针对以太阳能和锂电池为能源、以无刷直流电机为推进装置的双推进双体游览船舶,论文通过对双体船受力分析,依据船舶运动建模方法,建立船舶在舵失效情况下的运动仿真模型。通过检测左右舷螺旋桨的转速,实时计算双桨转速差产生的等效舵效值,并给出合适的转速控制值。最后,以实船数据为依据进行舵失效情况下的船舶操纵控制策略优化,并进行系统仿真;仿真结果表明,论文提出的控制策略有效实用,提高了船舶操纵控制性能以及安全性能。

深水铺管起重船"海洋石油201"是我国首艘DP3级动力定位工程船舶。论文从项目管理和建造过程出发,以实践为基础,重点介绍主推进器的组成、功能、特点以及主推进器安装工艺技术和安装管理要点,为今后类似大型主推进器的安装管理提供了重要参考。

No abstract available.

Space radiation effects mitigation has been identified as one of the highest priority technology development areas for human space flight in the NASA Strategic Space Technology Investment Plan (Dec. 2012). In this paper we review the special features of space radiation that lead to severe constraints on long-term (more than 180 days) human flight operations outside Earth's magnetosphere. We then quantify the impacts of human space radiation dose limits on spacecraft engineering design and development, flight program architecture, as well as flight program schedule and cost. A new Deep Space Habitat (DSH) concept, the hybrid inflatable habitat, is presented and shown to enable a flexible, affordable approach to long term manned interplanetary flight today.