9.8 Pattern Recognition Tuning of Integrating
Control Loops ........................................................... 99

9.9 Summary..................................................................102

Exercises...........................................................................102

References ........................................................................103

10 Open-Loop Testing of Process Response .............105

Learning Objectives .........................................................105

10.1 Self-Regulating Process Response...........................106

10.2 Ziegler–Nichols (Z–N) Open-Loop Tuning Rules
of Thumb.................................................................107

10.3 Two-Point Characterization of FOPDT Process
Response.................................................................. 110

10.4 Quarter Decay Ratio (QDR) Tuning Rules.............. 112

10.5 Internal Model Control (IMC) Tuning Rules ........... 113

10.6 Integrating Process Response ................................. 114

10.7 Summary.................................................................. 116

Exercises........................................................................... 117

References ........................................................................ 117

Appendix: Solutions to Chapter Exercises ................. 119

Index ..........................................................................127

viii ◾  Contents