Current Trends in Microgravity Science & Technology
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Outline

Current Trends in Microgravity Science & TechnologyGravity-Related Phenomena in Space ExplorationResearch and TechnologyThe NASA Glenn Acceleration Measurement ProjectsTwo Decades and Counting of Acceleration Measurement and SupportSAMS TeamKevin McPhersonJennifer KellerEric KellyKen Hrovat


Outline
Outline

Acronyms

Science support/customers

Highlights of a microgravity community feedback model

Timeline of acceleration system deployment

Location of acceleration sensor deployment

SAMS mission support

How much acceleration data?

Characterization of microgravity environment/events

Impacts on microgravity science

Moving forward


Outline1
Outline

Acronyms

Science support/customers

Highlights of a microgravity community feedback model

Timeline of acceleration system deployment

Location of acceleration sensor deployment

SAMS mission support

How much acceleration data?

Characterization of microgravity environment/events

Impacts on microgravity science

Moving forward


Science support customers
Science Support/Customers

  • NASA’s Physical Sciences Research Program conducts fundamental & applied research with experiments in various disciplines such as…

  • Fluid Physics

  • Combustion Science

  • Materials Science

  • Fundamental Physics

  • SAMS/MAMS were designed to support these various science disciplines and these instruments along with PIMS play an ongoing role in support of vehicle/loads monitoring

SOFBALL

  • collaboration

CIR

FIR

SODI

MEIS

DECLIC


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Outline

Acronyms

Science support/customers

Highlights of a microgravity community feedback model

Timeline of acceleration system deployment

Location of acceleration sensor deployment

SAMS mission support

How much acceleration data?

Characterization of microgravity environment/events

Impacts on microgravity science

Moving forward


Highlights of microgravity community feedback model
Highlights of Microgravity Community Feedback Model

  • HIGHLIGHTS

  • Real-Time Displays: http://pims.grc.nasa.gov/html/PIMS_ISS_plots.html

  • Acceleration Data Archive: http://pims.grc.nasa.gov/ftp/pad

  • Characterization Handbook: http://pims.grc.nasa.gov/handbook


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Outline

Acronyms

Science support/customers

Highlights of a microgravity community feedback model

Timeline of acceleration system deployment

Location of acceleration sensor deployment

SAMS mission support

How much acceleration data?

Characterization of microgravity environment/events

Impacts on microgravity science

Moving forward


Timeline of nasa grc system deployment
Timeline of NASA GRC System Deployment

SAMS TSH-ES (Compact Ethernet Standalone)

(0.01 to 400 Hz) Station Vibratory

SAMS RTS (Ethernet Distributed)

(0.01 to 400 Hz) Station Vibratory

MAMS HiRAP

(0.01 to 100 Hz) Station Vibratory

MAMS OSS

(DC to 1 Hz) Station Quasi-Steady

RRS (0.1 arc/s)

1 sounding rocket, 1 shuttle

TSH-FF (0.01 to 200 Hz)

3 sounding rocket, 2 shuttle

2012

YEAR



Location of nasa grc iss sensor deployment
Location of NASA GRC ISS Sensor Deployment

Collectively, SAMS & MAMS Sensors Have Been Mounted in 21 Unique Locations

PreviousCurrent


Outline

Current SAMS and MAMS Sensor Locations

SAMS

SE F02, MSG upper left seat track

SE F03, ER2 lower Z panel

SE F04, ER1 lower Z panel

SE F05, ER4 drawer 2

SE F08, ER3 seat track

TSH-ES05, CIR

TSH-ES06, FIR

MAMS

ER1


Sams mission support
SAMS Mission Support

2011 ISS

2012 ISS

This slide courtesy of Richard DeLombard


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Outline

Acronyms

Science support/customers

Highlights of a microgravity community feedback model

Timeline of acceleration system deployment

Location of acceleration sensor deployment

SAMS mission support

How much acceleration data?

Characterization of microgravity environment/events

Impacts on microgravity science

Moving forward


How much acceleration data
How Much Acceleration Data?

Since May of 2001 on the ISS, SAMS and MAMS have collected

~50% in Dec. of 2011 b/c this slide was made about mid-December

May 2001

~ today

Monthly % of Time Coverage


Outline5
Outline

Acronyms

Science support/customers

Highlights of a microgravity community feedback model

Timeline of acceleration system deployment

Location of acceleration sensor deployment

SAMS mission support

How much acceleration data?

Characterization of microgravity environment/events

Impacts on microgravity science

Moving forward


General characterization components of microgravity environment
General CharacterizationComponents of Microgravity Environment

1 g 

Acceleration (ug)

1 ug 

orbital effects

crew

pumps, fans, etc.

Frequency (Hz)


General characterization components of microgravity environment1
General CharacterizationComponents of Microgravity Environment


Basic characterization some components of shuttle environment

1

2

12 hours

Basic CharacterizationSome Components of Shuttle Environment

spectrogram: a roadmap that shows boundaries & structure in time & frequency

spectrogram: a roadmap that shows boundaries & structure in time & frequency


Summary characterization

LSLE refrigerator compressors

2

Antenna dither

Vehicle structural modes

1

WAKE

SLEEP

Centrifuge

Exercise

Summary Characterization

Principal Component Spectral Analysis serves to summarize acceleration spectrum

span > 15 days


Detail characterization iss
Detail Characterization ISS

initial contact

driving latches


Outline

Detail Characterization ISS

statistics for 24 reboost events

Reboost



Fatigue analysis iss1
Fatigue Analysis ISS

ISS structural dynamics info from Mike Laible (Boeing)

station structural modes


Device for the study of critical liquids and crystallization declic iss
DEvice for the study of Critical LIquids and Crystallization (DECLIC) ISS

Captured recent voice loop call regarding DECLIC turn off time, which resulted in the following handbook pages…

Quantify

Qualify


Marangoni experiment in space meis iss
Marangoni Experiment in Space (MEIS) ISS (DECLIC) ISS

Plot courtesy of Marcus Dejmek


Marangoni experiment in space meis iss1
Marangoni Experiment in Space (MEIS) ISS (DECLIC) ISS

Plot courtesy of Marcus Dejmek

~0.25 to ~0.27 Hz is

“front T moving back and forth”

[Mike Laible, JSC/Boeing]


Outline6
Outline (DECLIC) ISS

Acronyms

Science support/customers

Highlights of a microgravity community feedback model

Timeline of acceleration system deployment

Location of acceleration sensor deployment

SAMS mission support

How much acceleration data?

Characterization of microgravity environment/events

Impacts on microgravity science

Moving forward


Impacts on shuttle microgravity science
Impacts on Shuttle Microgravity Science (DECLIC) ISS

Near real-time support to investigators…

Example:

SOFBALL experiment sensitive to impulsive disturbances during execution of test points.

PIMS:

Correlate OARE data with SOFBALL science data.

Results:

SOFBALL team had justification needed to request periods of STS “free drift” (no thrusters) in order to conduct their experiment.


Impacts crew exercise shuttle
Impacts/Crew Exercise: Shuttle (DECLIC) ISS

2 spectral peaks arise from shoulder sway & pedaling rate with excitation of Shuttle structural modes @ 3.5 and 4.8 Hz


Impacts crew exercise iss
Impacts/Crew Exercise: ISS (DECLIC) ISS

The Combined Operational Load Bearing External Resistance Treadmill (COLBERT), technically named the Treadmill 2 (T2) derived from the Treadmill with Vibration Isolation Stabilization System (TVIS)


Moving forward
Moving Forward (DECLIC) ISS

Ongoing microgravity acceleration services are available for principal investigators, structural studies, sustaining engineering plus microgravity community at-large (JAXA, ESA, CSA, etc.)

SAMS has the ability to instrument and measure in all 3 laboratories (LAB, JPM, COL) for the vibratory regime

MAMS has the ability to measure quasi-steady acceleration and map to arbitrary locations on the ISS (rigid body assumed).


That sure was a lot to take in

…is probably what you’re thinking, what with 20 years of acceleration data measurement and all, but try not to sweat it…there’s more to come.

That sure was a lot to take in…