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- 저자 : Quang Dich Nguyen (검색결과 2 건)
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Quang Dich Nguyen,Van Nam Giap,Shyh-Chour Huang 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.11
This paper proposes a new stability condition for a fractional order calculus (FOC)-based for the disturbance observer (DO) and sliding mode control (SMC) of a secure communication system (SCS). First, the mathematics of the chaotic system was remodeled into the Takagi-Sugeno fuzzy (TSF) with the aim of softening the calculation of control design and stability analysis. Second, the synchronization of two nonidentical chaotic systems was adopted by using a newly proposed Lyapunov-based stability condition. Third, a new disturbance observer was proposed based on the suggested stability condition together with the inversed model-based concept. To show the correction of the proposed method, the stability analysis was adopted to obtain the goal. Finally, the simulation by using MATLAB software was used to conduct the effectiveness of the proposed methods. The achievements are small tracking errors, stable steady-states, and all tested disturbances and uncertainties were mostly rejected.
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Homogeneous Disturbance Observer Based on Sliding Mode Observer and Controller for T-Type Inverter
Do Tuan Anh,Pham Quoc Huy,Giap Van Nam,Nguyen Quang Dich,Vu Phuong 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3
This paper proposes a novel sliding mode control (SMC) for the T-Type inverter in the standalone mode. Firstly, the accuracy of the estimated states used to construct the fxed-time SMC and the disturbance observer (DOB) is improved by a proposed sliding mode observer (SMO). Secondly, a DOB is designed without the requirement of the frst derivative or the format of the disturbance. Thirdly, an advanced reaching law is utilized for both the SMO, the DOB, and the SMC controller for the chattering elimination. Fourth, the stability of the proposed controller is confrmed by the Lyapunov condition. The performance of the proposed control strategy is validated by simulations and experiments with the same scenarios of nonlinear load and parameter variations. The results prove that the output voltage of the proposed control method meets the standard EN 62040 with the total harmonic distortion being lower than 5% in all cases, which is superior to the performance of the traditional controller.
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