Reduced-order thermodynamic models for servo-pneumatic actuator chambers

• Type: Article in International Scientific Journal
• Date: 2006

Authors

J. Falcão Carneiro (Author) FEUP; F. Gomes de Almeida (Author) FEUP

Journal

Title: Proceedings of the IMECHE, Journal of Systems and Control Engineering

Vol. 220 No. 4

Pages: 301-314

ISSN: 09596518

Indexing

ISI Web of Knowledge - 29 Citations

ISI Web of Science

Scopus - 55 Citations

INSPEC

COMPENDEX

Scientific classification

CORDIS: Technological sciences > Engineering > Control engineering > Automation

Other information

Authenticus ID: P-004-KM6

DOI: 10.1243/09596518JSCE203

Abstract (EN): This paper discusses thermodynamic models of air inside pneumatic actuator chambers. In servopneumatics common practice, these models are simplified by neglecting the temperature dynamics. Classical models in literature assume temperature inside the pneumatic chamber to be either constant or to follow a polytropic law. Furthermore, the mixing process of air entering the chamber and heat transfer between air and cylinder walls is often neglected or only implicitly taken into account. This work evaluates the impact of these simplifications/order reductions in the prediction of pressure inside the actuator chamber. Classical models are compared with several others taking into account not only the mixing process but also explicitly including heat transfer between air and cylinder walls. Simulation studies show that the reduced order models proposed in this paper can lead to a mean square error in pressure prediction of only 10% of the one obtained using classical models.

Language: English

Type (Professor's evaluation): Scientific