An engineering handbook that explains all technical aspects of webs, long thin sheets of materials,such as paper, plastic films, foils, and textiles that are wound into rolls, often after being laminated,printed, or coated. Topics covered include: tension control, roller mechanics, drives, brakes, nip control, guides, spreaders, slitters, and more. The book illustrates engineering principles with shop-floorexamples and provides easy-to-understand calculations that control how web systems are designedand operated, and how webs of many different materials can be made to move efficiently over a varietyof rollers. These tools are meant to help industry specialists troubleshoot and correct defects suchas wrinkles, bagginess, curl, and misshapen wound rolls. As part of web handling the book providesextensive details on many roll-to-roll converting operations, such as calendering, coating, laminating,and printing.

An understanding ofthe properties and the handling characteristics of liquids and gases has long been regarded as an essential requirement for most practising engineers. It is therefore not surprising that, over the years, there has been a regular appearance of books dealing with the fundamentals of fluid mechanics, fluid flow, hydraulics and related topics. What is surprising is that there has been no parallel development of the related discipline of Bulk Solids Handling, despite its increasing importance in modern industry across the world. It is only very recently that a structured approach to the teaching, and learning, of the subject has begun to evolve. A reason for the slow emergence of Bulk Solids Handling as an accepted topic of study in academic courses on mechanical, agricultural, chemical, mining and civil engineering is perhaps that the practice is so often taken for granted. Certainly the variety of materials being handled in bulk is almost endless, ranging in size from fine dust to rocks, in value from refuse to gold, and in temperature from deep-frozen peas to near-molten metal.

Written to assist anyone who works with webs, this is a handbook for diagnosing and correcting problems with web handling technology. Covering web handling fundamentals, process related technologies, and troubleshooting, it includes sufficient technical information to identify and correct defects in rolls of film or foil. Readers will appreciate this unbiased look at web handling that also serves as a counterpoint to information from equipment suppliers. Topics include web stability, tension isolation, web spreading, static generation, slitting technology, shear knife technology, trim disposal, wrinkle problems, boundary air entrapment problems, and winding and unwinding technology.

The essential introduction to the principles and applications of feedback systems—now fully revised and expanded This textbook covers the mathematics needed to model, analyze, and design feedback systems. Now more user-friendly than ever, this revised and expanded edition of Feedback Systems is a one-volume resource for students and researchers in mathematics and engineering. It has applications across a range of disciplines that utilize feedback in physical, biological, information, and economic systems. Karl Åström and Richard Murray use techniques from physics, computer science, and operations research to introduce control-oriented modeling. They begin with state space tools for analysis and design, including stability of solutions, Lyapunov functions, reachability, state feedback observability, and estimators. The matrix exponential plays a central role in the analysis of linear control systems, allowing a concise development of many of the key concepts for this class of models. Åström and Murray then develop and explain tools in the frequency domain, including transfer functions, Nyquist analysis, PID control, frequency domain design, and robustness. Features a new chapter on design principles and tools, illustrating the types of problems that can be solved using feedback Includes a new chapter on fundamental limits and new material on the Routh-Hurwitz criterion and root locus plots Provides exercises at the end of every chapter Comes with an electronic solutions manual An ideal textbook for undergraduate and graduate students Indispensable for researchers seeking a self-contained resource on control theory