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估计噪声方差与Kalman滤波的传感器动态补偿

, PP. 13-17

Keywords: 动态补偿,噪声,方差估计,滤波

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Abstract:

传感器动态补偿后的输出噪声被加重且方差未知.为有效地抑制补偿后的噪声干扰,研究了一种在未知观测噪声方差条件下,采用卡尔曼滤波去噪的传感器动态补偿算法.补偿器的参数通过参考模型和系统辨识的方法得到,同时,利用参考模型建立卡尔曼滤波器,消除高频噪声对测量精度的影响.由于补偿器的输出信号可以用一个M阶多项式分段逼近,利用小波消失矩原理对输出信号的噪声进行方差估计,从而解决了在未知观测噪声的条件下卡尔曼滤波失效问题.最后,通过仿真和应用实验,验证了该方法的有效性.

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