... 双频测深仪 dual-frequency sounder 双频信标 double frequency beacon 双线笔 railroad pen ...
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double e frequency beacon 双频信标
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The error analysis shows that the measurement error is caused by the noise of the accelerometer, discrete double integration, noise of beacon and frequency characteristic error.
对线加速度计辅助惯性姿态角测量的误差分析表明，测量误差由加速度计噪声、二次积分离散化、信标噪声和加速度计频率特性误差组成。
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