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Zoran Bucevac,Radisa Jovanovic 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.3
Linear time-invariant discrete-time plant, with no restrictions on the form of the state equation andwith scalar control, is considered. The exponentially stabilizing state feedback control algorithm is developed byLyapunov’s second method leading to the variable structure system with chattering free sliding modes. Essentially,the control algorithm drives the system from an arbitrary initial state to a prescribed so-called sliding subspace S, infinite time and with prescribed velocity estimate. Inside the sliding subspace S, the system is switched to the slidingmode regime and stays in it forever. The proposed algorithm is tested on the real system in practice, direct current(DC) servo motor, and simulation and experimental results are given. Also, it is compared with another alreadyknown algorithm from literature.
Omerasevic, Mia,Lukic, Miodrag,Savic-Bisercic, Marjetka,Savic, Andrija,Matovic, Ljiljana,Bascarevic, Zvezdana,Bucevac, Dusan Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.1
A promising method for removal of Cs ions from water and their incorporation into stable crystal structure ready for safe and permanent disposal was described. Cs-exchanged X zeolite was hot-pressed at temperature ranging from 800 to 950 ℃ to fabricate dense pollucite ceramics. It was found that the application of external pressure reduced the pollucite formation temperature. The effect of sintering temperature on density, phase composition and mechanical properties was investigated. The highest density of 92.5 %TD and the highest compressive strength of 79 MPa were measured in pollucite hot-pressed at 950 ℃ for 3 h. Heterogeneity of samples obtained at 950 ℃ was determined using scanning electron microscopy. The pollucite hot-pressed at 950 ℃ had low linear thermal expansion coefficient of ~4.67 × 10<sup>-6</sup> K<sup>-1</sup> in the temperature range from 100 to 1000 ℃.