N-Doped mesoporous hollow carbon spheres(MHCSs)with different inner structures have attracted increasing attention in energy storage devices due to their low density and high electrical conductivity.Herein,vesicles fo...N-Doped mesoporous hollow carbon spheres(MHCSs)with different inner structures have attracted increasing attention in energy storage devices due to their low density and high electrical conductivity.Herein,vesicles formed by the molecular self-assembly of the ionic liquid surfactant derived from its unique properties(e.g.lower charge density andπ–πinteraction between the polar heads)are employed as soft templates to synthesize two kinds of uniform MHCSs(e.g.mesoporous hollow carbon spheres and core–shell structured carbon nanospheres)with high nitrogen(N)doping and various inner layouts including hollow,yolk–shell and Momordica grosvenori-like structures.展开更多
提出一种采用石墨自润滑球铰连接的立方体构型Stewart隔振平台,6个支腿通过可转动的球铰与基础及载荷平台相连,每个支腿由音圈作动器与力传感器构成。在假设各支腿、基础及载荷平台均为弹性体的基础上,采用子结构频响函数综合法对Stewar...提出一种采用石墨自润滑球铰连接的立方体构型Stewart隔振平台,6个支腿通过可转动的球铰与基础及载荷平台相连,每个支腿由音圈作动器与力传感器构成。在假设各支腿、基础及载荷平台均为弹性体的基础上,采用子结构频响函数综合法对Stewart隔振平台进行动力学建模,并通过FEM方法进行验证,给出内嵌反馈控制的隔振平台模型,对反馈控制效果进行仿真验证;在仿真分析的基础上,对隔振平台的被动隔振性能和内嵌反馈控制的主动隔振性能进行实验。结果表明,被动隔振在30~200 Hz频段内具有约-36 d B/dec的衰减率,主动隔振在3~100 Hz频段内可获得最大20 d B的幅值衰减,<200 Hz,支腿力RMS值控制后下降75%~80%。展开更多
基金financial support from the Natural Science Foundation of China(no.21673201 and 22075290)and the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions(TAPP).We also acknowledge the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘N-Doped mesoporous hollow carbon spheres(MHCSs)with different inner structures have attracted increasing attention in energy storage devices due to their low density and high electrical conductivity.Herein,vesicles formed by the molecular self-assembly of the ionic liquid surfactant derived from its unique properties(e.g.lower charge density andπ–πinteraction between the polar heads)are employed as soft templates to synthesize two kinds of uniform MHCSs(e.g.mesoporous hollow carbon spheres and core–shell structured carbon nanospheres)with high nitrogen(N)doping and various inner layouts including hollow,yolk–shell and Momordica grosvenori-like structures.
文摘提出一种采用石墨自润滑球铰连接的立方体构型Stewart隔振平台,6个支腿通过可转动的球铰与基础及载荷平台相连,每个支腿由音圈作动器与力传感器构成。在假设各支腿、基础及载荷平台均为弹性体的基础上,采用子结构频响函数综合法对Stewart隔振平台进行动力学建模,并通过FEM方法进行验证,给出内嵌反馈控制的隔振平台模型,对反馈控制效果进行仿真验证;在仿真分析的基础上,对隔振平台的被动隔振性能和内嵌反馈控制的主动隔振性能进行实验。结果表明,被动隔振在30~200 Hz频段内具有约-36 d B/dec的衰减率,主动隔振在3~100 Hz频段内可获得最大20 d B的幅值衰减,<200 Hz,支腿力RMS值控制后下降75%~80%。
