%0 Journal Article
%T 基于自适应反馈控制的座椅振动主动控制方法研究<br>Research on Seat Vibration Active Control Method Based on Adaptive Feedback Control
%A 申连洋
%A 吴磊
%A 丁亮
%A 文浩宇
%J Open Journal of Acoustics and Vibration
%P 97-109
%@ 2328-0522
%D 2020
%I Hans Publishing
%R 10.12677/OJAV.2020.84012
%X <div style=\"text-align:justify;\">
	<span style=\"font-size:14px;\">本文研制了一套座椅主动减振系统，通过抑制座椅下方基础结构上的低频线谱振动，降低振动向座椅的传递，从而提高座椅的舒适性。该系统将传感器与主动执行器集成在一起，形成传感作动一体化的智能吸振器。采用自适应反馈FxLMS算法作为控制策略，有利于提高该系统在不同应用环境中的适应性和稳定性。然而，该算法在应用中由于机械结构和控制系统中存在的非线性，容易造成高次谐波振动的放大现象。为此，本文提出一种参考信号的预处理方法，通过将参考信号转化为矩形波并提取高次谐波分量的方法合成新的参考信号，从而实现对高次谐波振动的抑制，以解决座椅振动主动减振中高次谐波的放大现象。为验证本文提出方法的有效性，在实验室中搭建了座椅减振试验验证平台，该平台以矩形钢板作为基础结构，以模拟振源作为初级激励。试验结果表明本文提出的方法在实现基频振动大幅降低的同时，可有效解决座椅主动减振中出现的高次谐波放大问题。<br />
In this paper, an active vibration control system of the seat is developed, which can reduce the transmission of vibration to the seat by suppressing the low-frequency harmonic vibration on the infrastructure underneath the seat, thus improving the comfort of the seat. The system integrates sensors with active actuators to form an intelligent vibration absorber with integrated sensing action. The adaptive feedback filter LMS algorithm is used as the control strategy to improve the adaptability and stability of the system in different application environments. However, the higher-order harmonic vibration may deteriorate due to the non-linearity in the structure and the control system. To alleviate the phenomenon, a pre-processing method of reference signal is proposed, which synthesizes the new reference signal by converting the reference signal into rectangular wave and extracting high-order harmonic components, so as to suppress the high-order harmonic vibration and solve the amplification phenomenon of the high-order harmonic in the active vibration reduction of the seat. A verification platform for seat vibration reduction test is built in the laboratory, which uses rectangular steel plate as the foundation structure and simulated vibration source as the primary excitation. The test results show that the higher-order harmonics of the foundation structure and the seat is significantly reduced when the fundamental frequency vibration is well controlled.</span> 
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%K 座椅减振，主动控制，智能吸振器，自适应反馈控制<br>Seat Suspension
%K Active Control
%K Intelligent Vibration Absorber
%K Adaptive Feedback Control
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=39228