Stable and convergent iterative feedback tuning of fuzzy controllers for discrete-time SISO systems

作者: Radu-Emil Precup , Mircea-Bogdan Rădac , Marius L Tomescu , Emil M Petriu , Stefan Preitl

DOI: 10.1016/J.ESWA.2012.07.023

关键词: Discrete time and continuous timeLyapunov functionStability (learning theory)Fuzzy control systemControl theoryConvergence (routing)MathematicsServomechanismFuzzy logicAffine transformation

摘要: This paper proposes new stability analysis and convergence results applied to the Iterative Feedback Tuning (IFT) of a class Takagi-Sugeno-Kang proportional-integral-fuzzy controllers (PI-FCs). The is based on convenient original formulation Lyapunov's direct method for discrete-time systems dedicated input affine Single Input-Single Output (SISO) systems. An IFT algorithm which sets step size guarantee suggested. inequality-type condition derived from Popov's hyperstability theory considering parameter update law as nonlinear dynamical feedback system in space iteration domain. IFT-based design low-cost PI-FC case study deals with angular position control current servo laboratory equipment viewed particular SISO system. A comparison performance tuned by an evolutionary-based optimization shows improvement advantages our approach fuzzy control. Real-time experimental are included.

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