Showing papers in "European Journal of Control in 2004"

TL;DR: The fundamental theory, main new results and practical applications of this control system design approach are reviewed as well as to discuss the current open problems and future directions.

TL;DR: This paper provides necessary and sufficient conditions for the existence of such a control redesign for a particular choice of the closed-loop energy function, and shows that the aforementioned redesign is still useful in order to reduce the mathematical complexity in exponential and asymptotic stability analysis.

TL;DR: Using a coordinate transformation on the momentum variables, the kinetic energy of the system is split in a desired and an undesired part, and an controller is designed as an interconnection of port-Hamiltonian subsystems in such a way that asymptotic convergence to the desired curve is obtained.

TL;DR: A controller that asymptotically stabilizes the inverted pendulum on a cart at a specific cart position for the conservative dynamic model and develops conditions for asymPTotic stability in the presence of linear damping.

TL;DR: A small-gain theorem, which makes use of the notion of non-uniform in time IOS property, is presented.

TL;DR: Substantial conditions are given on both output sampling time and system input, which allow to preserve the observability of the system and consequently, guarantee the convergence of the continuous- discrete time observer synthesized in this paper.

TL;DR: In this article, a spectral quadratic semidefinite programming (SDP) method was proposed for the iterative resolution of fixed-order H 2 and H ∞ design problems.

TL;DR: A general descriptor-type LFT representation of rational parametric matrices that allows to represent arbitrary rationally dependent multivariate functions in LFT-form is introduced.

TL;DR: In this paper a combined control structure to decrease the rollover risk of heavy vehicles is developed, active anti-roll bars are combined with an active brake control.

TL;DR: This paper deals with the problems of robust stabilization and robust H ∞ control for a class of Takagi–Sugeno fuzzy neutral delay systems with norm-bounded timevarying parameter uncertainties with attention focused on the design of a fuzzy state feedback controller implemented by utilizing the so-called parallel distributed compensation scheme.

TL;DR: It is discussed how optimal steady state performance can be guaranteed by modifying an internal model control structure with a non-linear element by applying unconstrained control design techniques to the constrained control problem.

TL;DR: A new nonlinear controller for a general class of hydraulic piston actuators is derived, founded on an energy-based formulation of the mathematical model, taking into account the fundamental relations of an isentropic fluid.

TL;DR: A structure exploiting numerical algorithm to compute the periodic controllability form by employing exclusively orthogonal similarity transformations is proposed, which fulfils all requirements for a satisfactory algorithm for periodic systems.

TL;DR: This paper is devoted to a unified approach to trajectory tracking control of nonholonomic portcontrolled Hamiltonian systems via generalized canonical transformations by constructing an error system, which describes the dynamics of the tracking error, by a passive port-controlled Hamiltonians.

TL;DR: A state feedback controller that achieves global asymptotic stabilization of a nonlinear Ginzburg-Landau model of vortex shedding from bluff bodies with the potential of using low order discretizations for the control design, and thereby reducing the number of sensors needed for implementation.

TL;DR: In this paper, a geometric derivation of numerical integrators for nonholonomic systems and optimal control problems is obtained based on the classical technique of generating functions adapted to the special features of non-holonomic system and optimization problems.

TL;DR: This paper provides algorithms that, based on a particular decomposition of the set of forbidden configurations, solve the control problem locally and produce a global supervisor ensuring the desired property and applies these results to the case of hierarchical FSMs.

TL;DR: Two versions of continuous-time feedback nonlinear predictive control laws with a fixed end point prediction and a finite horizon prediction are presented andSimulations show that the proposed controllers are suitable for high dynamic performance applications.

TL;DR: The feedforward sensitivities are defined, Ss and Sff, r, as measures for the reduction in the output error obtained by the feedforward control, and μ-optimal feedforward controllers are designed.

TL;DR: This work presents the formal approach for identifying continuous transfer functions of the vertical dynamics of a high-speed ship as a nonlinear optimization problem with linear constraints from the Matlab toolbox.

TL;DR: It is shown that the method generates a monotonically increasing sequence that converges to the minimal solution of the original equation whenever it exists, and the convergence is unconditionally ensured.

TL;DR: The main objective of the’Satellite UltraQuiet Isolation Technology Experiment’ is to attenuate the vibration in the braodband up to 100 Hz, and at 5-, 25-, and 100-Hz corner frequencies in a six-degree-of-freedom hexapod system mounted on a satellite.

TL;DR: A new algorithm is presented to solve both the finiteHorizon time-varying and infinite-horizon timeinvariant discrete-time optimal reduced-order linear quadratic Gaussian (LQG) problem and it is illustrated how UDU factorisation may increase both the numerical efficiency and accuracy of the recursions.

TL;DR: This paper surveys recent results on kinematic controllability and on oscillatory controls and emphasizes how to translate geometric controllable conditions into algorithms for generating and tracking trajectories.

TL;DR: A minimax LQG control approach is used to synthesize a controller which minimizes noise level at a specified location in an acoustic duct that is robust against uncertainties introduced by neglecting the higher order modes of the duct.

TL;DR: New results of qualitative analysis are presented for a class of dynamical systems whose nonlinearities satisfy certain slope conditions, and some important dynamical aspects that remained hidden for other works relying only on the standard tools of stability analysis are pointed out.

TL;DR: This paper develops a design approach, based on sampled data H ∞ -robust feedback control, for stabilisation of the upright posture of paraplegic persons standing, using a discrete-time formulation.

TL;DR: A new class of Discrete Event Systems endowed with control called DES with flexible marking (DESFM) is proposed, shown to be suitable for systems with abstraction for hierarchical control.

TL;DR: A sufficient condition for the solvability of this problem is obtained and a linear matrix inequality approach is developed and an explicit expression for the construction of a desired output feedback controller is given.

TL;DR: The proposed model is on one side simple enough to be used in real time applications and on the other captures the geometrical features and coupling of a complete spatial geometric unisotropical contact.