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Decang Li Jianjun Meng Huan Bai Ruxun Xu 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2018,56(7):1028-1050
This paper focuses on the safety of high-speed trains under strong crosswind conditions. A new active control strategy is proposed based on the adaptive predictive control theory. The new control strategy aims at adjusting the attitudes of a train by controlling the new-type intelligent giant magnetostrictive actuator (GMA). It combined adaptive control with dynamic matrix control; parameters of predictive controller was real-time adjusted by online distinguishing to enhance the robustness of the control algorithm. On this basis, a correction control algorithm is also designed to regulate the parameters of predictive controller based on the step response of a controlled objective. Finally, the simulation results show that the proposed control strategy can adjust the running attitudes of high-speed trains under strong crosswind conditions; they also indicate that the new active control strategy is effective and applicable in improving the safety performance of a train based on a host–target computer technology provided by Matlab/Simulink. 相似文献
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超磁致伸缩致动器的输出性能主要取决于致动器内部磁场分布特性,进行致动器的磁场数值分析,对预估致动器工作性能参数具有重要的意义.文中利用有限元法进行了致动器的磁场分析,并根据磁场分析结果预估了超磁致伸缩致动器静态位移特性.实际测试了致动器的静态特性.实验结果表明所建立的有限元模型及分析方法是合理的. 相似文献
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针对超磁致精密驱动器(GMA)工作时因电磁线圈发热而导致GMA定位精度差的问题,采用体积小、噪声低、无电磁干扰的压电微泵驱动水流进行散热,以控制超磁致伸棒的温度.制作了一台GMA样机,设计了一个热变形测试系统,进行了GMA在无水冷和有水冷条件下的热变形对比实验.结果表明,提出的温控措施是有效的. 相似文献
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