宽幅遥感图像实时滚屏显示技术中的反馈控制

Feedback Control in Scrolling Displaying of Remote Sensing Image

为了增强卫星遥感图像的滚屏显示性能,提出了滚屏速率和刷新速率的反馈控制方法.给出速率控制模块结构,在此基础上建立滚屏速率的连续反馈控制模型,并通过反向差分公式,将其变换为程序可实现的离散反馈控制模型.实验给出了控制参数调整方法,仿真显示输出速率波动频率与跟踪性能与理论分析一致.同时建立刷新速率的反馈控制方法,帮助系统适应不同速率的数据源及不同性能的图形工作站,动态调整刷新速率,达到最佳的遥感图像滚屏显示效果.

For the purpose of enhancing the function of scrolling display for satellite remote sensing images,a feedback approach to control the scrolling velocity and refreshing velocity has been proposed. Based on the structure of velocity control module,the continuous feedback control model is established and transformed it into a programmatically feasible discrete feedback control model through the backward difference equation. The means of adjustment to control parameters can be obtained in experiment. Simulation shows that the fluctuation frequency of output velocity and its tracing property is consistent with the theoretical analysis. Furthermore,to achieve the optimized performance of scrolling display,the feedback control approach for refreshing velocity is also realized,which is very helpful to promote the system adapting the data sources with various velocities or from the graphical stations of various performance,as well as to dynamically adjust refreshing velocity.