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Noise Suppression Method of Power Amplifier Current Sensor Based on Adaptive Wavelet

机译:基于自适应小波的功率放大器电流传感器噪声抑制方法

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The output of the current sensor in active magnetic bearing power amplifier system contains a lot of noise, which will cause the output of the power amplifier to be saturated. Using a traditional second-order low-pass filter to suppress noise will give rise to the phase lag. This paper presents an adaptive wavelet method to suppress the high-frequency noise in current sensor signals. Discrete wavelet transform is applied to estimate the noise of the current sensor, and input the estimated noise into the adaptive filter to suppress correlated components from the reference signal. Theoretical analysis and simulation results show that the noise suppress result of the adaptive wavelet method is better than that of the second order low-pass filter.
机译:电流传感器在主动磁轴承功率放大器系统中的输出包含大量噪声,这将导致功率放大器的输出饱和。 使用传统的二阶低通滤波器抑制噪声会产生相位滞后。 本文提出了一种自适应小波法,用于抑制电流传感器信号中的高频噪声。 应用离散小波变换来估计电流传感器的噪声,并将估计的噪声输入到自适应滤波器中以抑制来自参考信号的相关分量。 理论分析和仿真结果表明,自适应小波法的噪声抑制结果优于二阶低通滤波器的噪声抑制结果。

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