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Economic model predictive control with transient average constraints

Economic model predictive control with transient average con...

引用

IEEE Annual Conference on Decision and control

作者： Matthias A. Muller David Angeli Frank Allgower Institute for Systems Theory and Automatic Control University of Stuttgart 70550 Stuttgart Germany Department of Electrical and Electronic Engineering Imperial College London UK

ISBN: (纸本)9781467357159

In this paper, we propose an economic model predictive control algorithm which ensures satisfaction of transient average constraints, i.e., constraints on input and state variables averaged over some finite time period. Compared to asymptotic average constraints, this stricter form might be of independent interest in various applications such as the operation of a chemical reactor, where e.g. the amount of inflow during each one hour period must not exceed a certain value. We show that compared to asymptotic average constraints, a different constraint formulation within the optimization problem solved at each time instant is needed, but that certain results such as closed-loop average performance and convergence established for the former setting can be transferred to the case of transient average constraints.

关键词： Economic Models nonlinear model predictive control Constraint Predictive control State variable INFLUX time periods

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On convergence of averagely constrained economic MPC and necessity of dissipativity for optimal steady-state operation

On convergence of averagely constrained economic MPC and nec...

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American control Conference

ISBN: (纸本)9781479901777

The contribution of this paper is twofold. First, we discuss necessity of a dissipativity condition which was recently used to prove optimal operation of a system at steady-state in an economic MPC framework. We illustrate with several examples that this dissipativity condition is not necessary, but comes close to being so in a certain sense. Second, we provide a Lyapunov-like stability analysis for averagely constrained economic model predictive control. This closes a gap which was left open in a recent paper on economic MPC.

关键词： Steady-state Economics Convergence Cost function Closed loop systems Trajectory Educational institutions

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control synthesis for switched systems with control and state constraints

Control synthesis for switched systems with control and stat...

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Mediterranean Conference on control & Automation

作者： H. N. Nguyen S. Olaru P. O. Gutman Faculty of Civil and Environmental Engineering Technion - Israel Institute of Technology SUPELEC Systems Sciences (E3S) - Automatic Control Department

ISBN: (纸本)9781479909964

In this paper, a new interpolation based control is developed for constrained control of switched linear discrete-time systems. The interpolation is done between a global gain-scheduled vertex controller and a local gain-scheduled stabilizing controller in order to achieve both the large domain of attraction and performance. At each time instant a linear programming problem is solved on-line. Proofs of recursive feasibility and asymptotic stability are given.

关键词： Switched systems Standing Orders region of attraction asymptotic stability region System control linear programming Interpolation controllers synthesis

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Fast Guaranteed Search With Unmanned Aerial Vehicles

Fast Guaranteed Search With Unmanned Aerial Vehicles

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IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Andreas Kolling Alexander Kleiner Piotr Rudol Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD United Kingdom Department of Computer and Information Science Link?ping University 58738 Link?ping Sweden

ISBN: (纸本)9781467363563

In this paper we consider the problem of searching for an arbitrarily smart and fast evader in a large environment with a team of unmanned aerial vehicles (UAVs) while providing guarantees of detection. Our emphasis is on the fast execution of efficient search strategies that minimize the number of UAVs and the search time. We present the first approach for computing fast guaranteed search strategies utilizing additional searchers to speed up the execution time and thereby enabling large scale UAV search. In order to scale to very large environments when using UAVs one would either have to overcome the energy limitations of UAVs or pay the cost of utilizing additional UAVs to speed up the search. Our approach is based on coordinating UAVs on sweep lines, covered by the UAV sensors, that move simultaneously through an environment. We present some simulation results that show a significant reduction in execution time when using multiple UAVs and a demonstration of a real system with three *** 2.0.

关键词： UAVs the fast execution efficient Unmanned Aerial Vehicle execution time search strategies vehicle drone honey bees Searches search time Energy limitation

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Distributed sampling using small unmanned aerial vehicles (UAVs) for scientific missions

Distributed sampling using small unmanned aerial vehicles (U...

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AIAA Infotech at Aerospace (I at A) Conference

作者： Hening, Sebastian Baumgartner, Jeremy Walden, Candace Kirmayer, Russell Teodorescu, Mircea Nguyen, Nhan Ippolito, Corey University of California Santa Cruz Department of Computer Engineering Santa Cruz CA 95064 United States California State University Northridge Department of Computer Science Northridge CA 9133 United States NASA Ames Research Center Control and Evolvable Systems Group Moffett Field CA 94035 United States

The current research represents a first step towards developing a flexible, decentralized network of small and inexpensive, battery powered unmanned aerial vehicles (UAV), which could be used for a variety of scientific missions where measurements from a distributed network of nodes could significantly improve the assessment (e.g. chemical or dust clouds, mapping particulates, chemical content and physical boundaries of a dispersed volcanic plume or vog). Individual UAVs are equipped with on board sensing equipment as well as autopilot and networking nodes for communication between each UAV and the ground station and between UAVs to relaying the data between individual UAVs when lack of direct line of sight prevents communication. The UAVs are built using off the shelf components, which allows rapid replacement of damaged items and lowers significantly the overall price (less than $500 for each instrumented UAV), resulting in a practically disposable fleet of UAVs. In the current paper we use a pair of UAVs and a hardware in the loop computer simulation to test the feasibility of the proposed concept. Each UAV is instrumented with GPS, humidity, temperature and particle sensors as well as XBee network communication links.

关键词： Antennas

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Supervised classification of cerebral blood vessels

Supervised classification of cerebral blood vessels

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2013 2nd International Conference on systems and computer Science, ICSCS 2013

作者： Tache, Irina-Andra Vasseur, Christian Stefanoiu, Dan Vermandel, Maximilien Popescu, Dumitru Department of Automatic Control and Systems Engineering Bucharest Romania University of Science and Technology - Lille LAGIS - Laboratoire d'Automatique Génie Informatique et Signal France INSERM - Institut national de la santé et de la recherche médicale U703 France

ISBN: (纸本)9781479920204

The x-ray angiograms are frequently performed before a cerebral intervention on diseased vessels. The clinicians complain about the difficulty to find small vessels on images with grey level intensities and to differentiate veins from arteries. The main problem in classification resides in finding the right parameters which can completely characterize the patterns of pixels' intensity time course from x-ray projection image series. A basic signal processing was made: a low pass filter for eliminating the undesired information, as long as the application of fast Fourier transform for investigation of signal spectral characteristics. In the presented article, a classification method of blood vessels from the cerebral angiograms based on temporal signals is presented, with a successful rate of identification of arteries of 78% and veins of 65%. © 2013 IEEE.

关键词： Low pass filters

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From non-cooperative to cooperative distributed MPC: A simplicial approximation perspective

From non-cooperative to cooperative distributed MPC: A simpl...

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European control Conference (ECC)

作者： Mathias Bürger Giuseppe Notarstefano Frank Allgöwer Institute for Systems Theory and Automatic Control University of Stuttgart Stuttgart Germany Department of Engineering University of Lecce Via per Monteroni Lecce Italy

ISBN: (纸本)9781479901890

The paper deals with the coordination of dynamical systems by distributed model predictive *** consider a set-up in which the subsystems dynamics are decoupled, while the subsystems outputs are coupled by some constraint. Starting from a well established non-iterative and non-cooperative architecture, we provide a novel interpretation for this non-cooperative scheme as a simplicial approximation of a convex program. Thanks to this novel interpretation, we are able to show why the existing algorithm, while guaranteeing feasibility, fails to compute an optimal solution to the centralized problem. Furthermore, by exploiting the simplicial approximation structure, we are able to propose a novel algorithm. The proposed algorithm inherits all the properties of the existing one, namely little communication, and feasibility. Furthermore, increasing the communication among the subsystems between two control updates improves the performance of the algorithm, regaining in the limit optimality in a cooperative sense.

关键词： Trajectory Approximation methods Approximation algorithms Prediction algorithms Optimization Optimal control Heuristic algorithms

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One-step receding horizon control for LPV systems in presence of constraints

One-step receding horizon control for LPV systems in presenc...

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American control Conference

作者： H. N. Nguyen S. Olaru P. O. Gutman Faculty of Civil and Environmental Engineering Technion - Israel Institute of Technology SUPELEC Systems Sciences (E3S) - Automatic Control Department

ISBN: (纸本)9781479901777

This paper proposes a novel receding horizon based controller for LPV discrete-time systems. The main idea exploited in the proposed algorithm is to use a parameter-dependent Lyapunov function together with an interpolation based control approach. At each time instant, the solution is obtained by means of a quadratic programming algorithm. Proofs of recursive feasibility and asymptotic stability are given.

关键词： Horizon asymptotic stability region Interpolation controllers Constraint quadratic programming Liapunov function instant based Standing Orders algorithms Recursive

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Net present value analysis of the economic production quantity

Net present value analysis of the economic production quanti...

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作者： Disney, Stephen M. Warburton, Roger D. H. Zhong, Qing Chang Logistics Systems Dynamics Group Cardiff Business School Cardiff University Cardiff CF10 3EU United Kingdom Department of Administrative Sciences Metropolitan College Boston University Boston MA 02215 United States Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom

Using Laplace transforms we extend the economic production quantity (EPQ) model by analysing cash flows from a net present value (NPV) viewpoint. We obtain an exact expression for the present value of the cash flows in the EPQ problem. From this, we are able to derive the optimal batch size. We obtain insights into the monotonicity and convexity of the present value of each of the cash flows, and show that there is a unique minimum in the present value of the sum of the cash flows in the extended EPQ model. We also obtain exact point solutions at several values in the parameter space. We compare the exact solution to a Maclaurin series expansion and show that serious errors exist with the first-order approximation when the production rate is close to the demand rate. Finally, we consider an alternative formulation of the EPQ model when the opportunity cost of the inventory investment is made explicit. © The authors 2012. Published by Oxford University Press on behalf of the Institute of Mathematics and its Applications. All rights reserved.

关键词： Laplace transforms

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Rationales of holonic manufacturing systems in leather industry

Rationales of holonic manufacturing systems in leather indus...

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6th International Conference on Industrial Applications of Holonic and Multi-Agent systems, HoloMAS 2013

作者： GuţǍ, Sergiu-Adrian Dumitrache, Ioan McFarlane, Duncan Masood, Tariq Department of Automatic Control and Systems Engineering University Politehnica of Bucharest 313 Spl. Independentei RO-060042 Bucharest Romania Distributed Information and Automation Laboratory Institute for Manufacturing University of Cambridge 17 Charles Babbage Road Cambridge CB3 0FS United Kingdom

ISBN: (纸本)9783642400896

This paper presents an insight into leather manufacturing processes, depicting peculiarities and challenges faced by leather industry. An analysis of this industry reveals the need for a new approach to optimize the productivity of leather processing operations, ensure consistent quality of leather, mitigate the adverse health effects in tannery workers exposed to chemicals and comply with environmental regulation. Holonic manufacturing systems (HMS) paradigm represent a bottom-up distributed approach that provides stability, adaptability, efficient use of resources and a plug and operate functionality to the manufacturing system. A vision of how HMS might operate in a tannery is illustrated presenting the rationales behind its application in this industry. © 2013 Springer-Verlag.

关键词： Environmental regulations

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