August 23, 2006
Moments of Inertia�
Uninhabited Aerial Vehicle (UAV) �Dryden Remotely Operated Integrated Drone (DROID) �
Presented by Helida C. Haro�August 5, 2010
https://ntrs.nasa.gov/search.jsp?R=20110008320 2019-12-30T06:59:59+00:00Z
Agenda
Personal Background Research
Importance Measure, Weight, CG Design Hardware and Test Machining Hangar Safety Mitigations Critical Design Review (CDR) Tech Brief Test Analyze Data
Lessons Learned Future Plans Questions
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Personal Background
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CSUN Applied Mathematics Master Student
CA Mathematics Council Member
CSUN Mathematics Club Member
National Science Foundation Scholarship Recipient
NASA Intern
Research
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Mass Properties
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Themasspropertiesofanobjectaresimplytheproportionalityconstantsbetweenappliedforceandtheresultingacceleration:
ThisisNewton’s2ndlawfor1DegreeofFreedom(DOF)translationandrotation,respectively
Whenexpandedto6DOF:CGinformation
InertiaTensorMass
6DOFforce 6DOF
acceleration
Importance
The inertial characteristics have direct consequences on:
Aerodynamics Propulsion Structures Control
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Measure and Weight
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Design
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Manufacturing
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Shuttle Hangar
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Safety
Human Hazard Analysis Loss of Asset/Mission Hazard Analysis
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Approvals
Critical Design Review (CDR) Tech Brief
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Testing
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Data Analysis
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Time Constraints Basic Geometric Shapes MATLAB Error
Lessons Learned
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Dryden vs. Disneyland Learning Team Effort Double check all work Stress Testing Use steel instead of aluminum
Future Plans
GSRP at NASA Headquarters Graduate Work for NASA
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Questions?
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Mark, Chris, Aaron, Lesli, Stephanie, Alex, and Helida All photos provided by: NASA photographer, Thomas P. Tschida and INSPIRE Team
UAVSAR Longitudinal Center of Gravity and Yaw Inertia TRR & CLR 18 of 10
BACK-UP: Inertia Calculations
Where, I = Yaw Mass Moment of Inertia, [lb-in2] g = gravity, [in/sec2] d = Distance Between Cables, [in] l = Cable Length, [in] T = Period of Oscillation, [sec] W = Weight, [lb]
Reference: NACA TN No.351
Pod
l
Rig
d