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A thermal oscillator for optimization of control
Author(s) -
Tennankore K. N.,
Bock H. H. R.
Publication year - 1977
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450550410
Subject(s) - measure (data warehouse) , process (computing) , control theory (sociology) , maximization , filter (signal processing) , control system , transfer function , quality (philosophy) , control (management) , controller (irrigation) , thermal , computer science , process control , electronic engineering , engineering , mathematics , physics , electrical engineering , mathematical optimization , thermodynamics , agronomy , quantum mechanics , database , artificial intelligence , computer vision , biology , operating system
Bock suggested in 1972 a practical measure for the quality of control of a process as the ratio of ‘external disturbance’ to ‘error’ in the system. Optimization of the control of chemical engineering processes according to this measure requires low frequency filters. In this study a low frequency thermal oscillator has been developed by using a brass rod with a heating section at the middle and a sensing section at one end. The frequency response of this system shows that the equivalent pathlength for heat transfer is more than the distance between the heater and the sensor. Feedback oscillations have been obtained with proper circuitry between the sensor and the heater in dicating the possibility of using the system as a low frequency filter for optimizing the control of a process according to Bock's measure for the quality of control. A scheme for the measurement of the quality of control and its maximization is briefly outlined.