Showing papers in "Systems & Control Letters in 2007"

TL;DR: This paper first analyzes a consensus algorithm with a constant reference state using graph theoretical tools, then proposes consensus algorithms with a time-varying reference state and shows necessary and sufficient conditions under which consensus is reached on the time-Varyingreference state.

TL;DR: This work decomposes the problem of optimal linear quadratic Gaussian control of a system whose state is being measured by sensors that communicate with the controller over packet-dropping links into a standard LQR state-feedback controller design, along with an optimal encoder–decoder design for propagating and using the information across the unreliable links.

TL;DR: This paper presents a new result of stability analysis for continuous systems with two additive time-varying delay components, which represent a general class of delay systems with strong application background in network based control systems.

TL;DR: An auxiliary model-based least-squares identification algorithm is developed that indicates that the parameter estimation error consistently converges to zero under a generalized persistent excitation condition.

TL;DR: A local convergence proof via averaging is presented, which exhibits a delicate periodic structure with two sinusoids of different frequencies—one related to the angular velocity of the unicycle and the otherrelated to the probing frequency of extremum seeking.

TL;DR: A characterization of the different classes of Bouc-Wen models in terms of their bounded input-bounded output stability property, and their capability for reproducing physical properties inherent to the true system they are to model is presented.

TL;DR: A novel algorithm is proposed that achieves synchronization or balancing in phase models under mild connectedness assumptions on the (possibly time-varying and unidirectional) communication graphs on the N-torus.

TL;DR: The proposed iterative method enables simultaneous estimation of both the linear block parameters and all the parameters characterizing the nonlinearity, i.e., the slopes of linear segments and the constants determining the partition of domain.

TL;DR: This paper considers a formation of three point agents moving in the plane, where the agents have a cyclic ordering with each one required to maintain a nominated distance from its neighbour; further, each agent is allowed to determine its movement strategy using local knowledge only of the direction of its neighbour, and the current and desired distance fromits neighbour.

TL;DR: This paper solves the problem of reduced-order H ∞ filtering for singular systems by designing linear filters with a specified order lower than the given system such that the filtering error dynamic system is regular, impulse-free, stable, and satisfies a prescribed H∞ performance level.

TL;DR: This paper identifies a class of nonlinear passive systems of the form f = f +gu, y = h(x) whose incremental model is also passive and proves that general nonlinear RLC circuits with convex and proper electric and magnetic energy functions and passive resistors with monotonic characteristic functions are globally stabilizable with linear PI control.

TL;DR: Methods to stabilize a class of motion patterns for unit speed particles in the plane by measuring the relative distance between each pair of particles along the curve using the relative arc-length between the particles.

TL;DR: This work explicitly design a universal output feedback controller which globally regulates all the states of the uncertain system while maintaining global boundedness of the closed-loop system.

TL;DR: An implicit Lyapunov-based approach is proposed for generating trajectories of a finite dimensional controlled quantum system and the performance of such feedback laws for the open-loop control of a test case considered by chemists is illustrated.

TL;DR: In this paper, a delay-dependent sufficient condition is presented, which guarantees the existence of a linear filter ensuring that the filtering error system is stochastically asymptotically stable and its L 2 − L ∞ performance satisfies a prescribed level.

TL;DR: A new version of the small-gain theorem for nonlinear finite dimensional systems provides conditions for global asymptotic stability under relaxed assumptions, in particular the two interconnected subsystems need not be Input-to-State stable in open loop.

TL;DR: The problem of robust stabilization of real polytopic linear discrete-time periodic systems via a periodic state-feedback control law is tackled here, along with H2 performance optimization, and an extended sufficient condition of robust H2 stabilization is proposed.

TL;DR: The proposed design methodology, termed "positive /spl mu/-modification", protects the control law from actuator position saturation and is Lyapunov based and ensures global asymptotic tracking for open-loop stable systems.

TL;DR: This paper proposes a new approach to estimate the domain of attraction of equilibrium points of polynomial systems via the union of a continuous family of Lyapunov estimates, obtained through a convex LMI optimization by deriving a stability condition which takes simultaneously into account all considered LyAPunov functions.

TL;DR: The paper discusses the use of a simple position control system approach to improve the performance of lightly damped dynamic systems using a delayed position feedback signal to actively control the vibrations of flexible structures.

TL;DR: The “mixed” small gain and passivity property is described mathematically using the notion of dissipativity of systems, and finite-gain stability of the interconnection is proven via a stability result for dissipative interconnected systems.

TL;DR: A new algorithm is presented for efficiently calculating pairs of indistinguishable states in finite-state automata with partially observable transitions that obtains all indistinguishable state pairs in polynomial time in the number of states and events in the system.

TL;DR: This work considers a general high-gain scaling technique for global control of strict-feedback-like systems and the application of the general scaling technique to the design of a high- Gain observer enables relaxation of the assumption in earlier papers on cascading dominance of upper diagonal terms.

TL;DR: A new systematic framework for nonlinear observer design that allows the concurrent estimation of the process state variables, together with key unknown process or sensor disturbances is proposed and converges to zero with assignable rates.

TL;DR: This paper presents a set of inequalitytype conditions as necessary and sufficient conditions for controllability of linear complementarity systems, of Popov–Belevitch–Hautus type in nature.

TL;DR: The equivalence between dynamic programming inequalities and Hamilton–Jacobi–Bellman (HJB) inequalities for proximal sub (super) gradients is proven and it is shown that the value function is a Dini solution of the HJB equation.

TL;DR: The new bounds show that the right-hand side B can greatly influence the eigenvalue decay rate of the solution, suggesting a new choice of the ADI-parameters for the iterative solution.

TL;DR: A new Lyapunov function is used to obtain a global uniform asymptotical stability of some perturbed systems.

TL;DR: A language property called delay observability is presented which assures no confliction in making a decision for legal controllable events under partial observation and delay communication in a discrete event system with communication delays and partial observations.

TL;DR: Research results show that two unstable systems can generate a stable system through some effective cooperations through the use of parameter-dependent Lyapunov function method developed for the study of robust stability.