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Adaptive Wavelet CMAC Tracking Control for Induction Servomotor Drive System
Thanh-Quyen Ngo,Mien-Ka Duong,D. C. Pham,Duc-Nam Nguyen 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.1
This research proposes an enhanced control system for induction servomotor to obtain the high-precision position tracking based on wavelet cerebellar model articulation controller. The proposed controller combines the wavelet cerebellar articulation model (WCMAC) with compensator controller to have high performance for the system. The superior properties of the WCMAC are its fast learning of the CMAC and wavelet decomposition capability. Therefore, it is used to mimic a model-based controller with exactly unknown parameters. The compensator controller with an estimated boundary error attenuates the effects of disturbances due to time-varying parameters and load acting on the shaft of motor. The online learning rules of WCMAC derived from gradient-descent method and Lyapunov function is used to estimate bound error to ensure the stability of the system. The experimental results for induction servomotor are provided to conclude the effectiveness of the proposed control system even the dynamic model of the induction servomotor is completely unknown.
Virus-Based Structural Color Sensor for the Endocrine Disrupting Chemicals Detection
Yujin Lee,Ye-Ji Kim,Thanh Mien Nguyen,Yeong Ju Lee,You Hwan Kim,Seung Su Jeong,Jae Suk Yoon,Na Yeung Kim,Jun Su Choi,Min Soo Kim,Jin Jae Park,Suk Ho Lee,Eun Jung Choi,Jin-Woo Oh 한국고분자학회 2019 한국고분자학회 학술대회 연구논문 초록집 Vol.44 No.2
Unveiling facet effects in metallic nanoparticles to design an efficient plasmonic nanostructure
Devaraj Vasanthan,Lee Il Hyun,Kim Minjun,Nguyen Thanh Mien,Son Jong Pil,Lee Jong-Min,Lee Donghan,Kim Kwang Ho,오진우 한국물리학회 2022 Current Applied Physics Vol.44 No.-
We investigated the role of nanoparticle surface morphology (facets) in estimating the plasmonic properties of nanoparticle-on-a-mirror design or NPOM in the presence of a thicker (20 nm) dielectric layer. Nanoparticle surface morphology differences ranging from smoother surface to multi-facets in the form of a sphere (NSOM), cube (NCOM), and singe bottom faceted sphere (SBF-NSOM) shapes have been employed. Three significant optical properties were observed. Better longer wavelength near-field and far-field resonance spectral positions from NCOM are achieved. Near-field enhancement extracted from SBF-NSOM outperformed NCOM by more than ~ two times. Plasmonic gap mode enhancement is absent for NSOM in the presence of a larger dielectric layer. The availability of plasmonic gap modes in NCOM and SBF-NSOM, even at a 20 nm thick dielectric layer, is highly beneficial for various plasmonic applications. These differences in optical properties are understood by the role of NP facets in influencing the plasmonic cavity region.