摘要
基于PLL的往复摆动控制方法具有实现电路简单、可靠性高等优点,广泛应用于星载光机扫描型遥感器系统中。然而由于PLL鉴相单元和附加片簧的作用使扫描控制系统呈现复杂的非线性切换特性,难于进行控制回路的分析与设计。文章针对某星载光学遥感器PLL摆动扫描控制系统,详细分析了系统中存在的各种非线性特性,并应用小偏差线性化方法,建立了可供分析与设计的线性化模型,简化了扫描锁相回路设计的难度,在此基础上给出了锁相回路增益的设计准则,并通过仿真验证了模型分析结果的有效性,从而为此类基于PLL的摆动扫描控制系统奠定了理论分析基础和控制器设计依据。
The phase-locked loop （PLL） swing scanning control method is extensively applied for aerospace optics scanning remote sensor, which can be realized with simple and reliable control circuit. However, the control system model is complicated for phase detector non-linearity and switch effect of spring slices, and it is difficult to analysis and design for this control system. The various nonlinear characters in PLL swing scanning control system were analyzed, and a linearized model was obtained by applying small-signal analytic method, which was convenient for analysis and design. Based on the proposed model, the controller design rule was also discussed, and an experiment was carried out to confirm the analysis conclusion.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2013年第6期74-80,共7页
Chinese Space Science and Technology
关键词
摆动扫描
控制系统
非线性系统
锁相环
航天光学遥感
Swing scanning Control system Aerospace optics remote sensing Nonlinear system Phase-locked loop
