An improved computation scheme of strapdown inertial navigation system using rotation technique

Abstract

To improve the accuracy of strapdown inertial navigation system (SINS) for long term applications, the rotation technique is employed to modulate the errors of the inertial sensors into periodically varied signals, and, as a result, to suppress the divergence of SINS errors. However, the errors of rotation platform will be introduced into SINS and might affect the final navigation accuracy. Considering the disadvantages of the conventional navigation computation scheme, an improved computation scheme of the SINS using rotation technique is proposed which can reduce the effects of the rotation platform errors. And, the error characteristics of the SINS with this navigation computation scheme are analyzed. Theoretical analysis, simulations and real test results show that the proposed navigation computation scheme outperforms the conventional navigation computation scheme, meanwhile reduces the requirement to the measurement accuracy of rotation angles.

Keywords

strapdown inertial navigation system / rotation technique / navigation computation scheme / error characteristic

References

[1] GIOVANNI S C, LEVINSON E. Performance of a ring laser strapdown marine gyrocompass [C]// ION 37th Annual Meeting. Annapolis Meryland, 1981: 28–40.

[2] TittertonD. H., WestonJ. L.Strapdown inertial navigation technology [M], 2004United KingdomInstitution of Electrical Engineers335-360

[3] ZhouY.-y., XuJ.-n., GaoJ.-dong.Marine navigation system [M], 2006BeijingNational Defense Industry Press19-46

[4] LEVINSON E, MAJURE R. Accuracy enhancement techniques applied to the marine ring laser inertial navigation (MARIN) [C]// ION National Technical Meeting. Anaheim, CA, 1987: 71–80.

[5] ISHIBASHI S, TSUKIOKA S, YOSHIDA H. Accuracy improvement of an inertial navigation system brought about by the rotational motion [C]// OCEANS 2007-Europe. Aberdeen, Scotland, United Kingdom, 2007: 1–5.

[6] SunF., SunWei.. Research on auto-compensation by rotation in strapdown inertial navigation systems [J]. Systems Engineering and Electronics, 2010, 32(1): 122-125

[7] JangG. L., ChanG. P., HeungW. P.. Multi-position alignment of strapdown inertial navigation system [J]. IEEE Transactions on Aerospace and Electronic Systems, 1993, 29(4): 1323-1328

[8] ChungD., LeeJ. G., ParkC. G., WuP. H.. Strapdown INS error model for multi-position alignment [J]. IEEE Transactions on Aerospace and Electronic Systems, 1999, 32(2): 1362-1366

[9] LEVINSON E, HORST J. The next generation marine inertial navigator is here now [C]// IEEE Position Location and Navigation Symposium. Las Vegas, NV, USA, 1994: 121–127.

[10] LAHHAN J I, BRAZELL J R. Acoustic noise reduction in the MK49 ship’s inertial navigation system (SINS) [C]// IEEE Position Location and Navigation Symposium. Monterey, CA, USA, 1992: 32–39.

[11] TUCHER T, LEVINSON E. The AN/WSN-7B marine gyrocompass/ navigator [C]// ION Nation Technical Meeting. Anaheim, CA, USA, 2000: 348–357.

[12] YangY., MiaoL.-juan.. Fiber-optic strapdown inertial system with sensing cluster continuous rotation [J]. IEEE Transactions on Aerospace and Electronic Systems, 2004, 40(4): 1173-1178

[13] ZhangH.-l., WuY.-x., WuW.-qi.. Improved multi-position calibration for inertial measurement units [J]. Measurement Science and Technology, 2010, 21(1): 1-11