In this paper the regulation problem of linear discrete-time systems with uncertain parameters under state and control constraints is studied. In the frrst part of the paper, two theorems concerning necessary and suff...
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In this paper the regulation problem of linear discrete-time systems with uncertain parameters under state and control constraints is studied. In the frrst part of the paper, two theorems concerning necessary and sufficient conditions for the existence of a solution to this problem are presented. Due to the constructive form of the proof of these theorems, these results can be used for the derivation of a control law transferring to the origin any state belonging to a given set of initial states while respecting the state and controI constraints. So, a design technique is developed. By this technique the initial problem. is reduced to simple mathematical programming problems. Dans cet article, on étudie le problème de regulation des systémes linéaires discrets avec des parametres imprécis et contraintes sur la commande et l'état. Dans la première partie de l'article, on présente deux théorèmes concemant les conditions nécessaires et suffisantes pour l'existence d'une solution a ce problème. Grace au caraètere constructive de la démonstration de ces théoremes, ces resultats peuvent etre utilises pour la dérivation d'une lois de commande permettant le transf ère a l'origine de tous les états appartennant à un ensemble donne des états initiaux, sans violer les contraintes sur la commande et l'état.
This paper describes the approach to information sharing being adopted by Synapses, a pan-European project funded under the EU Health Telematics Programme. The emphasis in Synapses is on developing standards to enable...
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This paper describes the approach to information sharing being adopted by Synapses, a pan-European project funded under the EU Health Telematics Programme. The emphasis in Synapses is on developing standards to enable sharing, in whole or in part, of electronic healthcare records between distributed healthcare providers and institutions. The current technological solutions available for data sharing, including federated database systems, gateways, data warehousing, messaging and the web are insufficient on their own to meet the needs of Synapses. Thus in Synapses several different, but complementary technologies are merged in an open, distributed object-oriented environment. Furthermore, in order to safeguard the legal, ethical and clinical integrity of the record, it is essential not only to preserve the meaning of the data being transferred, but also its context and structure. Synapses solves this problem by defining a standard architecture for the federated electronic healthcare record.
The property of external controllability has been well studied for 1D and 2D systems. We provide a nontrivial generalization of earlier work to the nD case. We also provide a simple algebraic characterization of contr...
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The property of external controllability has been well studied for 1D and 2D systems. We provide a nontrivial generalization of earlier work to the nD case. We also provide a simple algebraic characterization of controllability.
In this paper we consider the fault isolation problem for the linear time varying systems. Our approach is based on characterization of the observability of LTV systems by Kalman's rank condition, which permits us...
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ISBN:
(纸本)9783952426906
In this paper we consider the fault isolation problem for the linear time varying systems. Our approach is based on characterization of the observability of LTV systems by Kalman's rank condition, which permits us to design fault detection filters, feeding also the derivatives of the inputs and the outputs. We prove, using a computable method, that the isolation problem can be solved by generalized Luenberger's observer if and only if the detectability and the weak separability of fault signatures holds.
Two major improvements, controlled fan-in and automated initial-circuit production, were made over the random generator of benchmark circuits presented at DAC'94. This is an important progress towards our goal of ...
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Two major improvements, controlled fan-in and automated initial-circuit production, were made over the random generator of benchmark circuits presented at DAC'94. This is an important progress towards our goal of random benchmarking: more general and secure testing, increasing the naturality of random circuits by controlling their attributes, and obtaining test results by which the difference of performances under evaluation can be made clear.
For the well known ball-and-beam system, we design a new saturation control law, which employs state-dependent saturation levels and guarantees global asymptotic stability, not achieved with previous designs.
For the well known ball-and-beam system, we design a new saturation control law, which employs state-dependent saturation levels and guarantees global asymptotic stability, not achieved with previous designs.
This paper presents a PD controller for robot manipulators simultaneously considering joint flexibility, actuators dynamics as well as friction. The convergence analysis of the proposed PD controller is carried out us...
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This paper presents a PD controller for robot manipulators simultaneously considering joint flexibility, actuators dynamics as well as friction. The convergence analysis of the proposed PD controller is carried out using passivity. Global convergence to a desired fixed angular position is proved only using position and velocity measurements.
Trajectory control for a reusable launch vehicle (RLV) is considered in the reentry and launch modes. Decoupling sliding mode controllers are designed to achieve the asymptotic tracking of Euler angles' profiles u...
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Trajectory control for a reusable launch vehicle (RLV) is considered in the reentry and launch modes. Decoupling sliding mode controllers are designed to achieve the asymptotic tracking of Euler angles' profiles upon plant uncertainties and external disturbances. Effectiveness of the sliding mode controllers is confirmed by simulations of trajectory tracking in a trimmed condition for the WB001 RLV studied at NASA Marshall Space Flight Center.
Trajectory control for a reusable launch vehicle (RLV) is considered for two operational modes: reentry and launch modes are considered. Decentralized sliding mode controllers are designed to achieve the de-coupled as...
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Trajectory control for a reusable launch vehicle (RLV) is considered for two operational modes: reentry and launch modes are considered. Decentralized sliding mode controllers are designed to achieve the de-coupled asymptotic tracking of Euler angles' profiles upon plant uncertainties and external disturbances. Two sliding mode control strategies are investigated: direct Euler angles' profiles tracking and angular rates tracking in combination with a coordinated turn inversion. Effectiveness of the sliding mode controllers is confirmed by simulations of a trajectory tracking for the WB001 RLV studied at NASA Marshall Space Flight Center.
The generation of rule-bases in conventional fuzzy logic controllers can be a difficult and time consuming problem for implementation by process operators thus affecting their wider applicability. A Self-Learning Fuzz...
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The generation of rule-bases in conventional fuzzy logic controllers can be a difficult and time consuming problem for implementation by process operators thus affecting their wider applicability. A Self-Learning Fuzzy Logic control (SLFLC) offers a possible solution. A performance study is therefore presented to evaluate the performance of a proposed SLFLC by analysing its transient performance for a variety of on-line tests and examining its ability to generate a consistent set of rules, based on a predetermined criteria. The results presented show that even with a limited knowledge of the process, the self-learning procedure is able to develop a suitable set of rules and produce a satisfactory process performance with some degree of robustness and repeatability when applied to a non-linear single-input single-output (SISO) or multi-input multi-output (MIMO) laboratory liquid-level processes.
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