Relay Autotuning of Cascade-Controlled Open-Loop Unstable Reactors

Autor:	B. Wayne Bequette, Futao Zhao, Vikas Saraf
Rok vydání:	2003
Předmět:	Loop (topology) Steady state Control theory Computer science Cascade General Chemical Engineering Open-loop controller Continuous stirred-tank reactor General Chemistry Chemical reactor Nonlinear Oscillations Industrial and Manufacturing Engineering Parametric statistics
Zdroj:	Industrial & Engineering Chemistry Research. 42:4488-4494
ISSN:	1520-5045 0888-5885
Popis:	Continuous stirred tank reactors (CSTRs) can present operational problems as a result of complex open-loop behavior such as input and output multiplicities, parametric sensitivities, and nonlinear oscillations. It is sometimes appropriate to operate a chemical reactor at an unstable steady state. Traditionally, autotuning procedures for cascade-control strategies are applied using a sequential, one-loop-at-a-time method. Such a method, however, cannot be used on open-loop unstable systems because the secondary loop cannot stabilize the system when the primary loop is open. As a result, a new simultaneous autotuning procedure is proposed for the cascade controllers of open-loop unstable CSTR processes. This new approach can also be used for the autotuning of cascade-controlled open-loop stable systems, thereby covering a wide operation range for CSTR cascade-control systems.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b7d1de3cc1a258801ffc6fb9540c6773 https://doi.org/10.1021/ie0011268 Zobrazit plný text záznamu