This paper considers a restricted complexity LQG controller design using an existing iterativeidentification and control design scheme applied to a disturbance rejection problem. The cornerstone of this iterative met...
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This paper considers a restricted complexity LQG controller design using an existing iterativeidentification and control design scheme applied to a disturbance rejection problem. The cornerstone of this iterative method is a frequency weighting derived from experimental closed loop input/output signals. This frequency weighting characterises mismatch between two closed loop systems, one in which the controller design is conducted and the other in which the controller is implemented. It is shown that the frequency weighting is mechanism which translates the closed loop mismatch into better control performance when the enhanced LQG controller acts on the true plant. The results obtained provide an intuitive link between the iterative design method and an existing closed loop controller reduction technique.
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