracking a 10 Hz sinusoidal displacement with coil switching drive.

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离散线圈磁致伸缩致动器的开发与测试

主动燃烧控制（ACC）技术是抑制航空发动机燃烧振荡的有效措施。磁致伸缩致动器具有出色的高频特性和耐高温性能，是 ACC 致动器的最佳选择。要使磁致伸缩致动器产生高频位移，恒流驱动器必须具有足够的功率，这就增加了其质量。解决的办法是使用多通道、低功率的恒流驱动器。因此，磁致伸缩致动器的线圈被轴向分散，并由两个四通道伺服放大器驱动。在保持电磁转换效果不变的情况下，驱动器的质量大大减轻。此外，还建立了离散线圈磁致伸缩致动器的分析模型，并进行了一系列实验。200 Hz 输出位移的最大滞后误差降低了 15.2%。此外，在 PID 闭环控制下，利用线圈开关驱动跟踪 10 Hz 正弦位移时，均方根误差小于 2%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Smart Materials and Structures

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