space power systems
DESCRIPTION
TRANSCRIPT
Register online at www.ATIcourses.com or call ATI at 888.501.2100 or 410.956.8805 Vol. 96 – 21
February 23-27, 2009Beltsville, Maryland
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SummaryThis multi-disciplinary course provides a complete
summary of the technologies needed to understand anddevelop spacecraft systems and instrumentation. Thecourse presents a systems engineering approach forunderstanding the design and testing of spacecraftsystems. The course highlights the underlying scientificand engineering foundations needed to develop spacesystems, as well as current practices. Case studies areused to pinpoint the key issues and trade-offs in moderndesign, and to illustrate the lessons learned from pastsuccesses and failures.
This course provides a strong technical base forleadership in systems engineering or the management ofspace systems. Technical specialists will find the broadperspective and knowledge useful in communicating withother space system specialists in analyzing design optionsand trade-offs.
The emphasis will be on how today's technology isincorporated into the planning, designing, fabrication,integration, and testing of modern space systems. Eachparticipant will receive a complete set of notes and theaward-winning textbook Space Systems written by theinstructors. The textbook and course notes provide anauthoritative reference that focuses on proven techniquesand guidelines for understanding, designing, andmanaging modern space systems.
Instructors Dr. Vincent L. Pisacane is a fellow of the AIAA, and is
the R.A. Heinlein Professor of AerospaceEngineering at the United States NavalAcademy. He was formerly Head of theAPL Space Department. He has 35 yearsof experience in space research and thedevelopment of spacecraft andinstrumentation. He is the editor of thetextbook Space Systems published by
Oxford Press.Dr. Mark E. Pittelkau is president of Aerospace
ControlSystems Engineering and Research(www.ascinnovations.com). His experience in satellitesystems includes the design, implementation, and testingof orbit determination algorithms, attitude determination,and control systems. His current work in attitude controlsystems includes control-structure interaction, pointingjitter and stability analysis, concept studies for variousattitude control systems, and sensor alignment calibration.
Jay Jenkins is a power system engineer at JHU/APLwith 15 years of experience in design and analysis ofaerospace power systems with an emphasis on batteryand solar array technology.
William E. Skullney is Supervisor of the MechanicalSystems Group at JHU/APL and has over 20 yearsexperience in the design, analysis and testing ofspacecraft mechanical systems. He specializes instructural engineering and analysis and has led structuralengineering efforts for the Delta 180 series programs andthe Midcourse Space Experiment Program.
Clarence Wingate has 35 years of space experienceand specializes in the thermal design, analysis and testingof spacecraft. He is retired from JHU/APL.
Course Outline1. Space Systems Engineering. Fundamentals of
systems engineering. System development process.Engineering reviews. Management of space systems.
2. Orbital Mechanics. Fundamentals of dynamics.Reference frames. Time. Two-body central forcemotion. Two-body problem. Trajectory perturbations.Orbit determination. Interplanetary missions andpatched conics.
3. Spacecraft Propulsion/Rocket Propulsion.Force-free rocket motion. Rocket motion with gravity.Launch flight mechanics. Transfer trajectories.
4. Flight Mechanics and Launch Systems.Hohman transfer orbits. Reaching a target orbit. Solidand liquid propellant systems. Other propulsionsystems. Selected launch systems.
5. Spacecraft Attitude Determination. Attitudesensors and kinematics. Attitude determinationsystems. Attitude estimation and system identification.Attitude error specification and analysis. Missionexperiences.
6. Spacecraft Attitude Control. Rotationaldynamics and environmental disturbance torques.Attitude actuators. Passive and active attitude controlmethods. Attitude controllers and stability. Missionexperiences.
7. Configuration and Structural Design.Structural design requirements and interfaces.Requirements for launch, staging, spin stabilizationstages. Acoustics, acceleration, transients and shock.Designing and testing. Stress-strain analysis. Marginsof safety. Finite Element Analysis. Structural dynamics.Testing.
8. Space Power Systems. Energy storage,distribution, and control. Environmental effects on solarcells. Orbital considerations. Energy converters. Solarcells and solar arrays. Batteries and energy storage.Characteristics of different batteries. Strong emphasison translating mission requirements into a powersystem design.
9. Space Thermal Control. Radiation and thermalfundamentals. Heat transfer and energy balance.Choice of thermal materials. The thermal design andtesting process.
Space Systems - Intermediate Design
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2Space Systems I - Power Systems Summary
Course Overview
• Provides end-to-end synopsis of space power systems– Power strategies for mission duration and destination
• Solar and Nuclear Power Sources– Review of orbital mechanics and space environment – Solar Array considerations– Radioisotope Thermoelectric Generator basics
• Energy Storage Technologies– Provides overview of available battery cell technologies
• Power Control electronics options are covered• Power Systems for current missions are presented
3Space Systems I - Power Systems Summary
Application Range of Power Sources100
10
1
Load Power
kW
Time Hours0.1 1.0 10 103 105100 104 106
1Day1Day 1Mo.1Mo. 1Yr.1Yr. 100Yr.100Yr.10Yr.10Yr.
.1
PrimaryBatteries
FuelCell
ChemicalDynamicAPUs*
Nuclear ReactorDynamic/Thermoelectric
Photovoltaicor
RadioisotopeThermoelectric
Generators
After Chetty, 1988*APU = Auxiliary Power Unit
4Space Systems I - Power Systems Summary
Limits of Solar Power
5Space Systems I - Power Systems Summary
Annual Earth Sun Positions
Mars: 2.17 x 108 Km
6Space Systems I - Power Systems Summary
Earth’s Radiation Belts
11 Year Solar Cycle: Peak 12/2001, Minimum 2007
7Space Systems I - Power Systems Summary
Solar Spectral Irradiance Vs Wavelength (AM0 Solar Constant)
American SocietyTesting & Materials (1999) 136.6 W/cm2
Mars 58.86 W/cm2
8Space Systems I - Power Systems Summary
Triple-junction Solar CellCross Section & Quantum Efficiencies
Spectrolab 3JBottom cell:
long wavelengthsTop cell:
short wavelengths
Middle cell
9Space Systems I - Power Systems Summary
GPHS RTG Cross Section
10Space Systems I - Power Systems Summary
Electrochemical Operation of a Cell(Discharge)
11Space Systems I - Power Systems Summary
Space Station NiH2 Battery
12Space Systems I - Power Systems Summary
MER Power Functional Block Diagram
Rover SolarArray Panel (x6)
Rover SolarArray
Cruise Shunt LimiterAssembly(5 Stages)
CruiseShunt
Radiator1/2 Panel
CruisePower
DistributionUnit
LOADS
CRUISESTAGE
Rover Shunt LimiterUnit
(2 Stages)
Rover SolarArray
Rover SolarArray
Rover SolarArray
Rover SolarArray Panel (x6)
RoverPower
DistributionUnit
LOADSRoverBatteryControlBoard
RoverPower
ConverterUnit
VME Loads
IMU, Cameras
LanderPowerControl
Unit
Lander PyroSwitchingAssembly
LanderPower
DistributionUnit
ROVERSTAGE
LANDERSTAGE
LOADS
BACKSHELLSTAGE
LiSo2Batteries
(x5)
Li-IonBatteries
(x2)
RoverShunt
Radiator
Umbilical to LCE
T
(x5)
(x2)
T
Lander PyroSwitchingInterface
Cruise Solar Array (4 Panels)
1/2 Panel
CruisePower
ConverterUnit
Pyro Bus A
Pyro Bus B
RADAR ALTIMETER
Rover PyroSwitchingAssembly
ThermalBattery
(x2)
Backshell PyroSwitchingAssembly
LANDER PYRO LOADS
BACkSHELL PYROLOADS
ROVER PYRO LOADS
CRUISE PYRO LOADS
Vc
IMU PCU
LightningSuppression
Assembly
dgn- 2/1/02
Boost Your Skillswith On-Site CoursesTailored to Your NeedsThe Applied Technology Institute specializes in training programs for technical
professionals. Our courses keep you current in the state-of-the-art technology that isessential to keep your company on the cutting edge in today’s highly competitivemarketplace. For 20 years, we have earned the trust of training departments nationwide,and have presented on-site training at the major Navy, Air Force and NASA centers, and for alarge number of contractors. Our training increases effectiveness and productivity. Learnfrom the proven best.
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I suggest that you read through these course descriptions and then call me personally, JimJenkins, at (410) 531-6034, and I’ll explain what we can do for you, what it will cost, and whatyou can expect in results and future capabilities.
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