Hybrid model formulation and stability analysis of a PID-controlled motion system with Coulomb friction - Archive ouverte HAL
Communication Dans Un Congrès Année : 2019

Hybrid model formulation and stability analysis of a PID-controlled motion system with Coulomb friction

Résumé

For a PID-controlled motion system under Coulomb friction described by a differential inclusion, we present a hybrid model comprising logical states indicating whether the closed loop is in stick or in slip, thereby resembling a hybrid automaton. A key step for this description is the addition of a timer exploiting a peculiar semiglobal dwell time of the original dynamics, which then removes defective and unwanted nonconverging Zeno solutions from the hybrid model. Through it, we then revisit an existing proof of global asymptotic stability, which is significantly simplified by way of a smooth weak Lyapunov function. The relevance of the proposed hybrid representation is also illustrated on a novel control strategy resetting the PID integrator and hinging upon the proposed hybrid model.
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Dates et versions

hal-03028141 , version 1 (27-11-2020)

Identifiants

Citer

Andrea Bisoffi, Ruud Beerens, Luca Zaccarian, Maurice Heemels, Henk Nijmeijer, et al.. Hybrid model formulation and stability analysis of a PID-controlled motion system with Coulomb friction. IFAC Symposium on Nonlinear Control Systems (NOLCOS), Sep 2019, Wien, Austria. pp.84-89, ⟨10.1016/j.ifacol.2019.11.760⟩. ⟨hal-03028141⟩
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