Research on Tracking Strategy of Roll-pitch Seeker

doi:10.12382/bgxb.2023.0977

Abstract

Abstract:

In order to simplify the tracking process of roll-pitch seeker, a tracking scheme for roll-pitch structure is proposed and experimentally proven.The working principle and characteristics of roll-pitch seeker are analyzed, and a new method for tracking the targets based on aeliminating image rotation mechanism is proposed, which can be easily and effectively applied in engineering practice. Compared with traditional coordinate conversion methods, the accuracy of the proposed method is less affected by mechanical errors such as optical axis, and has higher fault tolerance, applicability, and real-time performance. It can also compensate for the disturbances in any direction through feedback from angular rate gyroscope data. In addition, based on the different installation methods of gyroscopes, the stability formula is obtained by deriving the stabized platform state of the seeker and the relative motion relationship between the seeker and the missile body, and the design of the control system is completed. Finally, rhe experimental verification is conducted through semi-physical simulation.The static tracking experimental results demonstrate the practicality of the proposed tracking method. The traditional coordinate conversion method and the proposed method are used for tracking in the dynamic tracking experiment. Dynamic experimental results show that the proposed method is still applicable in the presence of carrier disturbances. Compared with traditional coordinate conversion methods, the proposed method significantly improves tracking accuracy, reducing the RMSE values of x-axis and y-axis tracking errors by 79.10% and 90.04%, respectively.

Key words: seeker, roll-pitch type, stabilized platform, servo system

CLC Number:

TJ765.3

YAO Jiazhi, SONG Yansong, SONG Jianlin, WANG Wei, AN Yan. Research on Tracking Strategy of Roll-pitch Seeker[J]. Acta Armamentarii, 2024, 45(11): 4031-4038.

Figures/Tables 12

Fig.1 System block diagram

Fig.2 Coordinate system definition

Fig.3 Structural diagram of Coude optical system

Fig.4 Infrared detector field of view

Fig.5 Gyro installation position

Fig.6 Schematic diagram of closed-loop stable tracking

Fig.7 Experimental system for tracking

Fig.8 Target imaging in the field of view

Fig.9 Target tracking status after executing tracking instructions

Fig.10 Motion trajectory of target in the field of view

Fig.11 racking accuracy of coordinate conversion method

Fig.12 Tracking accuracy of the eliminating image rotation method

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