2011 HiMCM A题特等奖学生论文下载3307

2011 HiMCM A题特等奖学生论文下载3307

 

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论文摘要如下：

 

1 Problem Statement

In this problem, we were asked to create a plan for maintaining the International Space Station for the next 10 years.Because the final United States Space Shuttle has landed, we need to find transportation from other sources, such as other countries and companies. We carried out this problem from NASA’s perspective, because although this was not explicitly stated, it seemed reasonable to approach the problem in this manner because of the background information provided.

2 Assumptions and Reasoning

1. The plan with Russia to purchase seats on the Soyuz can continue past the ending date of the contract in 2017 and until 2022. We assume this because it is a mutually beneficial deal for the United States and the Russians. If not for letting the United States buy seats on their shuttles, Russia would not be able to support trips to the International Space Station at their current frequency due to the cost of sending people into space.

2. The United States inflation rate will not pass above 6.2 percent in the next 10 years. We assume this because in the past 30 years, it has not passed above that level, and in the past 100 years, when it has gone above that level, it has not stayed there for more than 2 or 3 years, giving it less of a total impact. Essentially, the inflation rate would not stay above 6.2% for a full 10 years. By assuming that the inflation rate will be higher than it likely will be, it will give us a cushion of extra funds to use in the program.

3. The United States inflation rate will directly affect the cost of of the ISS program. This is a safe assumption, as the value of goods tends to remain relatively stable even when the value of the money that is used on those goods is not.

4. For the basic flight schedule we assumed that NASA would not make any major adjustments to their planned schedule. The basic flight schedule, which will be shown in greater detail below, follows a general pattern of sending people up once every six months. It would be irrational to predict a change in this pattern.

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