基于Morlet小波滤波提高系统参数识别精度的方法

来源 :南京航空航天大学学报（英文版） | 被引量 : 0次 | 上传用户：Wayne_poplar

【摘要】

：

提出了一种基于连续小波变换的时频域滤波方法,用于频响函数估计前的信号预处理.采用Morlet小波构造一种FIR滤波器对信号滤波,不会引起相位失真.提出了一种改进的小波基以满

【出处】

：

南京航空航天大学学报（英文版）

【发表日期】

：

2004年期

【关键词】

：

小波滤波 Morlet小波频率响应函数系统识别 wavelet filtering Morlet wavelet frequency response fu

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提出了一种基于连续小波变换的时频域滤波方法,用于频响函数估计前的信号预处理.采用Morlet小波构造一种FIR滤波器对信号滤波,不会引起相位失真.提出了一种改进的小波基以满足瞬态激励情况的时频域分辨率要求.采用GARTEUR飞机模型构造仿真算例,对仿真数据添加白噪声.仿真结果表明,系统参数识别精度明显改善,滤波后获得的阻尼估计误差较滤波前下降了30%.

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基于Morlet小波滤波提高系统参数识别精度的方法

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