Pneumatic vibration isolators play an increasingly important role in precision manufacturing. In this paper, a H∞ active control strategy for pneumatic vibration isolation system based on voltage input saturation is proposed and studied. The objective is to suppress the resonance peaks and low-frequency vibration disturbances near the intrinsic frequency of the vibration isolation system. The control algorithm is highly robust to system model errors, and frequency characteristic shaping design is performed by selecting appropriate weighting functions according to the performance objectives to achieve maximum vibration suppression in the frequency band where active control is required. Considering the smoothness of the operation of the pneumatic vibration isolation system and the safety of the control channel, input saturation control of the input voltage is carried out. Finally, a 1–10 Hz excitation signal is applied to test the performance of the pneumatic vibration isolation system under this active control method, and the experimental results show the effectiveness of the algorithm.

中文翻译：

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基于频率整形的 H∞ 控制，用于输入电压饱和的主动气动隔振


气动隔振器在精密制造中发挥着越来越重要的作用。本文提出并研究了一种基于电压输入饱和的气动隔振系统H∞主动控制策略。目的是抑制隔振系统固有频率附近的共振峰值和低频振动扰动。控制算法对系统模型误差具有很强的鲁棒性，并根据性能目标选择合适的权重函数进行频率特性整形设计，在需要主动控制的频段实现最大程度的振动抑制。考虑到气动隔振系统运行的平稳性和控制通道的安全性，对输入电压进行输入饱和控制。最后，应用1–10 Hz激励信号测试该主动控制方法下气动隔振系统的性能，实验结果表明了该算法的有效性。