Strapdown Optical Seeker Guidance Instructions Extraction and System Stability

Abstract:

In order to realize the guidance and control of the flight system, we focused on the study of different guidance instructions extraction methods and system stability control problems with respect to the characteristics of full-strapdown optical imaging seeker. First, we established the model of strapdown optical imaging seeker and introduced the definition of scale factor and the theoretical compute formula. Then the full field of view accuracy of full-strapdown optical imaging seeker was gained through the experiment and the validity of the scale factor definition has been tested and verified. Finally, we analyzed the system stabilities of different guidance instructions extraction methods. The results showed that if we applied the line of sight angular rate (LOS angular rate) to the system, the scale factor error was 5% when the free-running frequency of the overload autopilot was 20rad/s, and the scale factor error was 8.4% when the free-running frequency was 10rad/s. And if we applied the line of sight angle (LOS angle) to the system, the scale factor error was 33.3%, irrelevant to the free-running frequency. This analysis laid a foundation of guidance application..

• Periodical: Applied Mechanics and Materials (Volumes 397-400)
• Pages: 1357-1361
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.397-400.1357
• Online since: September 2013
• Authors: Yue Zhang
• Keywords: Instruction Method, Scale Factor, Strapdown Optical Seeker, System Stability

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