Smart Inductive Arrays to Efficiently Calm Structural Vibrations

不断增加的能源成本和日益严格的法律的规定要求提高各种机械的效率。因此，越来越多的结构是建立在减轻影响的轻量化方面，这阻尼振荡。这种趋势的效果是对振动激发的灵敏度增加。因此，在不影响系统功能或效率的情况下，有效地、紧密地集中和自适应地减少机械结构中的振荡是至关重要的。特别具有挑战性的是空间延伸结构-例如面板，车身部件或飞机机翼。这样的结构表现出许多谐振频率，易于过度辐射噪声，并且不能通过局部措施有效地平静。从这个角度来看，分布式阻尼装置似乎是一个自然的选择。然而，通常应用的绝缘板的效果不大，不允许有差异化的设计的阻尼mechanism.Motivated由这一观察，这是本建议的主要目标，开发分布式感应阻尼元件（“智能阵列”）结合智能和自适应能力。电磁概念在这方面提供了一个有前途的基础，可以很容易地应用到扩展结构。与常用的强局部化措施相比，这种方法具有各种优点：除了避免耗散功率的强局部化外，它们还可用于阻尼个别振动模式，或影响所需位置处的结构。 此外，组合和互连不同的元素和定制的物理非线性，情况自适应配置可以创建。作为进一步的一点，它是可以预期的，基于感应的模块从分布式配置中获益：由于较低的局部耗散功率需要较低的通量密度，更少的材料是必要的，设备的总重量可以减少。所提出的方法已经被优先计划PP 1897“平静，平稳和智能”的几个项目所激励，并无缝地适应第二个资助期。除了优先计划之外，这种“智能阵列”还可以受益于许多相关领域，如产品开发、材料科学、增材制造、MEMS和能量收集。

Continuously increasing energy costs and tightening legal regulations require to increase the efficiency of all kinds of machinery. Consequently, structures are more and more built under lightweight aspects reducing influences, which damp oscillations. The effect of this trend is an increased sensitivity against vibrational excitation. Therefore, it is vital to reduce oscillations in mechanical structures effectively, tightly focused and situation adaptive without affecting the functionality or the efficiency of the system. Particularly challenging are spatially extended structures – as for example panels, vehicle body parts, or wings of airplanes. Such structures exhibit a lot of resonance frequencies, are prone to excessively radiate noise and cannot be calmed efficiently by localized measures. From this point of view, distributed damping devices appear to be a natural choice. However, commonly applied insulation panels turn out to be of little effect and do not allow for a differentiated design of the damping mechanisms.Motivated by this observation, it is the main goal of this proposal to develop distributed inductive damping elements (“smart arrays”) incorporating intelligent and adaptive capabilities. Electromagnetic concepts provide a promising basis in this context and can be easily applied to extended structures. Compared to commonly applied, strongly localized measures, such approaches offer various advantages: besides avoiding strong localization of dissipation power, they can be used to damp individual vibration modes, or affect the considered structure at a desired location. Furthermore, combining and interconnecting different elements and tailoring physical non-linearities, situation adaptive configurations can be created. As a further point it is to be expected, that induction-based modules profit from distributed configurations: as lower local dissipation power requires lower flux densities, less material is necessary, and the overall weight of the device can be reduced.The proposed approach has been motivated by several projects of the priority program PP 1897 “calm, smooth and smart” and fits seamlessly into the second funding period. Beyond the priority program, such “smart arrays” may benefit from and contribute to a lot of related fields, such as product development, material sciences, additive manufacturing, MEMS and energy harvesting.