高压曲轴连杆式低速大转矩液压马达滑靴副设计方法

介绍了一种采用静压支承的曲轴连杆式低速大转矩液压马达滑靴副的高压化设计方法.与传统的静压支承结构相比,增加了油室面积以保证液压马达启动时油膜的形成,采用合适直径的阻尼孔以补偿粘温效应.通过数值求解雷诺方程的方法对油膜形成过程进行了仿真,并通过试验证明了该设计方法是有效的.     

Correlation Dimension in Fault Diagnosis of 600 MW Steam Turbine Generator

GP algorithm of correlation dimension computation is ameliorated which overcomes the shortage of traditional one. Improved process of GP algorithm takes the influence of temporal correlative pairs of points on correlation dimension into account and promotes the computational efficiency prominently. Iterative SVD method is applied to remove the influence of noise on the result of correlation dimension. The faults of steam flow turbulence and oil film disturbance which occur in 600MW Steam Turbine Generator are analyzed and whose correlation dimensions are computed. More distinct quantitative index than FFT is gained to distinguish two faults and it‘s of little importance to apply correlation dimension to study the influence of various factors on steam flow turbulence fault for nonexistence of convergent floor in correlation integral curve, which presents a new way to learn the operational function of large capacity steam turbine generator and carry out comprehensive condition monitoring.     

基于FPGA的嵌入式系统在灵巧手中的应用

研究了一种基于FPGA和NIOSⅡ双核处理器结构的控制系统,这种系统在结构上更为紧凑的同时,性能更为完善,并将其应用在新一代仿人灵巧手中.系统将算法计算处理和通信任务处理使用两个NIOSⅡ软核分开处理,提高了系统性能,并实现了单个芯片完成系统控制模块,多任务环境,以太网接口及TCP/IP协议栈,CAN、高速串行通信等功能.     

基于永磁直线电机引线键合系统的设计

在新型的引线键合系统中,针对引线键合过程运行在高速、高加速条件下和包含两种不同的运动状态,考虑到系统的柔性和变形,建立直线机构两种不同状态下的数学模型.根据引线键合工艺所能提供的条件,提出力、位转切控制的方法:在自由运动状态,实现了柔性结构下键合弧线的跟踪控制;在约束运动中,实现了精确的主动式键合力反馈控制.并讨论了这种控制策略的稳定性,实验结果证明了直线式机构和转切控制的策略适用于引线键合技术发展的要求.