access icon free Performance recovery of intelligent digital redesign for observer-based output feedback under immeasurable premise variables

This study discusses an intelligent digital redesign (IDR) for observer-based output-feedback controllers in Takagi–Sugeno form under immeasurable premise variables. A delta operator that asymptotically connects an analogue control system with its discrete-time model is adopted. The condition for the IDR problem with stability is proposed in terms of matrix inequality. The authors show that the proposed IDRed sampled-data controller recovers the analogue control performance from the perspective of the closed-loop trajectory under the fast sampling limit.

Inspec keywords: sampled data systems; feedback; matrix algebra; discrete time systems; stability; closed loop systems; observers

Other keywords: matrix inequality; Takagi-Sugeno form; IDRed sampled-data controller; immeasurable premise variables; closed-loop trajectory; performance recovery; intelligent digital redesign; discrete-time model; analogue control system; delta operator; observer-based output-feedback controllers; sampling limit; stability

Subjects: Stability in control theory; Algebra; Simulation, modelling and identification; Discrete control systems

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-cta.2014.1152
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