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Parameter identification and optimal control of ground temperature
Author(s) -
Kawahara Mutsuto,
Sasaki KenIchi,
Sano Yasuhiko
Publication year - 1995
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650200807
Subject(s) - temperature control , identification (biology) , conjugate gradient method , minification , controller (irrigation) , control theory (sociology) , system identification , optimal control , distributed parameter system , control (management) , computer science , mathematical optimization , mathematics , engineering , control engineering , partial differential equation , mathematical analysis , agronomy , botany , artificial intelligence , database , biology , measure (data warehouse)
Abstract To avoid the use of pesticides on putting greens of golf courses, a temperature regulator system is strongly recommended nowadays in Japan. To maintain grass on the putting green without pesticide, the temperature of the ground should be controlled. This system consists of a cooling machine and buried pipes in the ground. The temperature of the water in the pipes cannot be regulated. In this paper, both identification and control problems are presented by the minimization technique and applied to a practical problem. To establish the system, it is important to obtain accurate parameters which are included in the governing equation. These parameters can be determined by parameter identification. The conjugate gradient method is used for the parameter identification procedure. The control problem aims to make the temperature at arbitrary points close to the objective temperature. The discrete‐time dynamic programming is used for the control procedure.