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Control Design Method of Semi-Active Suspensions with Actuators
Takanori FUKAO,Takafumi SUZUKI,Hiroaki EGUCHI,Koichi OSUKA 한국자동차공학회 2005 한국자동차공학회 Workshop Vol.2005 No.-
Semi-active suspension systems which adjust the damping coefficients of the shock absorbers have been widely researched to improve the ride quality. But the property of the actuator is almost ignored because the system becomes nonlinear and it is difficult to design a controller. In this research, a backstepping method is introduced to combine H∞, control for frequency shaping with nonlinear control for actuators, Furthermore, a velocity-dependent nonlinear weight on the control error in backstepping is proposed to improve the control property. The validity of the proposed method is confirmed by some simulation results.
임영환,김준영,박경수,조태우,전재환,정광일,Koichi Eguchi,강미숙 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.64 No.-
This study focused on improving the cell efficiency of Zinc–Nickel redox battery. The cycle life of zinc anodic material in KOH alkaline electrolyte was enhanced by small amount of Mg insertion into ZnO framework through a typical hydrothermal method. The as-prepared ZnO and MgxZn1−xO (x = 0.001, 0.0025, and 0.005) anodic materials before and after charging/discharging test were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometer (EDX) to investigate the effect of inserted Mg ions on the zinc dendrite growth. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were utilized to examine the electrochemical performances of Mg-inserted ZnO as anodic material. The Mg-inserted ZnO–Ni membrane free redox batteries possess higher discharge voltage, higher cycle stability, lower corrosion current, and smaller charge-transfer resistance in comparison with bare ZnO. In addition, the redox cell efficiency was 85% in the ZnO anodic material inserted Mg of 0.0025 mol even after 100 cycles.
Im, Younghwan,Kim, Junyeong,Park, Kyoung Soo,Cho, Tae Woo,Jeon, Jaehwan,Chung, Kwang-il,Eguchi, Koichi,Kang, Misook THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2018 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.64 No.-
<P><B>Abstract</B></P> <P>This study focused on improving the cell efficiency of Zinc–Nickel redox battery. The cycle life of zinc anodic material in KOH alkaline electrolyte was enhanced by small amount of Mg insertion into ZnO framework through a typical hydrothermal method. The as-prepared ZnO and Mg<SUB>x</SUB>Zn<SUB>1−x</SUB>O (x=0.001, 0.0025, and 0.005) anodic materials before and after charging/discharging test were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometer (EDX) to investigate the effect of inserted Mg ions on the zinc dendrite growth. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were utilized to examine the electrochemical performances of Mg-inserted ZnO as anodic material. The Mg-inserted ZnO–Ni membrane free redox batteries possess higher discharge voltage, higher cycle stability, lower corrosion current, and smaller charge-transfer resistance in comparison with bare ZnO. In addition, the redox cell efficiency was 85% in the ZnO anodic material inserted Mg of 0.0025mol even after 100 cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Improved cell efficiency of Zinc–Nickel redox battery. </LI> <LI> Mg<SUB>x</SUB>Zn<SUB>1−x</SUB>O was synthesized through a typical hydrothermal method. </LI> <LI> Mg<SUB>x</SUB>Zn<SUB>1−x</SUB>O–Ni possess higher cycle stability, lower corrosion current, and smaller charge-transfer resistance. </LI> <LI> Mg<SUB>0.0025</SUB>Zn<SUB>0.9975</SUB>O showed 85% redox cell efficiency after 100 cycles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>