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This chapter introduces the control of the tandem cold metal rolling process. The objectives of the book are presented, with an overview of some of the drawbacks encountered in conventional and advanced systems for control of this process, and how what is presented in the following chapters can overcome them. A brief historical background is given, followed by a short overview of the tandem cold rolling...
This chapter presents a mathematical model suitable for the development of a controller for the tandem cold metal rolling process. A comprehensive model is developed and put into the form of state and output equations. The model is verified by simulation, the results of which are compared to the results of simulations based on a model that is recognized as a benchmark standard for verification.
This chapter presents an overall view of conventional control concepts for the tandem cold metal rolling process to serve as a background for the chapters which follow on advanced control. While the emphasis is on automatic control of strip thickness and interstand tension, the control of the process in the areas of eccentricity compensation, strip flatness, and threading of the mill also is briefly...
This chapter describes some techniques for the advanced control of the tandem cold metal rolling process, and compares them to conventional control methods. The strengths and weaknesses of each of the advanced methods is addressed. In preparation for the discussion on advanced control, the need for advanced control of the process is presented and the linearization of the process model is addressed.
This chapter introduces the augmented state-dependent Riccati equation (SDRE) technique for the advanced control of the tandem cold metal rolling process. The advantages of the SDRE method when compared to conventional control are presented. The characteristics of several other advanced control methods are included for evaluation in light of the augmented SDRE method. A brief introductory discussion...
This chapter provides a brief discussion on variable speed motors and drives for the tandem cold rolling process. The basic characteristics of the cage rotor induction motor and the synchronous motor are presented, along with the voltage converter as a viable modern drive for these machines. Cycloconverters are also addressed as a less preferred drive. Material is included which describes the concepts...
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