【摘要】 为跟踪坦克行驶状态下的振动频率,改进自适应陷波器的输出方差,将改进的输出方差作为目标函数,通过最小化目标函数确定迭代系数,递推估计出坦克振动信号频率,再通过级联陷波器实现多频率识别。首先使用多体系统传递矩阵法计算坦克的固有频率和响应,然后使用频率识别方法进行对比验证,结果验证了改进频率识别方法有效。最后对某型坦克陀螺仪加速度实测信号进行分析,准确跟踪三个振动频率,结果表明本文改进的频率估计方法可有效估计坦克行进间振动信号的频率。更多还原

【Abstract】 In order to track the vibration frequencies of tanks in moving state, the output RMS of the adaptive notch filter is improved and taken as the objective function. The iterative coefficient is determined by minimizing the objective function, and the tank vibration signal frequency is estimated recursively. Then, the multi-frequency estimation is realized by cascading the notch filter. The natural frequencies and responses of the tanks are calculated by using the transfer matrix method of multibody system, and the frequency identification method is used to verify the effectiveness of the improved frequency identification method. Finally, the measured acceleration signals of a tank gyroscope are analyzed, and three vibration frequencies are accurately tracked. The results show that the improved frequency estimation method can effectively estimate the frequency of vibration signals of tanks.更多还原