PID Passivity-Based Control of Nonlinear Systems with Applications. Romeo Ortega

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has published five books and more than 350 scientific papers in international journals, with an h‐index of 84. He has supervised more than 35 PhD thesis. He is a Fellow Member of the IEEE since 1999 (Life 2020) and an IFAC Fellow since 2016. He has served as chairman in several IFAC and IEEE committees and participated in various editorial boards of international journals. He is currently Editor in Chief of International Journal of Adaptive Control and Signal Processing and Senior Editor of Asian Journal of Control.

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      He was a postdoctoral fellow at Schneider electric and EECI in Paris France and at the Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier (LIRMM) in 2014 and 2015, respectively. Currently, he is an associate professor and researcher at the Digital Systems Department at the Instituto Tecnológico Autónomo de México (ITAM) and since 2019 he is the Director of undergraduate mechatronics engineering program.

      His research interests are focused on nonlinear and adaptive control, stability analysis and the state estimation problem, with application to mechanical systems, aerial vehicles, mobile robots and multi‐agent systems.

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      Pablo Borja was born in Mexico City, Mexico. He obtained the B.Eng. in Electrical and Electronic Engineering and the M.Eng. from the National Autonomous University of Mexico in 2011 and 2014, respectively, and the PhD in Control Systems from the University Paris Saclay, France, in 2017.

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      Alejandro Donaire received the Electronic Engineering and PhD degrees in 2003 and 2009, respectively, from the National University of Rosario, Argentina. His work was supported by the Argentine National Council of Scientific and Technical Research, CONICET. In 2009, he joined the Centre for Complex Dynamic Systems and Control at The University of Newcastle, Australia, and in 2011, he received the Postdoctoral Research Fellowship of the University of Newcastle, Australia. From 2015 to March 2017 he was with the PRISMA Lab at the University of Naples Federico II, and from 2017 to 2019 with the Institute for Future Environments, School of Electrical Engineering and Computer Science, Queensland University of Technology, Australia. In 2019, he joined the School of Engineering, The University of Newcastle, Australia, where he conducts his academic activities. His research interests include nonlinear and energy‐based control theory with application to electrical drives, multi‐agent systems, robotics, smart micro‐grids networks, marine and aerospace mechatronics, and power systems.

      It is interesting to quote a 2018 report of Karl Åstrom (Åstrom, 2018) where he points out the following:

       In spite of the predictions that other control techniques, e.g. model predictive control (MPC), will make, the PID obsolete, more than 90% of industrial controllers are still implemented based around PID algorithms.

       In a report of Bill Bialkowski of the Canadian consulting company Entech, it is indicated that out of 3000–5000 control loops in the paper mill industry, 97% use proportional‐derivative (PI) and the remaining 3% are MPC, adaptive, etc.

       In the same report it is indicated that, out of the 50% of the PIDs that do not work well, 30% are due to bad tuning.

      The present book is devoted to the study of PID passivity‐based control (PBC), which provides a solution to the tuning problem of PID control of nonlinear systems. The underlying principle for the operation of PID‐PBC is, as the name indicates, the property of passivity, which is a fundamental property of dynamical systems. One of the foundational results of control theory is the passivity theorem (Desoer and Vidyasagar, 2009; Khalil, 2002; van der Schaft, 2016), which states that the feedback interconnection of two passive systems ensures convergence of the output to zero and stability (in the script upper L 2 sense) of the closed‐loop. On the other hand, it is well‐known (van der Schaft, 2016) that PID controllers are (output strictly) passive systems – for all positive PID gains. Therefore, wrapping the PID around a passive output yields a stable system for all PID gains. Clearly, this situation simplifies the gain‐tuning task, since the designer is left with the only task of selecting, among all positive gains, those that ensure the best transient performance.

      PID‐PBCs have been successfully applied to a wide class of physical systems, see e.g. Aranovskiy et al. (2016), Castaños et al. (2009), Cisneros et al. (2015, 2016), De Persis and Monshizadeh (2017), Hernández‐Gómez et al. (2010), Meza et al. (2012), Romero et al. (2018), Sanders and Verghese (1992), and Talj et al. (2010). However, their application has mainly been restricted to academic circles. It is the authors' belief that PID‐PBCs have an enormous potential in engineering practice and should be promoted among practitioners. The main objective of the book is then to give prospective designers of PID‐PBCs the tools to successfully use this technique in their practical applications. Toward this end, we provide a basic introduction to the theoretical foundations of the topic, keeping the mathematical level at the strict minimum necessary to cover the material in a rigorous way, but at the same time to make it accessible to an audience more interested in its practical application. To fulfill this objective, we have skipped technically involved theoretical proofs – referring the interested reader to their adequate source – and we have included a large number of practical examples.

      We are aware that aiming at penetrating current engineering practice is

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