Imperial College London

DrGiordanoScarciotti

Faculty of EngineeringDepartment of Electrical and Electronic Engineering

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g.scarciotti

 
 
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1107Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

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33 results found

Di Franco P, Scarciotti G, Astolfi A, A note on the stability of nonlinear differential-algebraic systems, 20th IFAC World Congress

CONFERENCE PAPER

Di Franco P, Scarciotti G, Astolfi A, On the stability of constrained mechanical systems, 56th IEEE Conference on Decision and Control, Publisher: IEEE

CONFERENCE PAPER

Scarciotti G, Astolfi A, Moments at "discontinuous signals" with applications: model reduction for hybrid systems and phasor transform for switching circuits, 22nd International Symposium on Mathematical Theory of Networks and Systems

We provide an overview of the theory and applicationsof the notion of moment at “discontinuous interpolationsignals”, i.e. the moments of a system for input signals thatdo not satisfy a differential equation. After introducing thetheoretical framework, which makes use of an integral matrixequation in place of a Sylvester equation, we discuss someapplications: the model reduction problem for linear systems atdiscontinuous signals, the model reduction problem for hybridsystems and the discontinuous phasor transform for the analysisof circuits powered by discontinuous sources.

CONFERENCE PAPER

Scarciotti G, Teel AR, Model order reduction of stochastic linear systems by moment matching, 20th IFAC World Congress, Publisher: International Federation of Automatic Control

n this paper we characterize the moments of stochastic linear systems by means ofthe solution of a stochastic matrix equation which generalizes the classical Sylvester equation.The solution of the matrix equation is used to define the steady-state response of the systemwhich is then exploited to define a family of stochastic reduced order models. In addition, thenotions of stochastic reduced order model in the mean and stochastic reduced order modelin the variance are introduced. While the determination of a reduced order model based onthe stochastic notion of moment has high computational complexity, stochastic reduced ordermodels in the mean and variance can be determined more easily, yet they preserve some of thestochastic properties of the system to be reduced. The differences between these three familiesof models are illustrated by means of numerical simulations.

CONFERENCE PAPER

Scarciotti G, Teel AR, Model Order Reduction for Stochastic Nonlinear Systems, 56th IEEE Conference on Decision and Control, Publisher: IEEE

CONFERENCE PAPER

Padoan A, Scarciotti G, Astolfi A, 2017, A Geometric Characterisation of the Persistence of Excitation Condition for the Solutions of Autonomous Systems, IEEE Transactions on Automatic Control, Pages: 1-1, ISSN: 0018-9286

JOURNAL ARTICLE

Scarciotti G, 2017, Low Computational Complexity Model Reduction of Power Systems With Preservation of Physical Characteristics, IEEE TRANSACTIONS ON POWER SYSTEMS, Vol: 32, Pages: 743-752, ISSN: 0885-8950

JOURNAL ARTICLE

Scarciotti G, 2017, Discontinuous phasor model of an inductive power transfer system

© 2017 IEEE. Recently, a new discontinuous phasor transform has been introduced. The discontinuous phasor can represent the steady-state quantities of electrical circuits powered by discontinuous sources (e.g. square waves) without approximations. In this paper we provide a discontinuous phasor model of a two-coil inductive power transfer system. We validate this model studying the relation between the maximum power dissipated by the load and the frequency of the square wave. The simulations show that the new model correctly describes the steady-state behavior of the circuit for any quality factor and for any frequency.

CONFERENCE PAPER

Scarciotti G, 2017, Steady-State Matching and Model Reduction for Systems of Differential-Algebraic Equations, IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 62, Pages: 5372-5379, ISSN: 0018-9286

JOURNAL ARTICLE

Scarciotti G, Astolfi A, 2017, Data-driven model reduction by moment matching for linear and nonlinear systems, AUTOMATICA, Vol: 79, Pages: 340-351, ISSN: 0005-1098

JOURNAL ARTICLE

Scarciotti G, Astolfi A, 2017, A review on model reduction by moment matching for nonlinear systems, Lecture Notes in Control and Information Sciences, Pages: 29-52

© 2017, Springer International Publishing AG. The model reduction problem for nonlinear systems and nonlinear time-delay systems based on the steady-state notion of moment is reviewed. We show how this nonlinear description of moment is used to pose and solve the model reduction problem by moment matching for nonlinear systems, to develop a notion of frequency response for nonlinear systems, and to solve model reduction problems in the presence of constraints on the reduced order model. Model reduction of nonlinear time-delay systems is then discussed. Finally, the problem of approximating the moment of nonlinear, possibly time-delay, systems from input/output data is briefly illustrated.

BOOK CHAPTER

Scarciotti G, Astolfi A, 2017, Nonlinear Model Reduction by Moment Matching, FOUNDATIONS AND TRENDS IN SYSTEMS AND CONTROL, Vol: 4, Pages: I-+, ISSN: 2325-6818

JOURNAL ARTICLE

Scarciotti G, Teel AR, Astolfi A, 2017, Model reduction for linear differential inclusions: Moment-set and time-variance, Pages: 3483-3487, ISSN: 0743-1619

© 2017 American Automatic Control Council (AACC). This paper deals with the problem of model reduction by moment matching for linear differential inclusions. The problem is formally formulated and the notions of moment-set and approximate reduced order model are introduced. We first solve the auxiliary problem of model reduction by moment matching for time-varying systems driven by time-varying signal generators. Then, we solve the problem of model reduction for linear differential inclusions. The results are illustrated by means of a numerical example.

CONFERENCE PAPER

Padoan A, Scarciotti G, Astolfi A, 2016, A geometric characterisation of persistently exciting signals generated by continuous-time autonomous systems, 10th IFAC Symposium on Nonlinear Control Systems (NOLCOS), Publisher: ELSEVIER SCIENCE BV, Pages: 826-831, ISSN: 2405-8963

CONFERENCE PAPER

Padoan A, Scarciotti G, Astolfi A, 2016, A geometric characterisation of the persistence of excitation condition for sequences generated by discrete-time autonomous systems, 55th IEEE Conference on Decision and Control (CDC), Publisher: IEEE, Pages: 3843-3847, ISSN: 0743-1546

CONFERENCE PAPER

Scarciotti G, 2016, Moment matching for nonlinear differential-algebraic equations, 55th IEEE Conference on Decision and Control (CDC), Publisher: IEEE, Pages: 7447-7452, ISSN: 0743-1546

CONFERENCE PAPER

Scarciotti G, Astolfi A, 2016, Moment-Based Discontinuous Phasor Transform and its Application to the Steady-State Analysis of Inverters and Wireless Power Transfer Systems, IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol: 31, Pages: 8448-8460, ISSN: 0885-8993

JOURNAL ARTICLE

Scarciotti G, Astolfi A, 2016, A note on the electrical equivalent of the moment theory, American Control Conference (ACC), Publisher: IEEE, Pages: 7462-7465, ISSN: 0743-1619

CONFERENCE PAPER

Scarciotti G, Astolfi A, 2016, Model reduction for hybrid systems with state-dependent jumps, 10th IFAC Symposium on Nonlinear Control Systems (NOLCOS), Publisher: ELSEVIER SCIENCE BV, Pages: 850-855, ISSN: 2405-8963

CONFERENCE PAPER

Scarciotti G, Astolfi A, 2016, Model Reduction of Neutral Linear and Nonlinear Time-Invariant Time-Delay Systems With Discrete and Distributed Delays, IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 61, Pages: 1438-1451, ISSN: 0018-9286

JOURNAL ARTICLE

Scarciotti G, Astolfi A, 2016, Model Reduction by Matching the Steady-State Response of Explicit Signal Generators, IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 61, Pages: 1995-2000, ISSN: 0018-9286

JOURNAL ARTICLE

Scarciotti G, Jiang Z-P, Astolfi A, 2016, Constrained optimal reduced-order models from input/output data, 55th IEEE Conference on Decision and Control (CDC), Publisher: IEEE, Pages: 7453-7458, ISSN: 0743-1546

CONFERENCE PAPER

Scarciotti G, Praly L, Astolfi A, 2016, Invariance-Like Theorems and "lim inf" Convergence Properties, IEEE TRANSACTIONS ON AUTOMATIC CONTROL, Vol: 61, Pages: 648-661, ISSN: 0018-9286

JOURNAL ARTICLE

Scarciotti G, 2015, Model Reduction of Power Systems with Preservation of Slow and Poorly Damped Modes, General Meeting of the IEEE-Power-and-Energy-Society, Publisher: IEEE, ISSN: 1944-9925

CONFERENCE PAPER

Scarciotti G, 2015, Model Reduction by Moment Matching for Linear Singular Systems, 54th IEEE Conference on Decision and Control (CDC), Publisher: IEEE, Pages: 7310-7315

CONFERENCE PAPER

Scarciotti G, Astolfi A, 2015, Characterization of the moments of a linear system driven by explicit signal generators, American Control Conference, Publisher: IEEE, Pages: 589-594, ISSN: 0743-1619

CONFERENCE PAPER

Scarciotti G, Astolfi A, 2015, Model reduction for nonlinear systems and nonlinear time-delay systems from input/output data, 54th IEEE Conference on Decision and Control (CDC), Publisher: IEEE, Pages: 7298-7303

CONFERENCE PAPER

Scarciotti G, Astolfi A, 2015, Model reduction for linear systems and linear time-delay systems from input/output data, European Control Conference (ECC), Publisher: IEEE, Pages: 334-339

CONFERENCE PAPER

Scarciotti G, Astolfi A, 2014, Approximate finite-horizon optimal control for input-affine nonlinear systems with input constraints, Journal of Control and Decision, Vol: 1, Pages: 149-165, ISSN: 2330-7706

JOURNAL ARTICLE

Scarciotti G, Astolfi A, 2014, Model Reduction by Moment Matching for Nonlinear Time-Delay Systems, IEEE 53rd Annual Conference on Decision and Control (CDC), Publisher: IEEE, Pages: 3642-3647

CONFERENCE PAPER

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