Feedback control in scrolling displaying of remote sensing image

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.