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Active vibration control for a Free Piston Stirling Engine generator using a voice coil actuator

机译：使用音圈执行器的自由活塞斯特林发动机发电机的主动振动控制

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摘要

This work presents the study of active vibration control for a FPSE/ LA engine to ensure a reliable engine operation within a broader range of operation frequencies [50 ± 3 Hz] complying with new regulations. An ATMD is discussed as a potential solution for increasing the operational envelope from original frequency requirements of [50 ± 0.5 Hz] to the new range while maintaining vibration amplitudes below 20 µm. A suitable vibration model of the engine setup is discussed and experimentally validated. The active vibration control for the vibration model is achieved by integrating the model of a current controlled Voice coil Motor (VCM). Zero-placement with relative acceleration/position and optimal linear quadratic control with a state observer were studied and compared in the time and frequency domains. The analysis shows that the active control accomplishes damping of vibration even at higher frequencies that coincide with the resonance of the entire system. A set of specifications were obtained based on actuator parameters such as power consumption, actuator strokes and force. The effect of time delays on the stability with each control strategy was investigated based on the proposed vibration model. Delays were found to affect stability depending on both the control methodology and excitation frequency.
机译：这项工作提出了对FPSE / LA发动机主动振动控制的研究，以确保在符合新规定的更宽的工作频率[50±3 Hz]范围内可靠地运行发动机。 ATMD被认为是一种潜在的解决方案，可将工作范围从原来的[50±0.5 Hz]频率要求提高到新的范围，同时将振动幅度保持在20 µm以下。讨论并通过实验验证了发动机设置的合适振动模型。通过集成电流控制音圈电机（VCM）的模型来实现振动模型的主动振动控制。在时域和频域中研究并比较了具有相对加速度/位置的零位置以及具有状态观察器的最佳线性二次控制。分析表明，即使在与整个系统共振一致的更高频率下，主动控制也能实现振动阻尼。根据执行器参数（例如功耗，执行器行程和力）获得了一组规格。基于所提出的振动模型，研究了每种控制策略下时延对稳定性的影响。发现延迟会影响稳定性，具体取决于控制方法和激励频率。

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