CAP Seminar Series


Alessandro Macchelli

Title: Control design for linear boundary control systems in port-Hamiltonian form

SpeakerAlessandro Macchelli, University of Bologna

Venue: EEE 1109B

Date and Time: Wednesday 15 May 2019, 14:00-15:00

AbstractThe aim of this talk is to present different control synthesis methodologies for a class of linear boundary control systems (BCS) in port-Hamiltonian form that are dissipative with respect to a quadratic supply rate, being the total energy the storage function. At first, general conditions that a linear regulator has to satisfy to a have a well-posed and exponentially stable closed-loop system are discussed. Such methodology is illustrated with reference to two specific stabilisation scenarios, namely when the (distributed parameter) plant is in impedance or in scattering form. Nevertheless, these techniques can be employed in the analysis of more general systems that are described by coupled partial and ordinary differential equations. As a second contribution, when the BCS is passive, it is shown how to design a state-feedback control action that is able to shape the open-loop energy-function (energy shaping) in order to obtain desired performances in closed-loop, e.g. to move the minimum of the energy at a desired equilibrium configuration. By adding dissipation thanks to a further control loop (damping injection), asymptotic stability is achieved. Finally, by relying on the results presented in the first part of the talk, it is shown how to implement a control action based on the energy-shaping paradigm but now also able to guarantee exponential stability. The key point is the addition of an integral term in the damping injection contribution. In this way, a major limitation of standard energy-shaping plus damping injection control laws applied to linear port-Hamiltonian BCS , namely the fact that only asymptotic convergence is assured, has been removed.

BiographyAlessandro Macchelli took the Laurea Degree cum laude and the PhD in Automatic Control and Operational Research at the University of Bologna (DEIS) in 2000 and 2003. He has been visiting scholar (sponsored by NACO2 ) at the University of Twente in 2001 and Post-Doc in 2003. In 2004, he got a Post-Doc position at the University of Bologna (DEIS), and in 2005, he joined DEIS as assistant professor in robotics and industrial automation. After 2005, he has been visiting professor at the Tongji University in Shanghai, at the Institute of Automatic Control and Control Systems Technology of the Johannes Kepler University Linz, at the National Engineering Institute in Mechanics and Micro–Technologies (FEMTO-ST/AS2M) in Besaçon, and at the Institute of Cyber-Systems & Control of the Zhejiang University in Hangzhou. His research activity is focused on port-Hamiltonian systems, with particular emphasis on modelling, simulation and control of distributed parameter systems, and applications of the port-Hamiltonian framework to robotics and mechatronics. He is currently author of more than 50 journal and conference papers on these topics.

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Title: Battling the Extreme with Resilient Power Grids: How ready are we?

SpeakerDr Mathaios Panteli, The University of Manchester

Venue: EEE 1109B

Date and Time: Tuesday 11 June 2019, 14:00-15:00

AbstractRecent climate-change driven extreme events and natural hazards, such as severe storms, hurricanes and earthquakes, have placed resilience in the spotlight of key stakeholders and policy-makers in the power system community worldwide. There is a growing concern over the critical need to address and boost resilience to such disastrous events, which are referred to as black sky hazards. This talk will share experiences and applications from relevant national and international research projects in the area of resilient power systems planning and operation. It will cover conceptual frameworks for better understanding the multi-faceted concept of resilience and advanced quantitative techniques based on specifically designed resilience metric systems, as well as risk-based and integrated planning approaches to support the decision-making on designing resilient power systems. The talk will conclude with insights on ongoing national and international relevant efforts (including activities in international professional bodies, such as IEEE and CIGRE ), further highlighting the recognition by the global power system community of the pressing need to move towards a more resilience-oriented engineering.

BiographyDr Mathaios Panteli is a Lecturer in Power Systems in the Power and Energy Division, School of Electrical and Electronic Engineering, The University of Manchester, UK. His main research interests focus on reliability, risk and resilience of future, low-carbon power networks, system integration of distributed energy resources and integrated modelling of co-dependent critical infrastructures. He has an extensive publication record in these areas and has been invited to give numerous seminars and talks in world-leading Universities, conferences and organizations. He currently leads/is involved in research projects of total worth over £10m in the areas of resilient and sustainable power systems planning and operation. Dr Panteli is an IEEE Senior Member, the co-chair and technical coordinator of the CIGRE working group C4.47 “Power System Resilience” and an invited member in multiple working groups in IEEE and CIRED . Notably, he is also the recipient of the 2018 Newton Prize, an annual prize awarded by Newton Fund, UK, to research projects between UK and Newton countries that demonstrated excellence in innovation, research and impact.

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Past talks of CAP Seminar Series