Closed-loop results of a compact high-speed adaptive optics system with H∞

Active control of adaptive optics system in a large segmented mirror telescope

“…Figure 7 shows the singular value plot of the plant. Compared with the segmented space telescope model investigated in (Li, Kosmatopoulos, Ioannou and Ryaciotaki-Boussalis, 2000) and (Whorton, 2003) and the AO systems in (Frazier, 2003) where the number of the Input-Output (IO) channels range from 18 to 162 and the number of the states range from 70 to 200, the model has significantly larger dimension and it is difficult to take the same approach to design the controller.…”

Wavefront correction of optical beam for large space mirrors using robust control techniques

“…Frazier et al applied the robust control technique for an adaptive optics testbed with a 37 channel deformable mirror [4][5][6][7]. Other works have begun to apply advanced control techniques to large ground based telescopes that have more structural flexibility than previous generation telescopes, similar to what space-based telescopes will experience [8][9][10].…”