MEPMEP(Martian Environmental Pod)(Martian Environmental Pod)

3/15/2004

Aerospace Engineering Department

University of Colorado-Boulder

Interim Review #2

Request for ActionRequest for Action

RFA Author Solution

Cannot weld aluminum shaft to petals

Palo •Key the aluminum shaft and aluminum sleeve

•No welding near acrylic parts

x 10

Electronics Package

Platform

Mounting Box

Greenhouse

Thermal Petals

Design ChangesDesign Changes

• Greenhouse/Pressure System– Molding tool design

• Thermal Shield/Structure– Keyed aluminum shaft and aluminum sleeve– New assembly order

• Electronics/Software– Trimpot

Molding ToolMolding Tool

• New design allows for the use of a furnace instead of internal heater

• Shelled out to reduce heating time

• Rolling method is done by hand on top of grooved plate

Keyed Shaft and SleeveKeyed Shaft and Sleeve

• Keyed aluminum shaft to eliminate the need for welding

• Key– 0.1’’ x 0.2’’ x 0.3’’

• Aluminum shaft– Depth: 0.1’’

• Aluminum sleeve– Depth: 0.2’’

New Assembly OrderNew Assembly Order

Greenhouse/Pressure SystemGreenhouse/Pressure System

• Molding tool is complete

• Tested for functionality:– Control valve

– Regulator and CO2 tank

Thermal Shield/StructureThermal Shield/Structure

• Completed petals 1 - 5 using new epoxy

• Machined parts for petals 6 - 10

• Machined electronics box parts

Electronic SetupElectronic Setup

Software SetupSoftware Setup

Software SetupSoftware Setup

Electronics TestingElectronics Testing

• Verified functional operation of:– Pressure transducer– Thermistor– Determined conversion coefficient– LabView

Current IssuesCurrent Issues

• Laser cutter availability/reliability– Solution: sand edges for even mating surface

• Outdoor testing

-Solution: car inverter for power supply and data acquisition system

To Be Completed: To Be Completed: Greenhouse/Pressure SystemGreenhouse/Pressure System

• Molding plate (3/19/04)

• Shape Kapton for deployable greenhouse (3/31/04)

• Construct greenhouse around acrylic rings (4/2/04)

To Be Completed: To Be Completed: Thermal Shield/StructureThermal Shield/Structure

• Finish constructing thermal shield (3/19/04)

• Machine and construct base structure (3/28/04)

• Machine aluminum shaft and sleeve (3/31/04)

To Be Completed: ElectronicsTo Be Completed: Electronics

• Integration of Trimpot (3/28/04)

• Finish Circuit (4/2/04)– Copper Custom Plate

IntegrationIntegration

• Fasten greenhouse to mounting box

(3/28 – 3/31)

• Assemble final structure (3/28 – 4/2)

• Integrate pressure and power sources with electronics package (3/28 – 4/2)

Schedule ProgressSchedule Progress

Date Company PartsPhone Number Amount

12/15/2003 Kinko's copies   $207.94

12/15/2003 Kinko's copies   $19.20

12/17/2003 Colorado Plastic Products Inc. acrylic, epoxy 303-443-9271 $10.67

1/15/2004 R.S. Hughes Company Inc. epoxy 303-371-9440 $33.30

1/20/2004 Omega Engineering Inc.thermistor, pressure

transducer 203-359-1660 $114.35

1/21/2004 Maxon Precision Motors Inc. motors, gearboxes 650-697-9614 $348.27

1/22/2004 R.S. Hughes Company Inc. epoxy gun, mixing nozzles 303-371-9440 $62.93

1/27/2004 American Durafilm Kapton 508-429-8000 $163.08

1/28/2004 McGunkin Hardware Inc. clamps, aluminum rods, key 303-443-1822 $62.47

1/28/2004 Colorado Plastic Products Inc. acrylic 303-443-9271 $10.32

1/28/2004 R.S. Hughes Company Inc. mixing nozzles 303-371-9440 $47.90

1/28/2004 The Lee Company control valve 860-399-6281 $0.00

1/30/2004 Radio Shack electronics   $30.84

1/31/2004 Radio Shack electronics   $54.54

1/31/2004 Fistell's relay switch   $30.40

2/9/2004 Colorado Plastic Products Inc. acrylic 303-443-9271 $42.00

2/12/2004 The Beverage Factory carbon dioxide tank   $109.90

2/25/2004 McGunkin Hardware Inc. clamps, gas line   $117.56

3/1/2004 Colorado Plastic Products Inc. acrylic   $20.50

3/10/2004 Hobbytown USA Inc. CA glue   $46.37

Total:$1,532

.54

Questions?Questions?