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Distributed Optimal Control of Discrete-Time Linear Systems Over Networks

Abstract

In this article, we consider the distributed linear-quadratic-Gaussian optimal control problem for discrete-time systems over networks. In particular, the feedback controller is composed of local control stations which receive some measurement data from the plant process and regulate a portion of the input signal. We provide a solution when the nodes have information on the structural data of the whole network but take local actions, and when only local information on the network is available to the nodes. The proposed solution is arbitrarily close to the optimal centralized one when the intermediate number of consensus steps is sufficiently large.

article Article

date_range 2024

language English

link Link of the paper

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Battilotti Stefano

Cacace Filippo

D'angelo Massimiliano

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Featured Keywords

Sensors

Optimal control

Symmetric matrices

Network systems

Stability analysis

Regulators

Process control

Distributed algorithms/control

networked control systems

optimal control

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Effect of corrosion on flexural strength of reinforced concrete beams with polypropylene fibers

Abstract

An experimental study was performed to investigate the effects of polypropylene fibers on uncorroded and corroded reinforced concrete beams. Three different volume fractions of polypropylene fibers having 0, 0.5, and 1.5%, were tested at four corrosion levels of 0% and approximately 5, 7, and 9%. A full scale of an accelerated corrosion pool was used for the accelerated corrosion process. Reinforced concrete beams were used for an under monotonic bending test. The contribution of the actual corrosion levels of transverse and longitudinal reinforcement bars to the total corrosion levels were obtained from reinforcement bars fully extracted from concrete. Flexural strength, bond-slip, and moment-curvature relationships were examined for uncorroded and corroded reinforced concrete beams. A new model was developed to predict the flexural strength of corroded reinforced concrete beams. The proposed model for predicting the residual flexural strength of corroded beams was compared with test data published in previous studies. Furthermore, a novel model is presented for improved predictions between the actual and theoretically estimated corrosion mass losses, based on Faraday’s law, with the aid of fully extracted reinforcement bars. The model used to predict the flexural strength of corroded reinforced concrete beams with large sizes demonstrated good agreement with current and previously published literature data. In the case of corroded beams comprising differing amounts of polypropylene fibers, the performance of the corroded beams was limited by a fiber volume fraction of 1.5% at low corrosion levels.

article Article

date_range 2018

language English

link Link of the paper

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