Modeling and control of the pulley buffer system of arresting cable for shipboard aircraft based on magneto-rheological fluid

Taking the MK7-3 of USA hydraulic buffer arresting device as the research subject, the dynamical model for the shipboard aircraft arresting system is established, and the magneto-rheological (MR) damper is applied to pulley shock absorbers for shipboard aircraft block system. Due to the effect of the MR damper has not been known completely and so far MR damper model has not been defined, we use a set of characteristic test of the MR damper, through the process of parameters identification, to establish the dynamical model for the MR damper based on the Bingham plastic model. Then, the fuzzy control rules are designed, the buffer control for the pulley buffer of shipboard aircrafts is completed in touchdown moment based on MR technology. Compared with blocking device of hydraulic pulley buffer in the same condition, the simulations results show that the proposed MR pulley buffer can effectively recognize the impact energy for shipboard block system and reduce the pull peak of arresting cable. It improves significantly safety during landing of the air vehicles and lowers the risk of accidents.     

哈局计算机售票系统的实施与设想

介绍了哈局计算机售票系统的实施情况、实施效果、实施经验、实施过程中解决的主要技术问题,以及系统发展设想。     

高校图书馆员绩效评价研究

为了合理、科学地评价图书馆员的工作业绩,根据图书馆员工作岗位职责,从德、能、勤、绩四个方面建立图书馆员绩效考核指标体系,采用未确知测度理论进行评价,以期能全面、系统、科学地对图书馆员进行绩效考核,实现图书馆员考核的科学化、制度化。     

铁路窗口售退票系统

为适应铁路快速发展要求,做好铁路大面积提速调图售票组织方面的准备工作,建成以市场需求为导向的客票销售体系,满足旅客多层次需求,实现客票销售渠道网络化、多样化,服务手段现代化,运营管理信息化的目标,铁道部组织研制了5.2版铁路客票窗口售退票系统(TRSv5.2系统)。