Mechatronic systems | An-Najah Staff

Experimental Modelling and Identification of Compressible Flow through Proportional Directional Control Valves

Thu, 2014-05-29 11:22 — Bashir Mustafa Yousef Nouri

Journal Title, Volume, Page:

Universal Journal of Control and Automation 2(1): 4-13, 2014 DOI: 10.13189/ujca.2014.020102

Year of Publication:

2014

Link:

http://www.hrpub.org/journals/article_info.php?aid=1053

Authors:

Bashir M. Y. NOURI

Department of Mechanical Engineering, Faculty of Engineering and Information Technology, An-Najah National University, Nablus. Palestine

Current Affiliation:

Department of Mechanical Engineering, Faculty of Engineering and Information Technology, An-Najah National University, Nablus. Palestine

[email protected]

Ma’ali B. Y. SAUDI

Faculty of Economics and Administrative Sciences, An-Najah National University, Nablus. Palestine

Preferred Abstract (Original):

This paper derives an empirical model of the air flow through a variable area orifice of a 5-port proportional valve, in function of pressures at the supply port and at the pneumatic cylinder, i.e. including the flow resistance of the connecting tubes and fittings, and the (quasi-static) valve’s driving voltage. Effects of nonlinear flow through the valve, air compressibility in cylinder chambers, system identification, numerical simulation and model validation experiments were conducted and compared with theoretical models showing very good agreement. This Experimental model can be used in simulation and control of high performance pneumatic servo positioning systems, with applications in robotics and modern pneumatic tube transportation systems.

Friction Identification In Mechatronic Systems

Mon, 2013-02-11 14:42 — Bashir Mustafa Yousef Nouri

Journal Title, Volume, Page:

ISA Transactions, (A Journal For The Science And Engineering of Measurement And Automation),Vol 43, No 2, April 2004, pp 205-216

Year of Publication:

2004

Link:

http://www.ncbi.nlm.nih.gov/pubmed/15098581

Authors:

Bashir M. Y. Nouri

Department of Mechatronics Engineering, Faculty of Engineering, The Hashemite University, P. O. Box 150459, Zarqa 13115, Jordan

Current Affiliation:

Department of Mechanical Engineering, Faculty of Engineering and Information Technology, An-Najah National University, Nablus. Palestine

[email protected]

Preferred Abstract (Original):

Since no universal friction model exists and the practical measurement of friction is not straightforward, this paper presents an experimental method of identifying friction in mechatronic systems. Friction is perhaps the most important nonlinearity that may found in any mechatronic system of moving partsand influences the system in all regimes of operation. For the the purpose of improving the performance of mechatronic systems and solving their servo problem, a better understanding of friction behaviour in its two basic regimes is needed. In this paper, the two basic friction regimes, viz., presliding with its hysteresis behaviour, which is predominantly position dependent, and gross sliding, which is predominantly velocity dependent, are well exposed and identified.