Tore Hägglund – författare

Boken, som nu ges ut i en fjärde utvidgad och omarbetad upplaga, vänder sig till personer som är verksamma i industrin och kommer i kontakt med reglerteknik, som operatörer och olika kategorier av ingenjörer. Den är också lämplig att använda i skolor och utbildningar där reglerteknik ingår. Den nya upplagan har kompletterats med problem med lösningar, vilket gör den speciellt användbar för undervisning. Boken är skriven på ett sådant sätt att den inte förutsätter matematikkunskaper utöver grundskolenivå. Innehållet består av de praktiska delar av reglertekniken som idag används i processindustrin och den innehåller många exempel från denna industri.Praktisk processreglering inleds med en genomgång av metoder för att bestämma dynamiken hos de processavsnitt som ska regleras, samt PID-regulatorns uppbyggnad och användningsområden. Därefter beskrivs de vanligaste metoderna för att ställa in PID-regulatorn. Många reglertekniska problem orsakas av glapp och friktion i ventiler och andra olinjära fenomen. Dessa problem diskuteras och olika metoder för att lösa dem presenteras.Boken avslutas med en detaljerad beskrivning av olika metoder och strategier för att konfigurera instrumenteringen i processindustrin.

The authors of the best-selling book ""PID Controllers: Theory, Design, and Tuning"" once again combine their extensive knowledge in the PID arena to bring you an in-depth look at the world of PID control. A new book, ""Advanced PID Control"" builds on the basics learned in ""PID Controllers"" but augments it through use of advanced control techniques. Design of PID controllers are brought into the mainstream of control system design by focusing on requirements that capture effects of load disturbances, measurement noise, robustness to process variations and maintaining set points. In this way it is possible to make a smooth transition from PID control to more advanced model based controllers. It is also possible to get insight into fundamental limitations and to determine the information needed to design good controllers.The book provides a solid foundation for understanding, operating and implementing the more advanced features of PID controllers, including auto-tuning, gain scheduling and adaptation. Particular attention is given to specific challenges such as reset windup, long process dead times, and oscillatory systems. As in their other book, modeling methods, implementation details, and problem-solving techniques are also presented.

This book covers the most important topics that people working as process control engineers and plant operators will encounter. It focuses on PID control, explains when to use P-, PI-, PD- or PID control as well as PID tuning and includes difficult to control process nonlinearities such as valve stiction or sensor problems. The book also explains advanced control strategies that are necessary when single loop control gives insufficient results. The key features of the text in front of you are: This book is a result of teaching the material to industrial practitioners over three decades and four previous editions in Swedish, each of which was a refi nement of the previous one. A key contribution of this book is the careful selection of what is required when you are at a plant and have to make sense of what you see. The book is written in such a way that it does not assume mathematical knowledge above the compulsory school level. Process control sits between control engineering and process or chemical engineering and often there is a distinct gap between the two. By explaining both the fundamentals of control and the processes the book is written to appeal to control engineers and process engineers alike. The book includes exercises and solutions and thus lends itself for teaching in the classroom.