4 January 2008 A fast initial alignment of MIMU in the two-dimension trajectory correction fuze for spinning projectile on stationary base
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Abstract
In the paper, a fast initial alignment of strapdown MIMU used in the two-dimension trajectory correction fuze was analyzed. According to the situation that MIMU can't work normally because of high shock on shrapnel of Compound Extended Range by Base Bleed and Rocket at firing, the MIMU in initial alignment with Bar-Itzhack and Berman's error model is presented and the observability was analyzed. It shows that the observability of MIMU on stationary base is poor. The selection of unobservable states was discussed. A Kalman filter estimation algorithm was provided, but the azimuth error converges very slowly in initial alignment. A fast estimation method of the azimuth error was proposed. It reveals that the azimuth error can be entirely estimated from the estimates of leveling error and leveling error rate without gyro output signal. It shows that the method can realize the rapid initial alignment of MIMU.
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Qin Wang, Qin Wang, Shi-yi Li, Shi-yi Li, Hong-bing Xiao, Hong-bing Xiao, Hu-quan Li, Hu-quan Li, } "A fast initial alignment of MIMU in the two-dimension trajectory correction fuze for spinning projectile on stationary base", Proc. SPIE 6836, MEMS/MOEMS Technologies and Applications III, 683618 (4 January 2008); doi: 10.1117/12.756975; https://doi.org/10.1117/12.756975
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