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Project Definition

Goal

Our project goal is to design a descent probe for NASA that will maintain structural, aerodynamic, and thermal integrity from 100,000 feet to the surface, and survive impact.  The team will design, build, test, and implement a data acquisition and data storage system.  All data will be time-tagged, buffered, and stored in format suitable for telemetry to ground.  The team will use the data collected to "reconstruct the atmosphere" -- creating a pressure and temperature profile of the atmosphere for a given altitude. 

Needs

Physical Requirements:

-         aerodynamic stability of the probe

-         structural integrity

-         mass and size requirements- light and small

-    parachute deployment system

-    30-60 sec free-fall or as long as possible

-    mathematical model of flight

Electronics:

-         data acquisition

              a. sampling rate- 10-100 Hz

              b. resolution

              c. signal quality

              d. capability to acquire acceleration and  orientation of capsule- in three directions

-   power source efficiency

-   sensors

         a. three-axis accelerometers

         b. gyroscopes

         c. magnetometers

         d. horizon sensor

         e. pressure sensors

         f. internal and external temperature         sensors/ thermocouples

 

Specifications

bulletStructural/Instrumentation
bulletDetailed

 

 

 

Project Deliverables

bulletInstrumented Descent Probe
bulletFinal Report
bulletDesign Documentation
bulletResearch Documentation
bulletTeam Progress Documentation
bulletPresentation at Engineering Expo
bulletTeam Website

 

 

 

 

Constraints

Regulation:

a.  FAA regulations

         - size to weight capsule ratio

         - weight of capsule

         - balloon must fly in non-military zones

 b. Client needs

         - lightest weight possible

         - smallest size possible

         - required sensors

         - telecommunications

 

Atmospheric:

 

a. Low temperature

          - affects internal instruments

 b. Decreasing pressure   

           - affects max. altitude of  balloon

c. Winds determine ability of weather balloon to fly    

d. Acceleration determines length of capsule free fall                     

 

 Structural/Electronic:

 

a. size of capsule

b. weight of capsule

c. memory space of Basic Stamp microcontroller

            - determines amount of instruments that measure data in real time

             - determines data rates sent in real time

d. Power for equipment

e. Money for best possible electronic instruments and structural materials 

           

 

 

 

 

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Last updated: 05/10/06.