TY  - EJOU
AU  - Zhu, Yongyun 
AU  - Zhang, Tao 
AU  - Li, Mohan 
AU  - Wang, Di 
AU  - Wu, Shaoen 

TI  - A Coarse Alignment Based on the Sliding Fixed-Interval Least Squares Denoising Method
T2  - Computers, Materials \& Continua

PY  - 2019
VL  - 61
IS  - 3
SN  - 1546-2226

AB  - The observation vectors in traditional coarse alignment contain random noise caused by the errors of inertial instruments, which will slow down the convergence rate. To solve the above problem, a real-time noise reduction method, sliding fixed-interval least squares (SFI-LS), is devised to depress the noise in the observation vectors. In this paper, the least square method, improved by a sliding fixed-interval approach, is applied for the real-time noise reduction. In order to achieve a better-performed coarse alignment, the proposed method is utilized to de-noise the random noise in observation vectors. First, the principles of proposed SFI-LS algorithm and coarse alignment are devised. A simulation test and turntable experiment were executed to demonstrate the availability of the designed method. It is indicated that, from the results of the simulation and turntable tests, the designed algorithm can effectively reduce the random noise in observation vectors. Therefore, the proposed method can enhance the performance of coarse alignment availably.
KW  - Coarse alignment
KW  -  observation vectors
KW  -  real-time noise reduction
KW  -  sliding fixed-interval least squares

DO  - 10.32604/cmc.2019.06406