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DemoSat IIColorado Space Grant Consortium
Design (EPICS) DivisionColorado School of MinesGolden Colorado [email protected]
Critical Design Review
April 2, 2004
CSM Mission Landing site imaging
DescentSat Video mechanism
TXSat Radio transmission mechanism
LandSat Up-right mechanism
RoverSat Rover mechanism Video mechanism
Project Project GoalsGoals
to gather visual images and pictures as the satellite approaches the landing site.
to initiate research supporting future missions to the lunar surface.
to explore the design issues and imagery necessary to select a landing site.
Project Project DemographicsDemographics
SpecificationSpecification ValueValue
ProjectProjectStudentsStudents 1515
TeamsTeams 33
SystemSystemWeightWeight 1.5kg1.5kg
CostCost $1,500.00$1,500.00
TetherTether 2.5mm2.5mm
LaunchLaunch August 7August 7
Potential SatsDescentSat
LandSatRoverSat
Landing Site Satellites
The purpose of the Landing Site Sats is to gather data and
information support the selection of a landing site on other moons or
planets.
StorageStorage Transmission
Location
Impact
Visual Images
Orientation &Mobility
Power
data
conditions
conditions
conditions
conditions
energy
General Subsystem DiagramLanding Site Sat
Subsystem Subsystem ExamplesExamples Video cameraVideo camera Radio transmissionRadio transmission Orientation Orientation
mechanismmechanism Ramp deploymentRamp deployment RoverRover Remote controllerRemote controller BrainStem controllerBrainStem controller Power supplyPower supply
TEAM U. D. C.TEAM U. D. C.
-JACOB KIRKLEYJACOB KIRKLEY-DAN ALLENDAN ALLEN
-NATHAN SKITTNATHAN SKITT-ZAC SELFZAC SELF
Satellite Satellite SubsystemsSubsystems
MOTOR & GEARINGMOTOR & GEARING
TRACK SYSTEM & CHASSISTRACK SYSTEM & CHASSIS
COMMUNICATION SYSTEMSCOMMUNICATION SYSTEMS
SATELLITE HOUSINGSATELLITE HOUSING
Subsystem Subsystem DescriptionDescription
MOTOR & GEARINGMOTOR & GEARING– Two motors will be used to drive the rovor.Two motors will be used to drive the rovor.– Each motor will be connected directly by gears to the Each motor will be connected directly by gears to the
wheels.wheels.
COST & WEIGHTCOST & WEIGHTWeight of motor - 50 – 100 grams of weight.Weight of motor - 50 – 100 grams of weight.
Cost of each motor – $50.Cost of each motor – $50.
Weight of gears (total) – 20 grams.Weight of gears (total) – 20 grams.
Cost of gears (total) – $10.Cost of gears (total) – $10.
Track System & Track System & ChassisChassis
Made from Aluminum Channel, aluminum angle, and Made from Aluminum Channel, aluminum angle, and small nuts and bolts.small nuts and bolts.
Wheels for track system made from R/C car wheels.Wheels for track system made from R/C car wheels.
Track made from rubber.Track made from rubber.
““L” shaped brackets to hold motors.L” shaped brackets to hold motors.
Tracks in a Triangle shape.Tracks in a Triangle shape.
Chassis made from Al angle open on bottom.Chassis made from Al angle open on bottom.
Cost: $30-50Cost: $30-50
Weight: Approx. 350-400 gramsWeight: Approx. 350-400 grams
Communications SystemsCommunications Systems
Onboard video camera.Onboard video camera.
Transmitter for the video receiver from the camera.Transmitter for the video receiver from the camera.
Remote control receiver with a 3 – 5 mile range.Remote control receiver with a 3 – 5 mile range.
Remote control.Remote control.
Two onboard 12-v batteries to run electronics.Two onboard 12-v batteries to run electronics.
A third battery for the motors.A third battery for the motors.
Brainstem to control all communication functions.Brainstem to control all communication functions.
Estimated total cost: $900 - $1200Estimated total cost: $900 - $1200
Estimated total weight: 400 – 500 grams.Estimated total weight: 400 – 500 grams.
Satellite HousingSatellite Housing
Basic pyramid designBasic pyramid design
Landing possibilitiesLanding possibilities
Solutions to deploymentSolutions to deployment
Attaching to tetherAttaching to tether
Breaking the boxBreaking the box
Will cost between $10 - $50Will cost between $10 - $50
BudgetBudget
PROPOSED EXPENSES: PROPOSED EXPENSES: (Approx.)(Approx.)– Motor and gearing: $110Motor and gearing: $110– Track System & Chassis: $50Track System & Chassis: $50– Communication Systems: $1200Communication Systems: $1200– Satellite Housing: $50Satellite Housing: $50
Total Expenses: $1410Total Expenses: $1410
Rover• Front suspension• Rear Suspension
Main Chassis • All main electrical components are contained on the
chassis• Has a rolled arch for added stiffness• Solar plate mounted on hinge above chassis for
cooling and light purposes
Case• Rectangular, rounded edges• Durable & easy to build
Camera • Mounted on front of rover for maximum visibility
System Description
Components Mass (g)Mass (g)
Tires (12grams X4)ChassisVideo TX Video AntennaRear end w/ motor CameraLi-POH batterySolar CellR/C system(receiver) R/C micro servo 1(steering) R/C servo 2(lever arm)Suspension. A-Arms(8g X4) Shock Tower
4848 2828 300300 6060 170170 130130 538538 280280 99 1818 4141 4242 1010
Total Weight 1692
Mass Budget
Structure
Up-Dow n Crash Team 2
M ission D irectorCSM
B ob Knecht
M ission Contro lU niversity of Colorado
Chris Keohler
Dem oSat I ICSGC
DemoSat Project Schedule
Project Management ScheduleProject: DemoSat II (Landing Site Selection) Manager: R. D. KnechtNumber: 04es7csg Date: January, 2004
Time Jan Feb Mar Apr May Jun Jul AugActivityI. System Design and Selection A. Identify needs/develop specifications Problem Definition Design Specification
Project Plan B. Define subsystems Analyze feasibility Estimate costs
Subsystem Review C. Complete system Construct and Test Subsystems Assemble and Test System Prepare Design Presentation
Satellite Selection
II. Design Refinement A. Mission readiness Upgrade System Environmental Testing
MRR B. Launch readiness
LRR