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检索条件"主题词=distributed parameter systems"

共 2677 条记录，以下是171-180 订阅

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Thermodynamics Analysis of the distributed parameter Model of Counterflow Heat Exchanger 22

Thermodynamics Analysis of the Distributed Parameter Model o...

引用

22nd World Congress of the International Federation of Automatic Control (IFAC)

作者： Kazaku, Jacques Kadima Dochain, Denis Kahilu, Moise Mukepe Kasongo, Jimmy Kalenga Kaunde UCLouvain Dept Engn Math ICTEAM 4-6 Ave G Lemaitre B-1348 Louvain La Neuve Belgium Univ Lubumbashi Dept Elect & Mine Route Kasapa Lubumbashi 1825 DEM REP CONGO

ISBN: (纸本)9781713872344

In this paper we are interested in the thermodynamic analysis of a counterflow heat exchanger, when the dynamics are described by two hyperbolic partial differential equations (PDEs). First from the first and second law of thermodynamics we derive the different models of the heat exchanger. Next we perform an analysis of the equilibrium profiles from a certain condition on the system parameters that guarantees the existence and uniqueness of the solution of the PDEs model. In this analysis we show the importance of the thermal pinch as an energy efficiency factor. Finally we study the passivity and the asymptotic stability of the considered heat exchanger essentially basing ourselves on the entropy as a storage function, entropy production as a dissipation function, and the thermodynamic availability function as a Lyapunov function. Copyright (c) 2023 The Authors.

关键词： Non-equilibrium thermodynamics heat exchangers distributed parameter systems stability passivity

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Observer-based synchronization of networked distributed parameter systems

Observer-based synchronization of networked distributed para...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Xuyang Lou Qian Ye Baotong Cui School of IoT Engineering Jiangnan University Wuxi China College of Internet of Things Technology Wuxi Institute of Technology Wuxi China Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Jiangnan University Wuxi China

Synchronization in networks of dynamical systems is of importance in biological, chemical, physical and social systems. This paper investigates an observer-based synchronization scheme for a class of networked distributed parameter systems under an abstract framework. As in reality the system states may not be available and different subsystems (agents) share information through a communication network, we estimate the states based on a distributed observer in the case of partial network connectivity. Then a synchronizing controller combining a state feedback is constructed and the well-posedness of the closed-loop system is examined. Numerical simulations are provided to illustrate the effectiveness of the proposed results.

关键词： Synchronization distributed parameter systems Educational institutions Observers Closed loop systems Partial differential equations Neural networks

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On the boundary control of distributed parameter systems by second-order sliding-mode technique. Recent advances and new results

On the boundary control of distributed parameter systems by ...

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International Workshop on Variable Structure systems, VSS

作者： Antonello Baccoli Yury Orlov Alessandro Pisano Elio Usai Department of Electrical and Electronic Engineering University of Cagliari Cagliari Italy CICESE Research Center Ensenada Mexico

The primary concern of the present paper is to give an overview of the available results and methods in the field of second-order sliding mode based boundary control synthesis for uncertain and perturbed distributed parameter systems. We particularly aim at showing how the same basic algorithm (the combined Twisting/PD algorithm) can be applied to solve different problems involving parabolic and hyperbolic-type equations. Then, we deal with a reaction-diffusion process by also providing some novelty in that a destabilizing mixed-type boundary condition, which was not considered in the previous work [14], is taken into account. The effectiveness of the developed controller is supported by simulation results.

关键词： Equations Lyapunov methods distributed parameter systems Process control Aerospace electronics Estimation Mathematical model

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Some results for exponential stability of singular distributed parameter systems

Some results for exponential stability of singular distribut...

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Chinese Control Conference (CCC)

作者： Zhaoqiang Ge Xi'an Jiaotong University Xi'an Shaanxi CN

Exponential stability for the singular distributed parameter systems is discussed in the light of functional analysis and the theory of GE-semigroup in Hilbert space. Some necessary and sufficient conditions concerning the exponential stability of the singular distributed parameter systems are given. The results that we obtained are theoretically important for studying the stability of the singular distributed parameter systems.

关键词： distributed parameter systems Control theory Hilbert space Asymptotic stability Stability analysis Circuit stability

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Model-based Fault Diagnosis and Prediction for a Class of distributed parameter systems

Model-based Fault Diagnosis and Prediction for a Class of Di...

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IEEE Annual Conference on Decision and Control

作者： Jia Cai Hasan Ferdowsi S. Jagannathan Department of Electrical & Computer Engineering Missouri University of Science and Technology Rolla MO 65401 USA

ISBN: (纸本)9781467360890

This paper deals with a novel model-based fault diagnostics and prognostics scheme for distributed parameter systems (DPSs) expressed by a series of partial differential equations (PDEs). Assume that system states are available, an observer is developed based on the PDE model of the system and to compare the detection residual, which is characterized as the different value between the output of the physical system and the observer, with a predefined threshold a fault can be detected. Then, the fault dynamics is approximated and its parameters are learned by a proposed update law using system state information. The parameter magnitudes together with the tuning update law are used to estimate the time to failure (TTF). Two output filters and one input filter are proposed to relax the demand of system state measurable. Finally, the act of the state and filter based diagnosis and prognosis scheme is demonstrated by using a heated rod with an actuator fault.

关键词： distributed parameter systems Fault diagnosis output filter input filter

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Asymptotic estimates for gradient-like distributed parameter systems with periodic nonlinearities

Asymptotic estimates for gradient-like distributed parameter...

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IEEE International Symposium on Intelligent Control (ISIC)

作者： Aleksey Perkin Anton Proskurnikov Vera Smirnova Department of Mathematics St. Petersburg State University of Architecture and Civil Engineering St. Petersburg Russia Research Institute of Technology and Management Institute for Problems of Mechanical Engineering RAS St. Petersburg Russia Department of Mathematics St. Petersburg State University St. Petersburg Russia

Many systems, arising in electrical and electronic engineering may be represented as an interconnection of LTI system and a periodic nonlinear block, as exemplified by phase-locked loops (PLL) and more general systems, based on controlled phase synchronization of several periodic processes (“phase synchronization” systems, or PSS). Typically such systems are featured by the gradient-like behavior, i.e. the system has infinite sequence of equilibria points, and any solution converges to one of them (which may be interpreted as the phase locking). This property however says nothing about the transient behavior of the system, whose important qualitative index is the maximal phase error. Before the phase is locked, the error may increase up to several periods, which phenomenon is known as cycle slipping and was introduced by J. Stoker for the model of mathematical pendulum. Since the cycle slipping is considered to be undesired behavior of PLLs, it is important to find efficient estimates for the number of slipped cycles. In the present paper, we address the problem of cycle-slipping for phase synchronization systems with infinite-dimensional linear part. New effective estimates for a number of slipped cycles are obtained by means of Popov's method of “a priori integral indices”, which was originally developed for proving absolute stability of nonlinear systems.

关键词： Phase locked loops Mathematical model Frequency-domain analysis Educational institutions Synchronization distributed parameter systems Stability analysis

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Disturbance decoupling observers for descriptor distributed parameter systems

Disturbance decoupling observers for descriptor distributed ...

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Chinese Control Conference (CCC)

作者： Kai Li Fei Liu The Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan University Wuxi Jiangsu CN

In this paper, the disturbance decoupling observer design problem for a class of distributed parameter systems with unknown disturbance in the state and in the measurement equations is considered. The disturbance distribution is an unknown signal, but the operator describing the disturbance is known. All operators for systems and observers are bounded operators. A novel disturbance decoupling observers design scheme is proposed via the algebraic transformation. The solvability of the problem hinges on the solution to a corresponding operator equation. The existence conditions for the disturbance decoupling observers are presented. Finally, a numerical example of a 1-D parabolic system is used to illustrate the results of the disturbance decoupling observers..

关键词： Observers Equations Vectors distributed parameter systems Linear systems Splines (mathematics)

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Adaptive output feedback synchronization of networked distributed parameter systems

Adaptive output feedback synchronization of networked distri...

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American Control Conference

作者： Michael A. Demetriou Worcester Polytechnic Institute Dept of Mechanical Engineering Worcester MA 01609 USA

ISBN: (纸本)9781479932757

The optimization and adaptation of the synchronization gains for a class of networked systems is presented in which the state of each of the networked nodes is governed by a distributed parameter system. The design objectives aim at ensuring that all pairwise state differences of the networked systems converge to zero in an appropriate norm and that the states of these systems satisfy the control objective. The proposed static output feedback controllers thus contain a term that addresses the control objective and a consensus term that ensures synchronization. The synchronization gains of the resulting aggregate systems can be viewed as the strengths of the interconnections among the network nodes. Two different optimization schemes for the non-zero entries of the associated graph Laplacian are proposed. An alternate design proposes the on-line adjustment of the entries of the graph Laplacian matrix via an adaptation involving available output signals of the networked systems. The proposed results are demonstrated by a numerical example for a 1D partial differential equation.

关键词： distributed parameter systems entry feedback controller Output feedback Laplacian operator numerical example Ensure effective output

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Robust sampled-data control of a class of distributed parameter systems using mobile actuator-sensor networks

Robust sampled-data control of a class of distributed parame...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Xueming Qian Baotong Cui School of Internet of Things Jiangnan University Wuxi Jiangsu China

This paper study the sampled-data control problem of a class of distributed parameter systems. A novel sampled-data control scheme is presented using mobile actuator-sensor networks. By utilizing a Lyapunov functional which depend on spatial parameter, a controller combine to decentralized static output feedback control scheme and the point measurement of the mobile sensor is designed to derive several sufficient criteria ensuring the distributed parameter systems to be globally asymptotically stable. The criteria are given in the form of linear operator inequalities and the velocity law of each mobile actuator/sensor. It is also shown that static sampled-data control of distributed parameter systems is just a special case of our main results. A numerical simulations illustrate the effectiveness of the proposed control scheme in enhancing system performance.

关键词： Mobile communication Actuators Mobile computing distributed parameter systems Graphical models Distribution functions Output feedback

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Feedback control of linear distributed parameter systems via adaptive model reduction in the presence of device network communication constraints

Feedback control of linear distributed parameter systems via...

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American Control Conference

作者： Davood Babaei Pourkargar Antonios Armaou Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA

ISBN: (纸本)9781479932757

We focus on model-based networked control of general linear dissipative distributed parameter systems, the infinite dimensional representation of which can be decomposed to finite-dimensional slow and infinite-dimensional fast and stable subsystems. The controller synthesis of such systems is addressed using adaptive proper orthogonal decomposition (APOD). Specifically, APOD is used to recursively construct locally accurate low dimensional reduced order models (ROMs). The ROM is included in the control structure to reduce the frequency of spatially distributed sensor measurements over the network by suspending communication. The main objective of the current work is to identify a criterion for minimizing communication bandwidth (snapshots transfer rate) from the distributed sensors to the control structure considering closed-loop stability. The proposed approach is successfully used to regulate the thermal dynamics in a tubular chemical reactor.

关键词： Eigenvalues and eigenfunctions Read only memory distributed parameter systems Reduced order systems Frequency measurement Process control Stability analysis

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