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Shiying Liu,GUOJIAN LI,Mingdi Lan,Yongjun Piao,Yanan Zhang,QIANG WANG 한국물리학회 2020 Current Applied Physics Vol.20 No.3
The application of thermoelectric films is limited to retain the temperature gradient. In this study, the Bi-Te films are deposited on the AAO template with a pore size of 100 nm using thermal evaporation. The results show that the conductive types of the Bi-Te film are tuned by source temperature. The power factor of the p-type porous film decreases 36% by comparing to that of the p-type nonporous film (1020 μW/mK2 at 250 °C). Meanwhile, the temperature difference in the porous device is maintained and is approximately 5.0 °C. Thus, the maximum output power is achieved in the porous device (about 25 pW), which is 5 times higher than that of the nonporous device. This provides a method to improve the conversion efficiency of thermoelectric film device by maintaining the temperature difference by using porous structure.
Experimental Study of Adaptive Sliding Mode Control for Vibration of a Flexible Rectangular Plate
Yang, Jingyu,Liu, Zhiqi,Cui, Xuanming,Qu, Shiying,Wang, Chu,Lanwei, Zhou,Chen, Guoping The Korean Society for Aeronautical and Space Scie 2015 International Journal of Aeronautical and Space Sc Vol.16 No.1
This paper aims to address the intelligent active vibration control problem of a flexible rectangular plate vibration involving parameter variation and external disturbance. An adaptive sliding mode (ASM) MIMO control strategy and smart piezoelectric materials are proposed as a solution, where the controller design can deal with problems of an external disturbance and parametric uncertainty in system. Compared with the current 'classical' control design, the proposed ASM MIMO control strategy design has two advantages. First, unlike existing classical control algorithms, where only low intelligence of the vibration control system is achieved, this paper shows that high intelligent of the vibration control system can be realized by the ASM MIMO control strategy and smart piezoelectric materials. Second, the system performance is improved due to two additional terms obtained in the active vibration control system. Detailed design principle and rigorous stability analysis are provided. Finally, experiments and simulations were used to verify the effectiveness of the proposed strategy using a hardware prototype based on NI instruments, a MATLAB/SIMULINK platform, and smart piezoelectric materials.
Research Progress of the Structure Vibration-Attitude Coordinated Control of Spacecraft
Jingyu Yang,Shiying Qu,Jiahui Lin,Zhiqi Liu,Xuanming Cui,Chu Wang,Dujiang Zhang,Mingcheng gu,Zhongrui Sun,Kang Yang,Lanwei Zhou,Guoping Chen 한국항공우주학회 2015 International Journal of Aeronautical and Space Sc Vol.16 No.4
This paper gives an overview of research on the field of structure vibration-attitude coordinated control of spacecraft. First of all, the importance of the technology has been given an introduction, and then later the research progress of space structure dynamics modeling, research progress of structure vibration-attitude coordinated control of flexible spacecraft have been discussed respectively. Finally, future research on application of structure vibration-attitude coordinated control of spacecraft has been recommended.
Experimental Study of Adaptive Sliding Mode Control for Vibration of a Flexible Rectangular Plate
Jingyu Yang,Zhiqi Liu,Xuanming Cui,Shiying Qu,Chu Wang,Zhou Lanwei,Guoping Chen 한국항공우주학회 2015 International Journal of Aeronautical and Space Sc Vol.16 No.1
This paper aims to address the intelligent active vibration control problem of a flexible rectangular plate vibration involving parameter variation and external disturbance. An adaptive sliding mode (ASM) MIMO control strategy and smart piezoelectric materials are proposed as a solution, where the controller design can deal with problems of an external disturbance and parametric uncertainty in system. Compared with the current ‘classical’ control design, the proposed ASM MIMO control strategy design has two advantages. First, unlike existing classical control algorithms, where only low intelligence of the vibration control system is achieved, this paper shows that high intelligent of the vibration control system can be realized by the ASM MIMO control strategy and smart piezoelectric materials. Second, the system performance is improved due to two additional terms obtained in the active vibration control system. Detailed design principle and rigorous stability analysis are provided. Finally, experiments and simulations were used to verify the effectiveness of the proposed strategy using a hardware prototype based on NI instruments, a MATLAB/SIMULINK platform, and smart piezoelectric materials.
Research Progress of the Structure Vibration-Attitude Coordinated Control of Spacecraft
Yang, Jingyu,Qu, Shiying,Lin, Jiahui,Liu, Zhiqi,Cui, Xuanming,Wang, Chu,Zhang, Dujiang,gu, Mingcheng,Sun, Zhongrui,Yang, Kang,Zhou, Lanwei,Chen, Guoping The Korean Society for Aeronautical and Space Scie 2015 International Journal of Aeronautical and Space Sc Vol.16 No.4
This paper gives an overview of research on the field of structure vibration-attitude coordinated control of spacecraft. First of all, the importance of the technology has been given an introduction, and then later the research progress of space structure dynamics modeling, research progress of structure vibration-attitude coordinated control of flexible spacecraft have been discussed respectively. Finally, future research on application of structure vibration-attitude coordinated control of spacecraft has been recommended.