Integrated Autopilot Guidanceand Control Design Based on 2-order Sliding Mode for Extended Range Guided Projectiles

doi:10.3969/j.issn.1000-1093.2016.12.010

Abstract

Abstract: A 2-order sliding mode(2-SM) controller is proposed for an integrated guidance and control (IGC) design of extended range guided projectiles (ERGP). The canard loop is modeled as first-order dynamics. Considering the characteristics of ERGP, a linear model for IGC design is established based on the initial line-of-sight(LOS) with the assumption of a small disturbance. Then the linearized longitudinal integrated dynamics is formulated, in which the discrepancies from the target maneuver and the aerodynamic parameters are included. The quasi-continuous sliding mode control algorithm is adopted for a 2-SM IGC design for regulating the LOS rate to zero in finite time. To demonstrate the benefits of IGC, a separated robust autopilot and guidance law are also presented via the conventional SM control theory. Simulated results show that the proposed IGC controller is superior in that the miss distance is reduced.

Key words: ordnance science and technology, extended range guided projectile, integrated guidance and control, 2-order sliding mode, quasi-continuous sliding mode control algorithm

CLC Number:

TJ413⁺.6

YANG Jing， SHI Jin-guang， LI Xiao-yuan, WANG Zhong-yuan， CHANG Si-jiang. Integrated Autopilot Guidanceand Control Design Based on 2-order Sliding Mode for Extended Range Guided Projectiles[J]. Acta Armamentarii, 2016, 37(12): 2251-2258.

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