IEEE Transactions on Automatic Control

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ISSN / EISSN : 0018-9286 / 1558-2523
Published by: IEEE (10.1109)
Total articles ≅ 17,153
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IEEE Transactions on Automatic Control, Volume 66, pp 3892-3892; doi:10.1109/tac.2021.3094038

Abstract:
Prospective authors are requested to submit new, unpublished manuscripts for inclusion in the upcoming event described in this call for papers.
IEEE Transactions on Automatic Control, Volume 66; doi:10.1109/tac.2021.3093959

Abstract:
Presents the table of contents for this issue of the publication.
IEEE Transactions on Automatic Control, pp 1-1; doi:10.1109/tac.2021.3100289

Abstract:
Exponential stabilization is studied for reaction-diffusion systems (RDSs) with a reaction term satisfying the global Lipchitz condition by means of intermittent boundary control. First, a state-dependent intermittent boundary controller is designed when system states are available. By employing the spatial integral functional method and Poincares inequality, a sufficient condition ensuring exponential stability of RDSs is presented. Then, an observer is presented to estimate the system states based on boundary output, when the information of system states is not fully accessible. An observer-based intermittent boundary controller is provided aiming to stabilize the considered RDSs based on the designed observer. Furthermore, a robust observer-based intermittent boundary controller is proposed to ensure the exponential stability for RDSs with uncertainties. Examples are given to illustrate the effectiveness of obtained theoretical results.
IEEE Transactions on Automatic Control, Volume 66; doi:10.1109/tac.2021.3093961

Abstract:
Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.
IEEE Transactions on Automatic Control, pp 1-1; doi:10.1109/tac.2021.3100553

Abstract:
This article considers a discrete-time robust optimal control problem on matrix Lie groups. The underlying system is assumed to be perturbed by exogenous unmeasured bounded disturbances, and the control problem is posed as a min-max optimal control wherein the disturbance is the adversary and tries to maximise a cost that the control tries to minimise. Assuming the existence of a saddle point in the problem, we present a version of the Pontryagin maximum principle (PMP) that encapsulates first-order necessary conditions that the optimal control and disturbance trajectories must satisfy. This PMP features a saddle point condition on the Hamiltonian and a set of backward difference equations for the adjoint dynamics. We also present a special case of our result on Euclidean spaces. We conclude with applying the PMP to robust version of single axis rotation of a rigid body.
IEEE Transactions on Automatic Control, Volume 66; doi:10.1109/tac.2021.3093963

Abstract:
Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.
IEEE Transactions on Automatic Control, pp 1-1; doi:10.1109/tac.2021.3099446

Abstract:
The proposed simple modification of discrete homogeneous sliding-mode-based differentiators improves the accuracy and significantly lowers the output chattering in the absence of noises, while preserving the differentiation accuracy in their presence. The approach is extended to general discretely sampled homogeneous discontinuous systems. Numeric experiments confirm the theoretical results.
IEEE Transactions on Automatic Control, pp 1-1; doi:10.1109/tac.2021.3099453

Abstract:
We provide several characterizations of integral input-to-state stability (iISS) of time-delay systems. These characterizations differ in the way the considered Lyapunov-Krasovskii functionals (LKF) dissipate along the solutions of the system. This dissipation can involve the LKF itself, as in existing iISS characterizations, but can alternatively involve the instantaneous value of the solution's norm (point-wise dissipation), the supremum norm of the state history (history-wise dissipation) or a mix of the two ( $\mathcal{KL}$ dissipation). We show that all of them guarantee iISS. By relying on a recent converse result by Y. Lin \& Y. Wang, we show that most of them are also necessary for iISS. These relaxed dissipation rates simplify the iISS analysis of time-delay systems and contribute to uniforming iISS theory with that of input-free systems. Proofs rely on several results for time-delay systems that may be of interest on their own, including a novel characterization of global asymptotic stability and the fact that iISS is equivalent to global asymptotic stability of the input-free system plus a uniform bounded energy-bounded state property.
IEEE Transactions on Automatic Control, pp 1-1; doi:10.1109/tac.2021.3099457

Abstract:
This paper presents strategies for state-feedback control law design of non-linear control laws with saturating inputs. The input constraints are handled by considering a generalized local sector inequality allowing to study non-symmetric saturation bounds. A numerical formulation is presented for polynomial systems and is based on the solution of Lyapunov inequalities with sum-of-squares programming. Numerical results illustrate the proposed method.
IEEE Transactions on Automatic Control, pp 1-1; doi:10.1109/tac.2021.3099449

Abstract:
This work addresses the problem of robust output feedback model predictive control for discrete-time, constrained, linear parameter-varying systems subject to (bounded) state and measurement disturbances. The vector of scheduling parameters is assumed to be an unmeasurable signal taking values in a given compact set. The proposed controller incorporates an interval observer, that uses the available measurement to update the set-membership estimation of the states, and an interval predictor, used in the prediction step of the MPC algorithm. The resulting MPC scheme offers guarantees on recursive feasibility, constraint satisfaction, and input-to-state stability in the terminal set. Furthermore, this novel algorithm shows low computation complexity and ease of implementation (similar to conventional MPC schemes).
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