IEEE Transactions on Automatic Control

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NP-completeness of sensor selection problems arising in partially observed discrete-event systems
IEEE Transactions on Automatic Control - Tập 47 Số 9 - Trang 1495-1499 - 2002
Tae-Sic Yoo, S. Lafortune
We consider the three properties of diagnosability, normality, and observability of discrete-event systems. In each case, we consider the problem of finding an observable event set with minimum cardinality such that the property under consideration holds. We prove that these search problems are computationally hard by showing that the corresponding decision problems are NP-complete.
#Sensor systems #Discrete event systems #Sensor phenomena and characterization #Automatic control #Observability #Polynomials #Control systems #Computational complexity #Search problems #Gold
Comment on "A new method for the nonlinear transformation of means and covariances in filters and estimators" [with authors' reply]
IEEE Transactions on Automatic Control - Tập 47 Số 8 - Trang 1406-1409 - 2002
T. Lefebvre, H. Bruyninckx, J. De Schuller
The above paper (Julier et al. IEEE Trans. Automat. Contr, vol. 45, pp. 477-82, 2000) generalizes the Kalman filter to nonlinear systems by transforming approximations of the probability distributions through the nonlinear process and measurement functions. This comment derives exactly the same estimator by linearizing the process and measurement functions by a statistical linear regression throug... hiện toàn bộ
#Filters #Nonlinear systems #State estimation #Noise measurement #Time measurement #Covariance matrix #Linear regression #Additive noise #Equations #Probability distribution
Fixed-Time Convergent Distributed Observer Design of Linear Systems: A Kernel-Based Approach
IEEE Transactions on Automatic Control - Tập 68 Số 8 - Trang 4932-4939 - 2023
Pudong Ge, Peng Li, Boli Chen, Fei Teng
The robust distributed state estimation for a class of continuous-time linear time-invariant systems is achieved by a novel kernel-based distributed observer, which, for the first time, ensures fixed-time convergence properties. The communication network between the agents is prescribed by a directed graph in which each node involves a fixed-time convergent estimator. The local observer estimates ... hiện toàn bộ
#Communication network #distributed observer #fixed-time convergence #Volterra operator
Limit cycles with chattering in relay feedback systems
IEEE Transactions on Automatic Control - Tập 47 Số 9 - Trang 1414-1423 - 2002
K.H. Johansson, A.E. Barabanov, K.J. Astrom
Relay feedback has a large variety of applications in control engineering. Several interesting phenomena occur in simple relay systems. In the paper, scalar linear systems with relay feedback are analyzed. It is shown that a limit cycle where part of the limit cycle consists of fast relay switchings can occur. This chattering is analyzed in detail and conditions for approximating it by a sliding m... hiện toàn bộ
#Limit-cycles #Sliding mode control #Control systems #Digital relays #Temperature control #Automatic control #Delta modulation #Nonlinear control systems #Feedback loop #Three-term control
Task-space adaptive control of robotic manipulators with uncertainties in gravity regressor matrix and kinematics
IEEE Transactions on Automatic Control - Tập 47 Số 9 - Trang 1580-1585 - 2002
H. Yazarel, C.C. Cheah
Thus far, most research in adaptive control of robotic manipulators has assumed that models of regressor matrix and kinematics are known exactly. To overcome these drawbacks, we propose in this paper a task-space adaptive law for setpoint control of robots with uncertainties in gravity regressor matrix and kinematics. In addition, we investigate the stability problem when an estimated task-space v... hiện toàn bộ
#Adaptive control #Manipulators #Uncertainty #Gravity #Kinematics #Jacobian matrices #Stability #Programmable control #Robot control #Feedback loop
Input-to-state dynamical stability and its Lyapunov function characterization
IEEE Transactions on Automatic Control - Tập 47 Số 9 - Trang 1499-1504 - 2002
L. Grune
We present a new variant of the input-to-state stability (ISS) property which is based on using a one-dimensional dynamical system for building the class /spl Kscr//spl Lscr/ function for the decay estimate and for describing the influence of the perturbation. We show the relation to the original ISS formulation and describe characterizations by means of suitable Lyapunov functions. As application... hiện toàn bộ
#Stability #Lyapunov method #Polynomials #Automatic control #Communication system control #Observability #Discrete event systems #Sensor systems #Actuators
Polynomial-time verification of diagnosability of partially observed discrete-event systems
IEEE Transactions on Automatic Control - Tập 47 Số 9 - Trang 1491-1495 - 2002
Tae-Sic Yoo, S. Lafortune
The problem of verifying the properties of diagnosability and I-diagnosability is considered. We present new polynomial-time algorithms for deciding diagnosability and I-diagnosability. These algorithms are based on the construction of a nondeterministic automaton called a verifier.
#Polynomials #Discrete event systems #State-space methods #Automata #System testing #Automatic testing #Observability #Energy management
Discontinuous feedback stabilization of minimum-phase semilinear infinite-dimensional systems with application to chemical tubular reactor
IEEE Transactions on Automatic Control - Tập 47 Số 8 - Trang 1293-1304 - 2002
Y. Orlov, D. Dochain
This paper develops discontinuous control methods for minimum-phase semilinear infinite-dimensional systems driven in a Hilbert space. The control algorithms presented ensure asymptotic stability, global or local accordingly, as state feedback or output feedback is available, as well as robustness of the closed-loop system against external disturbances with the a priori known norm bounds. The theo... hiện toàn bộ
#Chemical reactors #Inductors #Temperature #Control systems #Plugs #Hilbert space #Asymptotic stability #State feedback #Output feedback #Robust control
Algorithms for minimization without derivatives
IEEE Transactions on Automatic Control - Tập 19 Số 5 - Trang 632-633 - 1974
Donald G. Anderson
Convex dynamic programming for hybrid systems
IEEE Transactions on Automatic Control - Tập 47 Số 9 - Trang 1536-1540 - 2002
S. Hedlund, A. Rantzer
A classical linear programming approach to optimization of flow or transportation in a discrete graph is extended to hybrid systems. The problem is finite dimensional if the state space is discrete and finite, but becomes infinite dimensional for a continuous or hybrid state space. It is shown how strict lower bounds on the optimal loss function can be computed by gridding the continuous state spa... hiện toàn bộ
#Dynamic programming #Automatic control #Marine vehicles #Adaptive control #Robot control #Mobile robots #Control systems #Cybernetics #Programmable control #Backstepping
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