In this study, an attempt has been made to design an output feedback controller for local stabilisation of uncertain linear time-invariant plant with bounded control inputs. The design is accomplished via parametric H∞ loop-shaping control by describing the uncertainty as perturbations to normalised coprime factors of the shaped plant. The shaped plant is designed based on the closed-loop design specifications by appropriately choosing the weighting transfer function matrices. For the existence of stabilising controller, a set of sufficient conditions has been derived in linear matrix inequality framework and subsequently, a region of attraction is estimated such that the control inputs never exceed the pre-specified bounds. To illustrate the effectiveness of the proposed method, a numerical example has been elucidated.
Inspec keywords: stability; H∞ control; linear matrix inequalities; uncertain systems; control system synthesis; feedback; transfer function matrices; linear systems
Other keywords:
Subjects: Stability in control theory; Linear algebra (numerical analysis); Control system analysis and synthesis methods; Optimal control
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