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首页> 外文期刊>Journal of vibration and control: JVC >Semi-active damping and energy harvesting using an electromagnetic transducer
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Semi-active damping and energy harvesting using an electromagnetic transducer

机译：使用电磁换能器半主动阻尼和能量收集

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摘要

This article studies a semi-active control strategy applied to a vibration damping and to an energy harvesting problem. In particular, a single-degree-of freedom oscillating device is considered, comprising a mass connected to the ground by means of a spring, a dashpot and an electromagnetic transducer. The latter component yields a damping contribution which can be easily modulated between a minimum and a maximum value. By applying the Pontryagin maximum principle to the vibration damping problem, it is shown that the time optimal control law consists of a switching of the electromechanical damping contribution between the maximum and the minimum values. The same Principle is then applied to the optimization of the energy harvestable by the same structure under periodic excitation. Differently from the case of vibration damping, the solution of the latter problem can contain both regular phases (during which the optimal choice of the modulated damping is either at its maximum or at its minimum value) and singular phases (during which the optimal damping has smooth variations). Interestingly, it is also shown that when the objective is to dissipate rather than to harvest energy from the device, optimal strategies only consist of regular phases. Both the proposed semi-active strategies are shown to outperform corresponding optimized passive classic solutions, used as a benchmark for comparison.
机译：本文研究了应用于振动阻尼和能量收集问题的半主动控制策略。特别地，考虑了单一程度的自由度振荡装置，包括通过弹簧，小鲨点和电磁换能器连接到地的质量。后一组分产生阻尼贡献，该阻尼贡献可以在最小值和最大值之间容易地调制。通过将Pontryagin最大原理应用于振动阻尼问题，表明时间最佳控制法由最大值和最小值之间的机电阻尼贡献的切换。然后将相同的原理应用于在周期性激发下通过相同结构收获的能量的优化。与振动阻尼的情况不同，后者问题的解决方案可以包含常规阶段（在此期间调制阻尼的最佳选择是在其最大值或最小值的最大值或最小值处）（在此期间最佳阻尼平滑的变化）。有趣的是，还表明，当目标是消散而不是从设备收获能量时，最佳策略仅由常规阶段组成。所提出的半主动策略都显示出优于相应的优化无源经典解决方案，用作比较的基准。

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