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The use of human modeling of EVA tasks as a systems engineering tool

机译:使用人类建模EVA任务作为系统工程工具

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Computer-generated human models have been used in aerospace design for more than a decade. They have come to be highly reliable for worksite analysis of certain types of EVA tasks. In many design environments, this analysis comes after the structural design is largely complete. However, the use of these models as a development tool is gaining acceptance within organizations that practice good systems engineering processes. The design of the United States Propulsion Module for the International Space Station provides an example of this application. The Propulsion Module will provide augmentation to the propulsion capability supplied by the Russian Service Module Zvezda. It is a late addition to the set of modules provided by the United States to the ISS Program, and as a result, faces design challenges that result from the level of immaturity of its integration into the Station. Among these are heat dissipation and physical envelopes. Since the rest of the Station was designed to maximize the use of the cooling system, little margin is available for the addition of another module. The Propulsion Module will attach at the forward end of the Station, and will be between the Orbiter and the rest of ISS. Since cargo must be removed from the Payload Bay and transferred to Station by the Canadarm, there is a potential for protrusions from the module, such as thruster booms, to interfere with robotic operations. These and similar engineering issues must be addressed as part of the development. In the implementation of good system design, all design solutions should be analyzed for compatibility with all affected subsystems. Human modeling has been used in this project to provide rapid input to system trades of design concepts. For example, the placement of radiators and avionics components for optimization of heat dissipation had to be examined for feasibility of EVA translation paths and worksite development. Likewise, the location of and mechanism for the retraction of thruster booms was partly driven by available Orbiter, robotic arm, and other module envelopes; worksite analysis was required for early assessment of task success. Since these trade studies included the EVA analysis as part of the decision criteria, the design had a high degree of assurance of EVA supportability from the outset. This approach contributes greatly to mission success.
机译:计算机生成的人体模特已经在航空航天设计已使用超过十年。他们来为某些类型的EVA的任务工地分析非常可靠。在许多设计环境中,这种分析而来的结构设计已基本完成后。但是,使用这些模型作为开发工具组织这种做法很好系统工程过程中获得认可。美国推进模块为国际空间站设计提供这种应用的一个例子。推进模块将提供增强到由俄罗斯服务模块红星供给的推进能力。这是一个晚除了一套由美国提供给国际空间站计划模块,作为结果,面临着来自其整合进站上车的不成熟的程度造成设计挑战。其中有散热和物理信封。由于站的其余部分被设计最大限度地利用了冷却系统,小保证金可用于增加另一个模块。推进模块将附加在车站的前端,而将轨道器和ISS的其余部分之间。由于货物必须从有效载荷舱被移除并且由Canadarm转移到车站,存在用于从所述模块的突起,如推进器悬臂的电位,用机械手操作干涉。这些以及类似的工程问题,必须作为发展的一部分加以解决。在良好的系统设计实施,所有设计方案进行分析与所有受影响的子系统兼容。人体模型已经在这个项目中被用来提供快速输入的设计理念,系统的交易。例如,散热器和航空电子部件散热的优化布局必须检查的EVA翻译路径和工地开发可行性。同样地,对推进器悬臂的缩回位置和机制可用的轨道器,机器人臂,和其他模块的信封被部分驱动;被要求为任务成功的早期评估工地分析。由于这些贸易研究包括EVA分析的决策标准部分,设计有高度从一开始就EVA保障的保证。这个方法大大促进了任务的成功。

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