1 Synthesis for a Large Flexible Space Structure Experimental Testbed

An application is presented of1 synthesis to the robust control of a large  exible space structure experimental testbed called Daisy. A perturbed left-coprime factorization of Daisy’s dynamics is used to capture the uncertainty in the modes. Designs of the 1 synthesis controller based on left-coprime factorizations of 46th-order collocated and noncollocatedmodels of Daisy are presented together with simulation and experimental results. These results are compared to those obtained with H1 1 controllers, and it is shown that the 1 controllers performed better. These controllers provide robust performance with respect to given bounds on modal parameter uncertainties without resorting to computationally complex techniques involving real structured perturbations.