[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 1, pp.22-29

ISSN: 2508-5107 (Online)

Print publication date 15 Feb 2020

Received 21 Jan 2020 Revised 04 Feb 2020 Accepted 07 Feb 2020

DOI: https://doi.org/10.7735/ksmte.2020.29.1.22

공기압 관로의 동적 모델링과 과도응답 특성 해석

김연수^a ; 김도태^b^{, *}

Dynamic Modeling and Transient Response of Pneumatic Transmission Pipes

Yeon-Su Kim^a ; Do-Tae Kim^b^{, *}

aDepartment of Automobile, Dalseong Campus of Korea Polytechnics
bSchool of Mechanical and Automotive Engineering, Kyungil University

Correspondence to: ^*Tel.: +82-53-600-5325 E-mail address: dtkim@kiu.ac.kr (Do-Tae Kim).

Abstract

The study deals with dynamic modeling and time domain simulation of pneumatic transmission pipes with a distributed parameter dissipative model that include frequency dependent viscous friction terms and heat transfer effects. The transient responses of pneumatic transmission pipes are considerably complex and difficult because the transcendent transfer functions consist of hyperbolic Bessel functions in the frequency domain. For the blocked pipes at the downstream, the pipes terminating into single valve and capacitance element pairs, transfer functions are derived, and their gain and phases are calculated theoretically. Based on the frequency responses of the theoretical transfer functions, we obtained approximated transfer functions with equal frequency responses using MATLAB. The approximated transfer functions with rational polynomials are accurate over the designated frequency ranges, and are used to analyze the time domain responses. The effects of varying parameters of the blocked pipe on the accuracy of the simulated responses are investigated.

Keywords:

Pneumatic transmission pipe, Distributed parameter model, Frequency dependent viscous friction, Frequency response, Transfer function, Transient response

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Yeon Su Kim

Professor in the Department of Automobile, Dalseong Campus of Korea Polytechnics.His research interest is pneumatic systems in vehicles.

E-mail: kimys6@kopo.ac.kr

Do Tae Kim

Professor in School of Mechanical and Automotive Engineering, Kyungil University.His research interest is fluid power control and fluid transmission line dynamics.

E-mail: dtkim@kiu.ac.kr