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In this paper, a novel backtracking scheme is investigated to shorten the time of the attitude determination-based initial alignment. Based on the investigated backtracking scheme, the recorded data during the forward process is reversed and connected with the forward data, which is further used to construct the vector observations for the attitude determination based initial alignment. The investigated...
When systemic rotation autocompensation technique is implemented in inertial navigation system (INS), inertial measurement unit (IMU) undergoes intentionally devised mechanical motions. This technique is one of the strategies of improving the system precision performance at the system level. A dual-axis continuous rotation scheme is introduced, and system error equation is derived. The behaviors of...
In order to improve precision of Gyroscope FreeStrapdown Inertial Navigation System (GFINS), the idea of rotation modulation is adopted. And a new scheme of GFINS using 10 accelerometers is proposed, which is convenient for modulation all of the accelerometers. Through rotating around three orthogonal axes respectively, biases of all 10 accelerometers in the GFINS can be modulated by sinusoid and...
Accelerometer is one of the most important units in inertial navigation system. Its mathematical model is established, and its output equation is derived. Reconstructing acceleration signal in frequency-domain is adopted in order to reduce the integration error in inertial navigation position calculation. To restrain the Gibbs phenomenon in the reconstruction of acceleration signal, a new method is...
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