Showing papers in "Systems & Control Letters in 2013"

TL;DR: A continuous feedback controller is designed for the switched system, which guarantees that asymptotic output tracking is achieved without transgression of the constraints and all closed-loop signals remain bounded, provided that the initial states are feasible.

TL;DR: A new class of observer-based control algorithms are designed for achieving finite-time consensus tracking in multi-agent systems with a single active leader, where each agent can only share its position states with its neighbors.

TL;DR: This paper studies the leader-following consensus problem for a group of agents with identical linear systems subject to control input saturation, focusing on two classes of linear systems, neutrally stable systems and double integrator systems, and establishes that global consensus can be achieved by linear local feedback laws over a fixed communication topology.

TL;DR: This paper studies the distributed consensus tracking problem of linear higher-order multi-agent systems with switching directed topologies and occasionally missing control inputs and appropriately constructing a switching Lyapunov function and using tools from the M -matrix theory.

TL;DR: A new adaptive scheme is proposed to ensure the bounds of the control torques as functions of only design parameters and reference trajectories and thus computable in advance to overcome the difficulties due to input torque saturation and external disturbances.

TL;DR: A variable transformation method is used to convert the consensus problem to a partial stability problem for multi-agent systems with inherent nonlinear dynamics under directed topologies under fixed and switching topologies.

TL;DR: In this paper, a tube model predictive control (MPC) scheme for continuous-time nonlinear systems based on robust control invariant sets with respect to unknown but bounded disturbances is presented.

TL;DR: Experimental results show that the nuclear norm optimization approach to subspace identification is comparable to the standard subspace methods when no inputs and outputs are missing, and that the performance degrades gracefully as the percentage of missing inputs and Output increases.

TL;DR: Several conditions are proposed to check different robustness properties for generic nonlinear systems applying the weighted homogeneity concept and it is shown that, under some mild conditions, the system robustness can be established as a function of the degree of homogeneity.

TL;DR: By using a small gain approach, sufficient conditions are provided, which involve both the delay and the sampling period, ensuring exponential convergence of the observer system error, which is robust with respect to measurement errors and perturbations of the sampling schedule.

TL;DR: The consensus problems of the continuous-time integrator systems under noisy measurements are considered and constant consensus gains are properly selected, such that mean square consensus and strong consensus can be achieved.

TL;DR: The purpose of the addressed problem is to design a time-varying controller such that, for all probabilistic missing observations and admissible parameter uncertainties, the H ∞ consensus performance is guaranteed over a given finite horizon for the closed-loop networked multi-agent systems.

TL;DR: The sufficient condition for robust asymptotic stability of the closed-loop system via state observer-based control is presented, which is less conservative than some existing ones in recent literature.

TL;DR: This paper converts the cooperative global adaptive output regulation problem for a class of nonlinear uncertain multi-agent systems subject to an uncertain leader system into a global adaptive robust stabilization problem of a distributed augmented system and shows that the unknown parameters in the leader system can be exactly estimated provided that the distributed internal model is of minimal order.

TL;DR: The truncated predictor feedback design method is extended and it is shown that, for the stability of the closed-loop system, the maximum allowable time-delay in the input is inversely proportional to the sum of the unstable poles in the plant.

TL;DR: An analytic characterization of how the addition of edges improves the performance is provided, and it is shown that it is related to the inverse of the cycle lengths and the number of shared edges between independent cycles.

TL;DR: This paper proposes the design method for the sliding-mode controller with a disturbance predictor and analyzes the stability of the closed-loop system.

TL;DR: This paper develops a two-step backstepping control design by introducing an intermediate target system and an intermediate control, and the exponential stability of the closed-loop system is investigated using the Lyapunov method.

TL;DR: This paper contains necessary and sufficient characterizations of both properties in terms of Lyapunov functions of incremental stability concepts, showing under what additional assumptions one property indeed implies the other.

TL;DR: Under a strong invariance condition, notions of entropy for invariance for discrete-time control systems are compared and it is shown that they are essentially equivalent.

TL;DR: By utilizing a new compact convex hull representation of the saturation nonlinearity, a linear matrix inequalities (LMIs) based condition is obtained for testing the local and global stability of the considered nonlinear system.

TL;DR: A new comparison principle method is successfully applied to study the consensus problem of second-order multi-agent systems with switching topologies by designing a time-delayed impulsive consensus control scheme.

TL;DR: By parameterization of unknown nonlinear dynamics, a Lyapunov technique in conjunction with homogeneity technique is presented for designing a decentralized adaptive finite-time consensus control protocol in undirected networks.

TL;DR: The main aim here is to investigate its ergodic property and positive recurrence by stochastic Lyapunov functions under small perturbation, which can be used to explain some recurring phenomena in practice and thus provide a good description of permanence.

TL;DR: In this article, it is shown that, if the inertia matrix is constant, constant disturbances (both, matched and unmatched) can be rejected simply adding a suitable integral action at the passive output.

TL;DR: This work examines the consensus control problem for a class of partial differential equations with a Riesz-spectral state operator and obtains an explicit bound on the convergence rate of the pairwise state errors.

TL;DR: It is shown that, if the communication delays are bounded by an upper bound, and the cooperation weights and the sampling period are designed appropriately, the overall system state converges to the equilibrium point.

TL;DR: A unit dual quaternion based tracker is proposed based on the error dynamics, which is proven to render the equilibrium point of the closed loop system asymptotically stable, and includes the attitude and position regulation problems as particular cases.

TL;DR: An adaptive observer form is derived which can be utilized in designing the reduced order state observer and results are given to exhibit the effectiveness of proposed synthesis approaches in dealing with the practical systems.

TL;DR: Decentralized stabilizability for multi-agent systems with general linear dynamics is studied, and it is proved that the system is stabilizable if and only if external control inputs are exerted on some indicated agents.