Atalante – Active piezoelectric bearing with rotating actuators

Atalante â 带旋转执行器的主动压电轴承

• 批准号: 516722405
• 负责人: Professor Dr.-Ing. Stephan Rinderknecht
• 金额: --
• 依托单位: Institut für Mechatronische Systeme im Maschinenbau
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/516722405?language=en
• 关键词: Atalante; Active; piezoelectric; bearing; rotating

Rotating machines form the backbone of the technical world. They can be found in almost all areas such as pumps, jet engines and electric motors. However, rotating components are always subject to unbalance which causes a harmonic force excitation during operation and can thereby cause noise and damage. To counteract this, rotors are balanced by adding or removing mass. If the achievable balancing quality is not sufficient or the unbalance changes during operation, active measures can be used for online balancing during operation. The latest active balancing device in this research area is an active bearing with rotating piezo actuators. Its functionality has already been demonstrated in laboratory tests, with a 99% reduction in power consumption compared to conventional piezo bearings. However, unexplained side effects occur in the experiments, such as strong third-order vibrations and static displacements of the rotor during an active operation, which are caused by the three rotating actuators. The research project presented in this proposal investigates the fundamentals of an active bearing with rotating piezo actuators within the load path. The aim of the project is to explain and describe the rotor dynamic effects that occur and to investigate the potential of the bearing for other applications, such as energy harvesting and active vibration control of gearboxes. For this purpose, the active bearing, including non-linear effects such as electrical and mechanical hysteresis, has to be modelled which is accompanied by experiments on a test bench for validation. The model will then be used to simulate the side effects and transfer the insights to an active bearing with more actuators and different used piezo material. The prototype will be first used for active balancing. A model-free control has to be implemented and validated for this task. Furthermore, it will be investigated how much energy can be generated from the deformation of the actuators caused by constant loads, for example due to the gravitational force, and which dynamic side effects occur during the process. In addition, a semi-active control by means of charge inversion will be investigated in order to generate alternating forces, which can potentially be used for active vibration reduction. Finally, all results will be gathered in order to analyse and evaluate the potential of an active bearing with rotating piezo actuators in terms of active balancing, active vibration reduction, health monitoring and energy harvesting.

旋转机械是技术世界的支柱。它们几乎可以在所有领域找到，如泵，喷气发动机和电动机。然而，旋转部件总是会受到不平衡的影响，这会在运行过程中引起谐波力激励，从而导致噪音和损坏。为了抵消这一点，转子通过增加或减少质量来平衡。如果可达到的平衡质量不够或不平衡在运行期间发生变化，则可以在运行期间使用主动措施进行在线平衡。最新的主动平衡装置在这一研究领域是一个积极的轴承旋转压电致动器。其功能已经在实验室测试中得到验证，与传统的压电轴承相比，功耗降低了99%。然而，无法解释的副作用发生在实验中，如强烈的三阶振动和静态位移的转子在主动操作，这是由三个旋转致动器所造成的。本提案中提出的研究项目调查了在负载路径内带有旋转压电致动器的主动轴承的基本原理，该项目的目的是解释和描述发生的转子动态效应，并调查轴承在其他应用中的潜力，例如能量收集和齿轮箱的主动振动控制。为此，主动轴承，包括非线性效应，如电气和机械滞后，必须建模，这是伴随着在测试台上进行验证的实验。然后，该模型将用于模拟副作用，并将见解转移到具有更多致动器和不同使用的压电材料的主动轴承。该样机将首先用于主动平衡。为此任务，必须实现和验证无模型控件。此外，还将研究由恒定负载（例如，由于重力）引起的致动器变形可以产生多少能量，以及在该过程中发生哪些动态副作用。此外，半主动控制通过电荷反转将被调查，以产生交变力，这可能是用于主动减振。最后，将收集所有结果，以分析和评估具有旋转压电致动器的主动轴承在主动平衡、主动减振、健康监测和能量收集方面的潜力。