Optimization Design of Missile-borne Semi-strapdown Platform Based on Nested Structure of Double Bearing

doi:10.3969/j.issn.1000-1093.2018.04.012

Abstract

Abstract: In order to further reduce the swing angular rate of the platform and improve the accuracy of the solution in the case that the rotational inertia and eccentricity of platform are unchanged, a double bearing nested structure is proposed to reduce the bearing friction force. The nested structure can be used to achieve the secondary isolation of the missile roll angular rate by the internal and external bearing nesting. The theoretical data of friction moments of double bearing nested structure and single bearing structure are obtained by using the operating principle of semi-strapdown platform and SKF bearing friction force algorithm. It is found that the friction moment generated by the double bearing nested structure is 35.7% of the friction moment of single bearing. The ground semi-physical simulation test is necessary to verify the theoretical analysis. The simulated results show that the swing angular rate and roll error of double bearing nested structure-based semi-strapdown inertial navigation system are 50% less than those of semi-strapdown platform with single bearing structure. Double-bearing nested structure is more conducive to high-precision solution than single-bearing structure. Key

Key words: semi-strapdownplatform, doublebearingnestedstructure, innertube, frictionmomentalgorithm

CLC Number:

TJ413⁺.6

ZHENG Tao, LI Jie, HU Chen-jun, JIANG Gui-lin, GUO Li-qiang, QIAN Hai-ning. Optimization Design of Missile-borne Semi-strapdown Platform Based on Nested Structure of Double Bearing[J]. Acta Armamentarii, 2018, 39(4): 724-730.

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第39卷
第4期2018 年4月兵工学报ACTA
ARMAMENTARIIVol.39No.4Apr.2018

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