Approaches for efficient stiction compensation in process control valves

Autor:	Raghunathan Rengaswamy, Ranganathan Srinivasan
Rok vydání:	2008
Předmět:	Nonlinear system Engineering In process control Model predictive control business.industry Control theory General Chemical Engineering Limit (music) Stiction business Energy (signal processing) Computer Science Applications Compensation (engineering)
Zdroj:	Computers & Chemical Engineering. 32:218-229
ISSN:	0098-1354
Popis:	Limit cycles caused due to valve nonlinearity such as stiction can be eliminated with proper valve maintenance. Valve maintenance is undertaken during production stops, which are scheduled once every 6 months to 3 years. The loss of energy and product quality during this intermediate period can be quite high. Stiction compensation algorithms can mitigate this problem to a large extent. In this paper, two novel approaches for stiction compensation are proposed: (a) a simple two-move approach and (b) an optimization based approach much in the spirit of predictive control strategies. Both the approaches are based on a data-driven model for stiction. The merits and demerits of both these approaches are discussed. The results are illustrated using simulation case studies. The two-move approach is also validated on a liquid level system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3a6e806c3169da8cbca5b456b1027b82 https://doi.org/10.1016/j.compchemeng.2007.05.005 Zobrazit plný text záznamu Full Text from ScienceDirect