| 电液伺服振动台加速度谐波抑制 |
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| 引用本文： | 姚建均,胡胜海,韩俊伟. 电液伺服振动台加速度谐波抑制[J]. 机械工程学报, 2010, 46(3). DOI: 10.3901/JME.2010.03.022 |
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| 作者姓名： | 姚建均 胡胜海 韩俊伟 |
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| 作者单位： | 1. 哈尔滨工程大学机电工程学院,哈尔滨,150001
2. 哈尔滨工业大学机电工程学院,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目(50905037) |
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| 摘 要： | 由于电液伺服振动台中存在着伺服阀死区、连接铰间隙和摩擦力以及液压缸摩擦力等非线性因素,导致振动台在正弦信号激励下,其加速度响应信号中存在高次谐波失真现象。在对死区、间隙、摩擦补偿相关文献的研究基础上,针对加速度信号中的高次谐波,提出了基于自适应陷波器技术的自适应谐波抑制策略。其参考信号频率为要抑制的谐波频率,利用最小均方自适应滤波算法,根据输入加速度信号与反馈加速度信号间的误差信号,实时在线调整自适应滤波器的权值。参考信号经过自适应滤波器的加权作用,得到自适应滤波器的输出,它是一个谐波复制信号,并与输入加速度信号相加,以抑制输出加速度信号中的谐波,进而使总谐波失真度大大降低。
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| 关 键 词： | 死区 间隙 摩擦 谐波抑制 自适应滤波算法 |
Acceleration Harmonic Cancellation of Electro-hydraulic Servo Shaking Table |
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| YAO Jianjun,HU Shenghai,HAN Junwei. Acceleration Harmonic Cancellation of Electro-hydraulic Servo Shaking Table[J]. Chinese Journal of Mechanical Engineering, 2010, 46(3). DOI: 10.3901/JME.2010.03.022 |
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| Authors: | YAO Jianjun HU Shenghai HAN Junwei |
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| Affiliation: | 1. College of Mechanical and Electrical Engineering/a>;Harbin Engineering University/a>;Harbin 150001/a>;2. School of Mechatronic Engineering/a>;Harbin Institute of Technology/a>;Harbin 150001 |
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| Abstract: | Nonlinearities are inherent in electro-hydraulic servo shaking table. Some nonlinearities are dead zone of servo valve, backlash and friction between joints, and friction in hydraulic cylinder. Nonlinearities cause harmonic distortion of the output acceleration signal corresponding to a sinusoidal input. On the basis of extensive studies on literature related to dead zone, backlash and friction compensation scheme, an adaptive harmonic suppression strategy based on adaptive notch filter technology is propos... |
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| Keywords: | Dead-zone Backlash Friction Harmonic suppression Adaptive filtering algorithm |
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