Abstract

A dynamic vibration absorber can effectively reduce the vibration of a mechanical system, and designing a new type of torsional vibration absorber to reduce the torsional vibration of the vehicle powertrain system and establishing relevant experiments to test its vibration reduction performance are necessary. This article presents a detailed design and manufacturing process of an innovative torsional vibration absorber with magnetorheological elastomers (MREs) as its core intelligent element. A series of experiments are carried out to evaluate the vibration reduction performance of the new vibration absorber. A vibration reduction performance experiment with a torsional vibration exciter is used to test the vibration transmissibility of the vibration absorber, and the frequency shift range is identified. An engine vibration reduction performance experiment is carried out to verify the feasibility of the vibration absorber in actual powertrain systems, and its good vibration reduction effect is also proven by comparative experiments. A semi-active control experiment of the vibration absorber is performed to verify the reliability of the programmable power supply and the conductive slip ring and prove the effectiveness of the dominant external excitation frequency identification method and vibration absorber control strategy.

摘要

动态吸振器可以有效地降低机械系统的振动，设计一种新型扭转吸振器来降低汽车动力总成系统的扭转振动并建立相关实验来测试其减振性能是十分必要的。本文介绍了一种以磁流变弹性体 (MRE) 作为核心智能元件的创新型扭转减震器的详细设计和制造过程。进行了一系列实验来评估新型减振器的减振性能。采用扭振激振器进行减振性能实验，测试减振器的振动传递率，确定频移范围。为了验证该减振器在实际动力总成系统中的可行性，进行了发动机减振性能实验，并通过对比实验证明了其良好的减振效果。进行了减振器半主动控制实验，验证了可编程电源和导电滑环的可靠性，证明了主外激频率辨识方法和减振器控制策略的有效性。