 |
SAMS-II is a distributed system of sensors, currently on board the ISS,
SAMS-II has two sensors located in the USLab, two sensors in the
JEM, one
sensor in the COF, one sensor attached to the CIR, and one sensor
in the MSG facility.
SAMS-II Status
September 29, 2010 – SAMS measured the
microgravity environment for the NASA Glenn Research materials science
experiment Coarsening in Solid Liquid Mixures-2 Reflight(CSLM-2R)
during operations within the Microgravity Science Glovebox (MSG).
The CSLM-2R experiment operated during Increment 23/24 and the SAMS
sensor Triaxial Sensor Head-Ethernet Standalone (TSH-ES) located in
MSG provided acceleration data to the Principal Investigator.
Overview
SAMS-II measures vibrations and transient acceleration
disturbances resulting from ISS vehicle activities, ISS systems operations,
experiment operations, crew movements, and ISS structure thermal expansion
and contraction. SAMS Remote Triaxial Sensor (RTS) systems are used
to monitor on-board ISS accelerations for individual experiments requiring
direct acceleration measurement support. Each RTS is capable of measuring
acceleration disturbances between 0.01 Hz and 400 Hz. This aggregate
set of acceleration disturbances is commonly referred to g-jitter.
Each RTSs consist of two components: the RTS sensor enclosure (SE)
and the RTS electronics enclosure (EE). The RTS-SE, placed as close
to the experiment as possible, translates the g-jitter into a digital
signal. The RTS-EEs provides power and command signals for up to 2
RTS-SEs and receives the g-jitter data from the RTS-SEs.
An additional sensor called the RTS Ethernet Standalone (RTS-ES) is available
for acceleration measurement support. The RTS-ES is just that, a sensor
capable of making acceleration measurements in a standalone fashion; the RTS-ES
does not require an RTS-EE to function.
All SAMS RTSs are linked together by the Interim Control Unit (ICU), which coordinates
the command and telemetry data for the various RTS systems being used throughout
the Station. All acceleration data obtained by each SAMS RTS are routed
to the ICU for downlink to the ground. All command and control for each
RTS is accomplished through the ICU. The main component of the ICU is a laptop
computer. Once the ICU receives the measurements from the RTS systems, it checks
the data for completeness, breaks the data into well-defined information packets,
and sends the packets to the SAMS Ground Operations Equipment located at the
Telescience Support Center (TSC) at Glenn Research Center.
Related Web Sites
* Principal
Investigator Microgravity Services (PIMS) Results Home Page
* NASA Glenn Research Center - SAMS
* NASA Glenn Research Center - MAMS
|
|
|
|
Publications
& Presentations 