| Control engineering is a multidisciplinary subject which is critical to the operation of modern technology and which is nearly invisible in daily life. From atomic force microscopes, through PC disk drives and drive-by-wire engine controls to Boeing 747’s and to space shuttles, multivariable controls underlie many of a the devices which are available in the modern world and without which, they would not function at all. This book is an introduction to the more advanced techniques which are used to design control systems for the devices above and which were developed for this purpose from about 1960.
Modern control theory and in particular state space or state variable methods can be adapted to the description of many systems because they depend strongly on physical modelling and physical intuition. The laws of physics are in the form of continuous differential equations and for this reason, this book concentrates on system descriptions in this form. This means coupled sets of linear or nonlinear differential equations. The physical approach is emphasized in this book because it is most natural for complex systems. It also makes what would ordinarily be a mathematical subject into a physical one which can straightforwardly be understood intuitively and which deals with concepts which engineering and science students are already familiar. In this way it is easier to apply the theory to the understanding and control of ordinary systems. Application engineers, working in industry and very pressed for time, should also find this approach useful for this reason. In particular for those in small and middle sized companies, like most of those in Denmark, this will be the case. |
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