Feasibility study on the active structural attenuation of multiple band vibrations from two dimensional continuous structures in automotive vehicles

IF 2.1 4区 工程技术
Dongwoo Hong, Hojoon Moon, Byeongil Kim
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引用次数: 0

Abstract

Automotive engine mounts have recently begun using active elements, while prior studies did not account for the actual engine mounting position. The placement and orientation of real automobile engine mounts are considered when modeling, analyzing, and controlling a source structure with an active mounting system. A piezoelectric stack actuator connected in series with an elastomeric mount composes an active mount. When harmonic excitation forces are used, the secondary force required for each active mount is mathematically determined, and the control signal may reduce the vibration by interfering with the input signal. Additionally, the dynamic relationship of the source structure with a variable parameter may be used to reduce horizontal vibrations. Several simulation findings show that these multidirectional (vertical and horizontal) active mounts may minimize excitation vibrations. Additionally, a simulation was performed to reduce vibrations when a complex signal and noise were present. This was achieved by monitoring the system response using the normalized least mean squares (NLMS) algorithm, an adaptive filter. The control performance degrades as noisy and complicated signals are generated; however, the mitigation trend is the same according to simulations utilizing adaptive filters.
汽车二维连续结构多频带振动主动结构衰减可行性研究
汽车发动机支架最近开始使用主动元件,而之前的研究并未考虑发动机的实际安装位置。在对带有主动安装系统的源结构进行建模、分析和控制时,需要考虑实际汽车发动机悬置的位置和方向。压电叠加致动器与弹性支架串联构成主动支架。当使用谐波激振力时,每个有源支架所需的次要力可通过数学方法确定,控制信号可通过干扰输入信号来减少振动。此外,源结构与可变参数的动态关系也可用于减少水平振动。一些模拟结果表明,这些多向(垂直和水平)主动支架可将激振振动降至最低。此外,还进行了一次模拟,以减少存在复杂信号和噪声时的振动。这是通过使用归一化最小均方差(NLMS)算法(一种自适应滤波器)监测系统响应来实现的。随着噪声和复杂信号的产生,控制性能也随之下降;不过,根据利用自适应滤波器进行的模拟,缓解趋势是相同的。
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来源期刊
Advances in Mechanical Engineering
Advances in Mechanical Engineering Engineering-Mechanical Engineering
自引率
4.80%
发文量
353
期刊介绍: Advances in Mechanical Engineering (AIME) is a JCR Ranked, peer-reviewed, open access journal which publishes a wide range of original research and review articles. The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas, and encourages submissions which contribute novel and innovative insights to the field of mechanical engineering
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