Mathematics – Optimization and Control
Scientific paper
2007-11-22
IEEE Transactions on Automatic Control, vol. 52, no. 12, pp. 2390-2394, Dec 2007
Mathematics
Optimization and Control
13 pages, no figures. A slightly modified version is scheduled to appear in IEEE Transactions on Automatic Control, Dec 2007
Scientific paper
10.1109/TAC.2007.904253
This article is concerned with stability analysis and stabilization of randomly switched nonlinear systems. These systems may be regarded as piecewise deterministic stochastic systems: the discrete switches are triggered by a stochastic process which is independent of the state of the system, and between two consecutive switching instants the dynamics are deterministic. Our results provide sufficient conditions for almost sure global asymptotic stability using Lyapunov-based methods when individual subsystems are stable and a certain ``slow switching'' condition holds. This slow switching condition takes the form of an asymptotic upper bound on the probability mass function of the number of switches that occur between the initial and current time instants. This condition is shown to hold for switching signals coming from the states of finite-dimensional continuous-time Markov chains; our results therefore hold for Markov jump systems in particular. For systems with control inputs we provide explicit control schemes for feedback stabilization using the universal formula for stabilization of nonlinear systems.
Chatterjee Debasish
Liberzon Daniel
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