基于自适应频率估计的舰船瞬时线运动测量方法

发布时间：2019-03-20 06:55

【摘要】：针对传统舰船瞬时线运动信息测量过程中,IIR数字高通滤波器的输出会存在相位超前,从而使输出信号相对于实际信号存在时间上超前的问题。分析了超前相位对瞬时线运动信息测量的影响,提出了一种基于自适应频率估计的舰船瞬时线运动测量方法。针对IIR数字高通滤波器超前相位的大小随输入信号频率变化的问题,引入了WFLC频率估计算法来实时估计输入信号的频率,提出了自适应延时校正算法来校正由数字高通滤波器带来的输出信息在时间上的超前量。仿真结果表明:提出的改进舰船捷联瞬时线运动测量方法能够很好地解决传统信息测量方法中输出信息在时间上存在超前的问题,实现了实时舰船瞬时线运动信息精确测量,测量精度由0.13 m提高到了0.02 m。
[Abstract]:In the process of measuring the instantaneous line motion information of the traditional ship, the output of IIR digital high-pass filter will have the phase advance, so that the output signal has the problem of lead time relative to the actual signal. In this paper, the influence of advance phase on instantaneous line motion measurement is analyzed, and a method of ship instantaneous line motion measurement based on adaptive frequency estimation is proposed. In order to solve the problem that the leading phase of IIR digital high-pass filter varies with the frequency of input signal, the WFLC frequency estimation algorithm is introduced to estimate the frequency of input signal in real time. An adaptive delay correction algorithm is proposed to correct the time-delay of the output information brought by the digital high-pass filter. The simulation results show that the improved strapdown instantaneous line motion measurement method can solve the problem that the output information in the traditional information measurement method is in advance of the time, and the real-time instantaneous line motion information measurement is realized. The measurement accuracy has been improved from 0.13 m to 0.02 m.
【作者单位】：海军装备研究院舰船所;哈尔滨工程大学自动化学院;中国船舶重工集团第701研究所;
【基金】：国家自然科学基金(61374007,62173081,61104036) 中央高校基本科研业务费专项资金(HEUCFX41309)
【分类号】：U674.70

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