【摘要】 为了解决舰船升沉信息测量过程中传统升沉数字滤波器存在输出信号相对于实际信号相位超前的问题,提出了一种基于相位估计与补偿的自适应滤波算法。分析了传统升沉数字滤波器输出相位超前的原因,采用加权傅里叶线性组合频率估计算法实时估计输入信号的频率,并设计自适应FIR滤波器对传统升沉数字滤波器的输出进行相位补偿。将自适应FIR滤波器与传统升沉数字滤波器的估算结果进行模拟实验对比。实验结果表明自适应FIR滤波器输出的升沉位移精度达到厘米级,有效提高了舰船升沉信息测量的准确性和实时性。更多还原

【Abstract】 In view that traditional heave digital filter’s output signal has phase advance relative to the original signal in the process of ship heave information measurement, an adaptive filtering algorithm based on phase estimation and compensation is proposed. The reason of output phase advance of traditional heave digital filter is analyzed. The Weighted-frequency Fourier Linear Combiner frequency estimation algorithm is used to estimate the frequency of the original signal in real time, and the adaptive FIR filter is designed to compensate the phase advance caused by the heave digital filter. Experimental results show that the heave of the adaptive FIR filter output is up to the centimeter level, and the accuracy and real-time performances of ship heave information measurement are effectively improved.更多还原