基于多频线谱陷波的动力总成振动主动控制研究
Study on Active Control for Powertrain Vibration Based on Multi-frequency Line Spectrum Notch Algorithm
王里达 1丁荣军 2刘侃 2杨军 3雷羿含 2张旗3
作者信息
- 1. 湖南大学 机械工程与运载学院,湖南 长沙 410082;株洲时代新材料科技股份有限公司 材料技术与工程研究院,湖南 株洲 412000
- 2. 湖南大学 机械工程与运载学院,湖南 长沙 410082
- 3. 株洲时代新材料科技股份有限公司 材料技术与工程研究院,湖南 株洲 412000
- 折叠
摘要
针对汽车动力总成系统振动频率存在阶次多、单个阶次振动频带窄等问题,提出了一种基于滤波-x 最小均方算法改进的多频线谱陷波振动主动控制方法.首先,该方法基于转速信号来获取多个阶次振动频率的参考信号,再通过最小均方滤波器来计算获取这些阶次振动频率的抵消信号.其次,该方法根据不同频率阶次振动信号的正交性,进一步以线性叠加计算来获得主动悬置的控制信号,最终实现对多频线谱振动的主动控制.和传统滤波-x 最小均方算法相比,本算法改进了参考信号和控制信号的获取方式,因此有着更少的计算量、更快的收敛速度等优势.仿真和试验结果显示,所提方法比传统滤波-x 最小均方算法,在收敛次数方面减少了81.25%,稳态误差下降了15%.其中,在怠速工况下,和传统滤波-x 最小均方算法比,最高降低了34.01 dB,在定置上升全油门工况下,总振级最高下降了17.5 dB.
Abstract
Aiming at the vibration frequency of automotive powertrain systems with problems such as multiple orders and narrow vibration bands of a single order,this paper proposes a multi-frequency line spectrum notch-filter vibration active control method based on the filtered-x least mean square algorithm.First,the method is based on the rotational speed signal to obtain the reference signals of multiple order vibration frequencies,and then the minimum mean square filter is used to calculate the offset signals of these order vibration frequencies.Secondly,based on the orthogonality of the vibration signals at different frequencies,the method further calculates the control signals with linear superposition to obtain the control signals of active suspension and eventually realizes the active control of multi-frequency line spectral vibration.Compared with the traditional filtered-x least-mean-square algorithm,this algorithm improves the acquisition of reference and control signals and thus has the advantages of less computation and faster convergence speed.Simulation and experimental results show that the proposed method reduces both the number of convergence by 81.25%and the steady-state error by 15%,respectively,compared with the traditional filtered-x least-mean-square algorithm.The maximum reduction is 34.01 dB under idling condition and 17.5 dB under WOT condition,respectively,compared with the traditional filtered-x least mean square algorithm.
关键词
多频线谱/陷波/滤波-x最小均方算法/动力总成/振动主动控制Key words
multi-frequency line spectrum/notch-filter/filtered-x least mean square(Fx LMS)algorithm/powertrain/active vibration control引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据