GPS-X Technical Reference

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Table of Contents
CHAPTER 12 ........................................................................................................................................... 336
Tools Object .......................................................................................................................................... 336
Data Transfer .................................................................................................................................... 336
Sampler ............................................................................................................................................. 336
PH Tool ............................................................................................................................................. 337
Low-Pass Filtering ............................................................................................................................ 341
ON/OFF Control ............................................................................................................................... 342
PID Control ....................................................................................................................................... 344
Feedforward-Feedback Controllers .................................................................................................. 352
Timer Control ................................................................................................................................... 355
Multivariable Controllers .................................................................................................................. 355
Flow Timer Model ............................................................................................................................ 356
Scheduler Model ............................................................................................................................... 357
CHAPTER 13 ........................................................................................................................................... 361
Operating Cost Models ......................................................................................................................... 361
Introduction ....................................................................................................................................... 361
Model Structure ................................................................................................................................ 361
Operating Cost Model Parameters .................................................................................................... 365
Operating Cost Model Display Variables ......................................................................................... 367
Calibration of Operating Cost Models .............................................................................................. 369
Operating Costs for Each Object ...................................................................................................... 369
CHAPTER 14 ........................................................................................................................................... 372
Optimizer .............................................................................................................................................. 372
Introduction ....................................................................................................................................... 372
Optimizer Description ....................................................................................................................... 372
Objective Function Options .............................................................................................................. 374
Termination Criteria ......................................................................................................................... 376
Types of Optimization ...................................................................................................................... 377
Summary of the Optimizer Settings and Parameters ........................................................................ 381
Optimization Strategies ..................................................................................................................... 386
Appendix A: Maximum Likelihood Method ................................................................................... 387
Appendix B: The Optimizer Solution Report .................................................................................. 392
Appendix C: Nomenclature ............................................................................................................. 409
Appendix D: References .................................................................................................................. 411
CHAPTER 15 ........................................................................................................................................... 413
Miscellaneous ....................................................................................................................................... 413
Statistical Criteria to Evaluate Simulation Results in Wastewater Treatment Modelling ................ 413
Measured Data Types ....................................................................................................................... 414
Statistical Indices .............................................................................................................................. 415
Statistical Plots .................................................................................................................................. 418
Residual Plots ................................................................................................................................... 419
GPS-X Technical Reference