Please use this identifier to cite or link to this item: https://scidar.kg.ac.rs/handle/123456789/10883
Title: Describing function of the pneumatic flapper-nozzle valve
Authors: Pršić, Dragan
Fragassa, Cristiano
Nedić, Novak
Pavlović A.
Journal: Mechanical Systems and Signal Processing
Issue Date: 1-Jun-2019
Abstract: © 2019 Elsevier Ltd This paper addresses the mass flow rate characteristic of a pneumatic valve set in the frequency domain. The valve set consists of a flapper-nozzle type valve and a constant isothermal volume chamber. It represents a part of the control system of the pneumatic parallel robot platform. Different flow regimes are analyzed because of air compressibility. The nonlinearity originating from the mass flow rate characteristic is approximated by the sinusoidal input describing function. Analytical determination of the describing function in a general case is not possible. However, the equivalent nonlinearity and the corresponding Hammerstein model can be introduced for a certain flow regime. In that case, the describing function of nonlinearity can be determined analytically. Amplitude and frequency responses show that the nonlinearity becomes more prominent at smaller frequencies and higher amplitudes of the exogenous signal. Analytical results show good agreement with the experimental results.
URI: https://scidar.kg.ac.rs/handle/123456789/10883
Type: Article
DOI: 10.1016/j.ymssp.2019.01.043
ISSN: 08883270
SCOPUS: 85061452526
Appears in Collections:Faculty of Mechanical and Civil Engineering, Kraljevo
[ Google Scholar ]

Page views(s)

12

Files in This Item:
File Description SizeFormat 
PaperMissing.pdf
  Restricted Access
29.86 kBAdobe PDFThumbnail
View/Open Request a copy


Items in SCIDAR are protected by copyright, with all rights reserved, unless otherwise indicated.