Wolfgang Borutzky is a professor for Modelling and Simulation of Engineering Systems retired from Bonn-Rhein-Sieg University of Applied Sciences, Germany. He obtained his University Diploma Degree in Mathematics and his Doctoral Degree in Mechanical Engineering, both from the Technical University of Braunschweig, Germany. He held an honorary position as Associate Professor of Electrical Engineering and Information Technology at the University of Dubrovnik, Croatia. Dr. Borutzky has published in the proceedings of many peer-reviewed international conferences on Modelling and Simulation and in refereed scientific journals. In 2019 he received the best paper award of the 12th International Conference on Integrated Modelling and Analysis in Applied Control and Automation (IMAACA 2019) in Lisbon, Portugal, which is part of the annual International Multidisciplinary Modelling & Simulation Multiconference (I3M). He is the author of several Springer books on Bond Graph modelling, on control engineering, and on fault diagnosis and failure prognosis, has edited some Springer compilation texts and was also the guest editor of two special journal issues on Bond Graph modelling

Introduction.- Objectives of a control system.- Multiple Input Multiple Output Systems.- Observability.- Controllability.- More on Controllability and Observability.- Stability of Multivariable Systems.- Closed Loop Systems.- State Feedback.- Optimal Control.- Robust Control.- Linear Matrix Inequalities in Control.- Some Useful Mathematical Basics.- Conclusion.