Thin-walled structures are sensitive to vibrate under even very small disturbances. In order to design a suitable controller for vibration suppression of thin-walled smart structures, an electro-mechanically coupled f...Thin-walled structures are sensitive to vibrate under even very small disturbances. In order to design a suitable controller for vibration suppression of thin-walled smart structures, an electro-mechanically coupled finite element（FE） model of smart structures is developed based on first-order shear deformation（FOSD） hypothesis. Considering the vibrations generated by various disturbances, which include free and forced vibrations, a PID control is implemented to damp both the free and forced vibrations. Additionally, an LQR optimal control is applied for comparison.The implemented control strategies are validated by a piezoelectric layered smart plate under various excitations.展开更多
Looking from the institutional system that the stock market services the state-owned enterprises, the bad corporate governing structure of the state-owned listed companies, the lack of balance between the yield from a...Looking from the institutional system that the stock market services the state-owned enterprises, the bad corporate governing structure of the state-owned listed companies, the lack of balance between the yield from an investment and the stock, and the polarization of the wealth distribution in the stock market, we make an intensive analysis and exploration on the inefficiency of transmitting monetary policy of Chinese capital market herein.展开更多
基金supported by the National Natural Science Foundation of China(No.51275413)financial support from the China Scholarship Council of China for the first author(No.2010629003)
文摘Thin-walled structures are sensitive to vibrate under even very small disturbances. In order to design a suitable controller for vibration suppression of thin-walled smart structures, an electro-mechanically coupled finite element（FE） model of smart structures is developed based on first-order shear deformation（FOSD） hypothesis. Considering the vibrations generated by various disturbances, which include free and forced vibrations, a PID control is implemented to damp both the free and forced vibrations. Additionally, an LQR optimal control is applied for comparison.The implemented control strategies are validated by a piezoelectric layered smart plate under various excitations.
文摘Looking from the institutional system that the stock market services the state-owned enterprises, the bad corporate governing structure of the state-owned listed companies, the lack of balance between the yield from an investment and the stock, and the polarization of the wealth distribution in the stock market, we make an intensive analysis and exploration on the inefficiency of transmitting monetary policy of Chinese capital market herein.
