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Structure Design HW #2

Structure Design HW #2. 祝飛鴻 12/12/2008. Concept of Process. “Process” is a step-by-step planning in resolution of problems with identified inter-relation and sequence between the steps. When facing problems, the common mistake is to

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Structure Design HW #2

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  1. Structure Design HW #2 祝飛鴻 12/12/2008

  2. Concept of Process • “Process” is a step-by-step planning in resolution of problemswith identified inter-relation and sequence between the steps. • When facing problems, the common mistake is to immediately jump into the execution details without an overall, from beginning to end, problem solving “process”. • Depends on the situation, the “process” may not need to be in detail to start with. The “process” can be modified or enhanced during execution.

  3. Concept of Process • Without a proper pre-defined “process”, most likely, it will lead to lengthy iteration in solving problems. • The “process” can also be used to align all the involved parties to work with the same pace. This is extremely important for large scale projects, e.g. satellite design. • “Process” can be presented as flow chart with waterfall concept, i.e. top down from coarse to detail.

  4. Structure Design HW #2 Q: Generate a detail flow chart for spacecraft structure design, from requirements to verification. Following chart provide a typical process related to the spacecraft structure design. It is not intended to be a standard solution, but rather to be a reference information for the homework problem.

  5. Waterfall Structure Spacecraft Structure Design Level 1 Requirements & Constraints Design & Analysis Verification & Validation Level 2 Mission Driven Configuration Design Verification Plan System Driven Level 3 Stress Analysis Test Plan LV Driven Dynamic Analysis Test Procedures Lift-off wt Level 4 Fairing Size Special Analysis Launch Loads Acoustic Loads Shock Loads Level 5 Random Loads Quasi-static Loads

  6. Mission Requirements System Requirements Component Selection Conceptual Design Wt & Size FOV Orientation Mission Orbit Target wt & Size Material Selection Candidate LV Preliminary Sizing Launch Loads Wt Limitation Fairing Size Configuration Design Stress Analysis Finite Element Model Min Freq Reqt Dynamic Analysis Test Plan & Procedures Environmental Test Coupled Loads Results Verification Plan Design Verification

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