摘要：A single gimbal control moment gyro system is the best choice for large spacecraft attitude control systems, as executive components of spacecraft guidance, navigation, and control system. But the phenomenon of singularity exists in this system. This increases the difficulty in designing the steering law. Singularity of SGCMG system is analyzed in this paper. The singularity measurement is determined making use of a fuzzy decision. A singularity avoidance steering law of large spacecraft SGCMG system based on fuzzy decision is designed according to the idea of searching the singularity measurement's gradient. The simulation experiments show this method guarantees singularity avoidance of SGCMG system. This method provides a new idea for the steering law of large spacecraft.

摘要：以steering技术为基础,使用Pathfinder建立客船人员疏散仿真模型,利用“SAFEGUARD”项目中验证数据进行模型验证。由于“SAFEGUARD”项目中人员年龄、速度、路径等参数未知,基于合理假设条件和参数设置,对模型中人员疏散路径以及疏散时间进行仿真测试,并对测试结果进行适用性验证。实验结果表明,本文建立的疏散模型符合IMO相关标准,可为客船舱室设计以及疏散方案设计和优化提供支持。

摘要：这款采用“人性化设计理念”制成的车把手柄，系以“集海绵手柄减震以及硅有机树脂制手柄经久耐用等多种特性于一身”，为其最大“亮点”。ESI车把手柄（每副）零售价现定为15．28美元。

摘要：为了对控制系统稳定性能和扰动隔离能力进行分析,对二级稳定系统进行了建模和控制器设计,仿真结果显示,系统速率稳定回路带宽提升至200Hz,1Hz位置隔离度提升至-90.1dB。在实际系统中,采用位置敏感探测器(PSD)测量瞄准线的运动,隔离度测试实验结果显示1Hz位置隔离度提升至-73.1dB,提升约20dB,测试结果证明:二级稳定技术能够显著提高系统的稳定精度。

摘要：近日,网络无线通讯设备供应商Ruckus Wireless在京召开题为"‘真正无线’--Ruckus Wireless开启企业无线局域网新纪元"的新闻发布会,宣布其正式进入中国市场。在发布会上,Ruckus Wireless推出具备了Wi-Fi全新概念的无线多媒体系统ZoneFlex系列产品。