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Time-dependent thermo-elastic creep analysis of thick-walled spherical pressure vessels made of functionally graded materials (2015)
Journal Article
Davoudi Kashkoli, M., & Nejad, M. Z. (2015). Time-dependent thermo-elastic creep analysis of thick-walled spherical pressure vessels made of functionally graded materials. Journal of Theoretical and Applied Mechanics, 53(4), 1053-1065. https://doi.org/10.15632/jtam-pl.53.4.1053

Assuming that the thermo-elastic creep response of the material is governed by Norton's law and material properties, except Poisson's ratio, are considered as a function of the radius of the spherical vessel, an analytical solution is presented for c... Read More about Time-dependent thermo-elastic creep analysis of thick-walled spherical pressure vessels made of functionally graded materials.

Fuzzy PID control of a stand-alone system based on PEM fuel cell (2015)
Journal Article
Rakhtala, S. M., & Shafiee Roudbari, E. (2016). Fuzzy PID control of a stand-alone system based on PEM fuel cell. International Journal of Electrical Power and Energy Systems, 78, 576-590. https://doi.org/10.1016/j.ijepes.2015.12.003

Fuel cell (FC) systems are appropriate candidates as alternative energy sources for use in stand-alone applications. However, the FC generates an unregulated voltage, which is not suitable in stand-alone application usage solely. This paper presents... Read More about Fuzzy PID control of a stand-alone system based on PEM fuel cell.

Control of oxygen excess ratio in a PEM fuel cell system using high-order sliding-mode controller and observer (2015)
Journal Article
Rakhtala, S. M., Noei, A. R., Ghaderi, R., & Usai, E. (2015). Control of oxygen excess ratio in a PEM fuel cell system using high-order sliding-mode controller and observer. Turkish Journal of Electrical Engineering & Computer Sciences, 23(1), 255-278. https://doi.org/10.3906/elk-1301-90

The main objective of this manuscript is to design a high-order sliding-mode observer to provide finite time estimation of unmeasurable states (x4 : oxygen mass, x5 : nitrogen mass) together with the oxygen excess ratio (ratio of the input oxygen ow... Read More about Control of oxygen excess ratio in a PEM fuel cell system using high-order sliding-mode controller and observer.