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Study on the Melting of the Defective Interstitial Alloys TaSi and WSi with BCC Structure
Nguyen Quang Hoc,Tran Dinh Cuong,Bui Duc Tinh,Le Hong Viet 한국물리학회 2019 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.74 No.8
The statistical moment method is used to study the melting of defective interstitial AB alloys, where A is the main element and B is an interstitial atom, with a body-centered-cubic (BCC) structure. The melting temperature of the AB alloy with defects is obtained from the temperature of absolute stability for the crystalline state and the equilibrium vacancy concentration. Numerical calculations are performed for the interstitial alloys TaSi and WSi. Our calculated results are in good agreement with other calculations.
Van Hoc Vu,Giap Van Nam,Nguyen Quang Dich 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.6
This paper presents a fast-reaching law of sliding mode control for the slotless self-bearing motor (SSBM) with fully embedded of the load torque on the speed axis. This is a new consideration of the disturbance on the speed control axis in compare with the previous works. Furthermore, the uncertain values of the fabrication, winding process, and modeling are all matched with the control input channel, which are rejected by the robust control method. To obtain the gold of expectations with robustness, the mathematical model of SSBM is fi rstly given with an explanation of sources of the uncertainties. Second, the exponential reaching law sliding mode control (ERL-SMC) is employed to design the controller of all positions and speed axes, respectively. Third, the stability analysis is given to show the correction of the designed controllers. Fourth, the simulation by using MATLAB software and experimental by using laboratory motor prototype were used to show the eff ectiveness of the designed control method. The obtained results show that the settling times are small, the steady-states are stable with uncertainties and external load torque.