关键词: 自动控制技术, 半捷联, 导引头, 双环, 变结构控制

Abstract: The mathematic model is established to ensure the system semi-strapdown seekers robustness in the environment of a variety of disturbances and uncertainties. Through analyzing the influence of semi-strapdown platform from interference moment, missile disturbances and structure parameter change, the double-loop sliding variable structure controller is proposed. By theoritical research and mathematic simulation, the results prove that the double-loop sliding variable structure controller can be applied with the precise angular position sensor and excellent differential algorithm in semi-strapdown stablized platform servo-loop, and it is adaptive to structure parameter change and it has great robustness to interference moment and missile disturbances.

Key words: automatic control technology, semi-strapdown, seeker, double-loop, variable structure controller