Proceedings PaperAn Optical Platform For Testing Space-Based Optics Control Algorithms
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A number of promising approaches have been investigated for controlling multiple adaptive optics elements in space-based wide field-of-view telescopes. However, the individual control algorithms, and sensing and control components have never been evaluated against one another in simulation or hardware. The Air Force is undertaking an inhouse program in the RADC Optical Systems Engineering Laboratory called OPTECAL for "OPtical TEstbed for Control ALgorithms". The OPTECAL program will combine extensive analyses with hardware tests using a state-of-the-art platform to validate this control, with emphasis on the algorithms. Individual control and sensing components and algorithms, as well as integrated control system approaches, will be evaluated on the platform. An effort was recently completed to identify the key parameters the platform should address and to provide a preliminary testbed design incorporating these parameters. The design completion and construction of the OPTECAL platform will begin late in 1984 and delivery is expected in early 1986. Preliminary control simulations and experiments are now underway at RADC in preparation for the future OPTECAL studies. Initial milestones include the establishment of a basic adaptive optics test setup, a proof-of-concept deconvolution experiment, development of an optical modeling capability, and studies evaluating "deconvolution" techniques, phase retrieval approaches, and the effects of actuator transfer function uncertainties in wide field-of-view optics control. Later milestones include fully traceable experiments on the OPTECAL platform to optimize the integrated control system performance.