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HABET Engineering Team Training
Engineering Team Training
Welcome to Engineering Team Training.
This training is currently evolving and is not complete yet. Hopefully within the
next few weeks/months it will be completed and everything will be made
available to you. As the training is updated, it will be added to this presentation
so that you may view it.
Some of the links will go to blank pages, so don’t be concerned about that. The
Technical Modules that are done so far are: Lithium Battery String Assembly,
and Lead-Acid Battery Charging. The LSB-1 Module under Spacecraft types
also has some good information in it.
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Engineering Team Training
Background
Procedures
Technical Training
Spacecraft Bus Types
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Background
This training is meant to help you become a safe
and effective member of the HABET
Engineering team.
The Engineering team’s primary job is the
overall construction of flight spacecraft for every
HABET mission. This includes the construction
of the exterior “box”, the interconnection and
testing of the bus (LSB or HSB), and the
integration of any scientific or engineering
hardware being flown as a payload.
Their secondary job is to provide technical
support for the Launch Team to ensure a
successful launch and mission.
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Engineering Procedures
MIB Briefing
Spacecraft Bus Test Procedure (LSB-1)
MRR Checklist
Final Flight Assembly & Test
FRR Checklist
Engineering Launch Support
Post-Flight Spacecraft Check-In
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MIB Briefing
The Mission Initiation Board (MIB) is the first time that an actual mission purpose
will have been determined by the EMT. A MMGR for the specific mission will be
introduced at this time. Volunteers will be asked to fill the position of Launch,
Flight, Recovery, and Engineering Director.
At this time there will be a general statement about the purpose of the mission and
the Principal Investigator (PI) will give a brief description of the science or
engineering portion of the mission. The SSOL Engineering Projects Director will
briefly outline the capabilities of the spacecraft and any modifications or new
circuitry that must be made to accommodate the PI and the mission parameters.
After the MIB has been completed and an ED assigned, it will be the job of the
Engineering Team to implement the hardware necessary to make the flight a
success!
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Spacecraft Bus Test Procedure (LSB-1)
The Spacecraft Bus Test Procedure is
used to determine if the basic bus is
ready to be used for a mission.
This procedure will determine if all
functions of the LSB are performing
within normal parameters. It will
check for telemetry transmission, GPS
lock, pinhole video, etc. This is to
make sure that the particular bus
assigned to the mission is flight ready.
This procedure may be performed
anytime after the MIB, but MUST be
done before the MRR.
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HABET has five complete LSB-1’s.
One (and sometimes two) is always being
prepared for a mission. The third is used
exclusively for the AerE 265Xclass. The
fourth is used mostly for development
testing by the Engineering Team. The fifth
is currently being used by the RGS system.
The flight spares and development LSB-1’s
are stored in a locked cabinet above the
HABET workbench. Retrieve the LSB-1
that has been designated for your particular
mission. (You will need the HABET
Manager or the SSOL Engineer to open the
cabinet for you)
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Both battery strings should be measured
with a multimeter to ensure that the
charge they have left will be enough to
perform the tests necessary for this
procedure. The battery voltages should
be:
12 Volt - at least 11.5 Volts on the meter
9 Volt - at least 8.5 Volts on the meter
You will need to get a power source
for the LSB-1. There are old batteries
(from previous missions) kept on the
HABET workbench. These are
strictly for testing purposes. You will
need one 12 Volt battery and one 9
Volt battery to complete this
procedure.
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The test battery strings can now be
connected to the LSB-1. The power
connectors are on the bottom side of the
LSB-1 mainboard. The 12 Volt
connector is the two-pin 0.093 Molex
locking connector with red and black
wiring. The 9 Volt connector is a three
pin 0.062 Molex connector with blue and
black wiring. Each of these are unique,
so there is no way to install them in the
wrong spot or to reverse the wiring.
Once the wires are connected, push the
batteries against the velcro to hold them
in place.
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9 Volt
Connector
12 Volt
Connector
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Complete a visual inspection of of all
wiring harnesses and connectors at this
time.
- Check all the 12 Volt and 9 Volt
power connectors and wires to make
sure they are tight
- Check the serial connectors to the RS232 interface to make sure they are seated
properly
- Check the 5 Volt connections on the
regulator board to make sure they are
seated in their connectors properly
- Visually inspect the solder joints on the
MIM Module to ensure all of them are
making contact
- Check the connectors to the transceiver to
make sure they are tight
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Transceiver
connections
Solder Joints
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Dummy Load
Connect the output of the Transceiver
(BNC antenna connection) to the large
dummy load on the workbench. Use the
coaxial cable that is connected to the
dummy load. This will absorb the RF
radiation being transmitted, so that it will
be safe to work on the LSB-1 in the lab.
Connect the coaxial cable output of the
Emergency Radio Beacon to the coaxial
cable connected to the workbench VCR.
This will allow you to test the pinhole
camera video output to ensure proper
operation.
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Install the test set of reset
switches. This will allow
the LSB-1 to power-up
under external power
conditions and turn all of the
systems on (just as you
would during the preLaunch part of a mission).
External Power
Relay Harness
They can also be used to
reset the power to the LSB-1
any time during testing (after
disconnecting the external
power supply).
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Reset Switch Set
(Test Set)
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Locate the antenna cable for the GPS
antenna on the roof. It is located on the
RGS test bench (directly behind the
HABET test workbench). Carefully uncoil
the cable and stretch it over to the testing
area for the LSB-1.
GPS Antenna
Cable
Connect the antenna cable to the GPS
receiver on the LSB-1. Make sure the
connector is inserted fully to ensure proper
contact and good signal propagation to the
receiver.
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GPS Antenna
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12 Volt Power
Supply
Locate the 12 Volt Power Supply on the
RGS workbench. It is used to supply power
to the GPS antenna on the roof. Turn on the
power - the red LED on the Power Supply
should be on.
Check the black box directly above the
Power Supply. It is the unit that routes the
power up to the antenna. The green ‘LOCK’
indicator light should be on. This indicates
that the antenna is receiving power and
should be providing a GPS signal to the
receiver at this time.
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Lock Indicator
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12 Volt Lead-Acid
Battery
Connect a 12 Volt Lead-Acid battery to the
external power connector. HABET test
batteries are located on the workbench and
are usually kept fully charged.
Once the battery has been
connected, the cooling fan on the
Transceiver should be running.
This will be the only outward
sign that the system is on.
The next step will be to power
on the test equipment to verify
proper operation of all systems.
Power Connector
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Power-up the VCR on the workbench. It
should be set for channel 59 - if it is not - use
the remote to set the channel.
The video monitor above the VCR should be
showing a picture at this time.
If it is not:
- Double check the VCR/monitor connections
- Double check the connection between the
Radio Beacon transmitter and the VCR
- Check the 9 Volt battery for proper voltage
- Check the power connector at the pinhole
camera to ensure the Relay Board is working
- Use an oscilloscope to verify that a video
signal is coming from the pinhole camera
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Power-up the Radio Scanner on the
workbench. Set the scanner to the frequency
446.375 MHZ - this is on channel 2.
If the scanner is not on channel 2, press the
Manual button then the Up or Down arrow
to indicate direction of channel change.
Press the Manual button until you reach
channel 2.
Power-up the TNC.
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On Jupiter, start a terminal program to
view telemetry.
If in Windows, you may use
Hyperterminal. From the Start menu select
Programs, Accessories, Hyperterminal.
There is a HABET icon in the folder that
has all of the test station defaults set for
proper reception of data.
You may also exit to DOS and use the
terminal program TELIX (the same as
Flight and Recovery use).
If any of this equipment is malfunctioning,
you may use the standard Flight gear in the
Flight Console area for testing purposes.
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Allow the LSB-1 under test to run for a minimum of 15 minutes. After this
period of time, check the following:
- Proper telemetry format on Jupiter or console data computer
- Callsign is correct
- Analog/digital data appears to be correct
- Pinhole video reception is clear on video monitor
- Lock has been obtained by the GPS board – this is indicated on the
GPS telemetry as a change from 0 to 1 in data field #6
Power down the LSB-1
- Disconnect external 12V lead-acid battery and depress reset switches
- Disconnect all test cables
- Tag external power connector with green wire tie tag
- Place LSB-1 in cabinet
Power down test equipment and store cables
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MRR Checklist
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Final Flight Assembly & Test
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FRR Checklist
The Flight Readiness Review (FRR) is
the last check before flight. The
Engineering Team must have the
spacecraft that is assigned for the
mission ready to go. That means it is
ready to fly as if you were going to
launch at the end of the FRR.
Prior to the FRR, the Engineering
Team will need to power-up the
spacecraft on external power. This will
allow the Flight and Recovery Teams
the chance to test their equipment to
insure it is flight-ready.
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Engineering Launch Support
After the FRR, the spacecraft that is being flown becomes the responsibility
of the Launch Team. However, the Engineering Team will have at least one
individual assigned as a Launch support person.
The Launch Support Engineer will be responsible for helping the Launch
Team determine if the spacecraft is functioning within the parameters
determined before flight. They will also be responsible for making sure that
the Launch team remembers perform any necessary functions prior to launch.
These can include things such as reset buttons pushed, audio beacon turned
on, drain plug removed for ballast dump, etc. All of these things will be nontypical for any given flight, and the Launch Team may not be equipped
(trained) to perform the necessary functions.
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Post-Flight Spacecraft Check-In
Once the mission has been completed, a Post-Flight Spacecraft Check MUST
be performed.
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Engineering Technical Training
Lithium Battery String Assembly
Lead-Acid Battery Charging
Wire Harness and Connector Assembly
Spacecraft Enclosure Assembly
Soldering
Circuit Board Design and Layout
Circuit Board Etching
Cutdown Coil Assembly
Lab Equipment
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Lithium Battery String Assembly
HABET uses Lithium Sulphur Dioxide
(LiSO2) batteries for all flights. These
batteries are lightweight and very
powerful.
The battery packs for flights are
assembled in the lab from military
surplus batteries. These batteries come
in groups of ten and must be broken
apart and then reassembled into the
appropriate voltage packs needed by
HABET.
This segment of training will
completely describe this process.
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Each cell (approx. the same size as a flashlight D-cell)
in the surplus package is capable of providing 3V DC.
Thus any battery packs made will be a multiple of 3V
(i.e. - 3, 6, 9, etc.).
Each cell is also capable of providing 7000
milliamphours of power. What this means is that each
cell could provide 7000 milliamps of continuous
power for one hour before being drained, or 1000
milliamps of continuous power for 7 hours before
being drained.
As stated earlier, these batteries are very powerful.
Contacting the positive and negative terminals
together will cause sparking and possible explosion.
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THESE CELLS ARE NOT
RECHARGEABLE!!!!!!!
Attempts to recharge these
batteries will lead to
explosion and fire, along
with possible personal injury
BOOM!
- DO NOT MAKE THIS
MISTAKE!
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Caution should always be exercised when handling, assembling, and
connecting these batteries - they can be hazardous.
The picture shown below is evidence of what can happen.
This is what was
left after a 9V
battery pack
exploded.
It had been
mistakenly
hooked up to be
recharged!
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First, the existing surplus batteries must be
broken apart so that they may be reassembled
into something HABET can use.
Cut open the plastic bag and remove the
white battery box.
Then open the white outer box and remove
the battery pack - save the white box - it will
be used later in this process.
Carefully slice open the lithium battery box at
both ends. Remove the battery cells from the
box.
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Finished battery cell separation
Carefully pry the rows of cells
apart. Cut any wiring that is
hanging from the connections this will include the fuse
connector block and the other
wiring.
Cut the cells apart at the spots
shown - leave the other
connections between the cells.
This will make assembly into
battery packs easier later on.
Cut battery
tabs here
There should be four groups of
cells: 2 groups of two and 2
groups of three.
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Select the appropriate number of cells to
make the battery pack (this example will
use 4 cells - making it a 12V pack).
Align the cells to make their
interconnection easier. The positive
connection is in the middle of the cell
and the negative is along the outside
edge of the cell. Connections will be
made ‘+’ to ‘-’ to achieve 12V.
White cardboard
from outer box
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Cut a piece of cardboard from the white
box saved earlier - this will serve to
support the cells and keep them from
moving.
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Using the piece of cardboard as a support, tape the cells together with gray duct
tape. Be sure to use the gray tape! The battery pack will be color-coded at the
end of this procedure with the appropriate color.
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Cover the bottom of the battery pack with gray duct tape also. Using two pieces
of tape, make approximately a double width strip of tape that will cover the bottom
plus extra on the end. Place the battery pack in the middle of the tape and fold
over the sides. Cut the ends at the points shown to aid in the folding of the tape.
The taped battery pack should look as shown below.
Cut tape here
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The cells must now be connected to complete the battery pack. The cells that
already have their connection strips in place will not need to be altered. However,
where the cells have no connection to other cells, they will need to have wiring
soldered to them to complete the battery pack. A wiring harness will also be
soldered to what will become the positive and negative terminals of the battery
pack (see the technical section on soldering for more details on how to solder).
Note: the positive terminal of each cell is the middle terminal and the negative
terminal of each cell is on the edge of the cell.
Interconnection
required to complete
battery pack to 12V
Negative terminal
of battery pack
Positive terminal
of battery pack
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Place small pieces of duct tape to insulate the area to be interconnected and
soldered. THIS IS CRITICAL! Because these cells are powerful - shorts in
wiring can be dangerous and can happen fairly easily (not to mention the
fact that failure in flight would be extremely bad!!). Insulation is important
to keep this from happening.
Terminals to be
connected
Duct tape insulation
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Use the heavy-duty
soldering gun to make
the connections to the
cells - they absorb heat
very well and the small
soldering iron cannot
provide enough heat for
solder to stick to the
metal.
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Tin (apply solder) the
metal tabs that are to
be connected - make
sure the solder flows
well and leave an
adequate amount for
the wire connection to
be made later.
Tinned tabs
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Cut a short piece of 18
gauge wire (enough to
connect the two tabs).
Strip the ends and tin
them with solder.
Place the wire on the
tabs and heat with the
soldering gun to make
the connection.
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Visually inspect the
connections for tightness
- wiggle the wires to
make sure they will not
come loose in flight.
Cover the connections
with another layer of
duct tape for insulation.
Tin the positive and negative battery pack
terminals with solder.
Make a wiring harness for the battery pack (see the
technical section on Wire Harness and Connector
Assembly). Measure the ends so that the main
wiring harness will be in the center of the battery
pack as shown. The length of the harness that
extends from the battery will vary depending on
the application.
Tinned tabs
Wire harness
(centered)
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Strip the ends of the wiring
harness, ten tin the ends with
solder. Solder the wiring
harness to the battery pack.
Make sure to attach the red wire
to the positive terminal and the
black wire to the negative
terminal - THIS IS CRITICAL!!
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Once the wiring harness has been soldered
in place, double check the connections to
make sure they are secure (wiggle and tug
on them!).
The completed battery pack should look
like the one shown below.
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Cover the top of the battery pack with another layer of duct tape. A double
width strip should be used to help protect the terminals and hold the wiring in
place. Cut the tape to allow the wiring harness to extend through. When
finished the battery pack will look like the one shown below.
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The battery pack needs to have its final layer of duct tape (finally!). The color
of duct tape selected will be based on the voltage of the battery pack - this
allows users to visually tell what the voltage is without having to measure the
voltage. The color-code is as follows:
Blue - 9 Volts
Yellow - 15 Volts
Red - 12 Volts
Green - 24 Volts
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Once the colored tape has been applied,
write the current date near the bottom of
the battery pack with a permanent marker.
Check the voltage at the connector end of the battery pack to ensure that all
cells are correctly connected and functioning. Once this is done, place the
battery in the HABET Engineering cabinet in the appropriate container.
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Wire Harness & Connector Assembly
HABET uses many different types of wiring
harnesses for its spacecraft. There are a number
of standard types (power supply wiring, etc.).
There are also many custom made harnesses for
many different purposes - these are usually
mission specific and made for each flight.
When deciding what type of connector and wire
to use, there are a number of factors that will
impact what connectors you will use. Wire size
will be determined by the amount of current that
will be running in the circuit. Connector type
will be determined by the set of standard
connectors, and what they will be used for.
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Lead-Acid Battery Charging
HABET uses two different types of Lead-Acid
batteries during a typical mission.
The small battery shown at right is used for such
things as the external power for the spacecraft
during the fill process. It is also used for
powering the Radio Telemetry Unit that the
Recovery Team uses.
The Recovery Team also uses a large gel-cell
Lead Acid battery for powering the video monitor
and VCR that are used for pinhole video capture.
Proper recharging of these batteries is VERY
IMPORTANT!
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To charge the smaller Lead-Acid batteries, you
will need the following items:
- Elenco Model XP-650 Variable Power Supply
- HP 3490A Digital Multimeter
- Battery charging wire harness (this should be
already attached to the power supply and multimeter)
All of these items are on the HABET Test Bench in
room 2352.
Power Supply
Multimeter
Wire Harness
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Double check the connections to the
Power Supply and the Multimeter.
On the Power Supply:
- black wire to green (-) terminal
- red wire to red (+) terminal
On the Multimeter:
- orient the connector as shown
Double check that the Power Supply and
Multimeter are both turned off.
Connect the battery to the white two-pin
connector.
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Turn on the Multimeter.
The voltage shown will be the
actual voltage of the battery
(before charging starts).
Voltage Adjust
Current Adjust
On the Power Supply, adjust the
voltage knob (left-hand) fully
counter-clockwise. This will
adjust it to zero volts output
Adjust the current knob
(right-hand) fully clockwise.
THIS MUST BE DONE BEFORE THE POWER SUPPLY IS TURNED ON!!
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Current Meter
Turn on the Power Supply.
Carefully adjust the voltage
control knob clockwise until the
current meter starts to move.
The current meter is the one on
the right hand side labeled D.C.
AMPERE.
DO NOT EXCEED 1.0
Amps on the scale
reading!!! This could
cause the battery to
explode and cause
serious damage.
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Power Switch
At the same time, check the voltage on the Multimeter
DO NOT EXCEED 14.5 Volts as shown on the
Multimeter or explosion and damage may result.
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Periodically, you will have to check the current and voltage levels on the Power
Supply and the Multimeter. As the battery charges, the voltage will increase and
the current will decrease.
Keep increasing the voltage knob clockwise on the Power Supply until the voltage
reading on the Multimeter has reached 14.50 Volts. DO NOT Exceed 1.0 Amps!
Once this voltage has been reached, leave the battery connected until the current
meter has reached zero.
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Fill in the information on a Battery
Recharge Tag. This sheet is on the
HABET Engineering workbench area
in the middle near the technical
notebooks, etc.
Apply the Battery Recharge Tag over
the end of the battery connector. This
will allow anyone to see that the battery
has been charged.
Once this has been completed return the
battery to it’s proper location (i.e. - the
Launch Team Box, Recovery Team Box,
etc.).
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Spacecraft Enclosure Assembly
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Soldering
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Circuit Board Design & Layout
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Circuit Board Etching
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Cutdown Coil Assembly
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Lab Equipment
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Spacecraft Bus Types
LSB-1
LSB-2
HSB-1
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LSB-1
The LSB-1 (Light Spacecraft Bus) is
designed with simplicity in mind.
Typically it is not used for any major
scientific experiments. It can be used
for testing of new engineering circuit
designs, imaging flights and for
operations team proficiency flights.
It is designed for flights under six
pounds to meet FAA requirements.
It includes both custom-designed
circuitry (made in the lab) and
commercial-off-the-shelf (COTS)
circuit boards.
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The functional
block diagram
for the LSB-1 is
shown at right.
To familiarize
yourself with its
individual
components,
click on any of
the components
to view the
technical
description and
interconnection
properties of
each.
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LSB-1: GPS Receiver
HABET currently uses a
Motorola GPS receiver.
It is based on their Oncore
GPS engine series. There are
two different versions
available for use in spacecraft
- however, since they are
functionally the same, we will
ignore their differences here.
Each receiver has a minimum
of 8 channels (can receive
signals from up to 8 satellites
at a time).
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Motorola VP Oncore GPS Engine
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There are two connectors on the GPS
board that are used for interfacing with
the other components in the LSB-1.
Data/Power
Connector
The first is the Data/Power
Connector. It is a 10-pin connector
that has pins for +5V, Ground, and an
RS-232 interface for programming
and external communication.
The second is the Antenna
Connector. It is an MCX/RF
connector that hooks to the external
GPS antenna. This allows the GPS
board to receive radio signals from
GPS satellites.
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Antenna
Connector
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The Data/Power Connector is a standard 10-pin, 2
row, .100 Header. The individual pins are
connected as follows (not all of these pins are
used on the LSB-1):
Pin 1: BATT
External battery Back-up
Pin 2: PWR
+5V DC, Regulated power
Pin 3: GND
Ground
Pin 4: VPP
EPROM Programming Voltage
Pin #
2 4 6 8 10
Pin #
1
3
5
Pin 5: TTL RXD2 RTCM Input Port - DGPS
Pin 6: 1PPS
1 Second Timing Pulse
Pin 7: 1PPS RTN
Timing Pulse Return (Ground)
Pin 8: TTL TXD1 Primary Output
Pin 9: TTL RXD1 Primary Input
Pin 10: TTL RXD2 TTL Return (Ground)
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7
9
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Pin 1 (BATT) is the External Battery Back-up pin. It is
used to connect a small battery to the GPS board to make it
retain it’s memory and last known position. It is not
connected on the LSB-1.
Pin 2 (PWR) is where the 5V DC regulated power is connected. This voltage MUST
be within +/- 25% - that is in the range of 4.75V to 5.25V or the GPS board will not
function correctly. It may drift in and out of GPS lock, or it may never lock at all.
The 5V/RS232 Interface Board provides this voltage through one of it’s regulators.
Pin 3 (GND) is the ground connection. This must be connected to battery ground for
the board to operate correctly. The 5V/RS232 board is connected to battery ground.
Pin 4 (VPP) is used only for programming the EPROM of the GPS board. This would
be used in the case of a new firmware update from Motorola.
Pin 5 (TTL RXD2) is a TTL Logic level input (0 to 5V). It is used for input directly
from a Differential GPS receiver (DGPS). The GPS receiver uses this input for
corrections that allow the position to be more accurate. The LSB-1 does not use this.
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Pin 6 (1PPS) is a timing connection. This pin outputs a 0 to
5V pulse that is 200 mS in width. It has an accuracy of <500
nS with a rise time of 20 to 30 nS. It can be used for accurate
timing of events onboard. It is not used on the LSB-1.
Pin 7 (1PPS RTN) is the ground connection for the 1PPS connection. This pin ensures
that the pulse is translated by other circuits as a TTL logic signal.
Pin 8 (TTL TXD1) is the primary TTL output of the GPS board. It is the data
connection that connects to the MIM Module so that the GPS string appears in the
telemetry. There is also a spare connector from this pin to connect to other components
that require GPS – such as the Altitude Switch.
Pin 9 (TTL RXD1) is the primary TTL input of the GPS board. It is used strictly for
sending communications to the board for setting the parameters. This includes the
baud rate of TTL TXD1, the type of GPS string transmitted, etc. It is only used for
programming the GPS board prior to installation in an LSB-1 mainboard.
Pin 10 (TTL RTN) is the ground connection for the TTL Ports. This pin ensures that
the TTL input pins and output pins are correctly interpreted by other circuits.
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The wiring harness that connects the GPS
board to the 5V/RS232 board is shown
here. The 10-pin Header Connector is
connected to the GPS board’s Data/Power
Connector.
RS232 Data
Connector
5V Power
Connector
The RS232 Data Connector is connected
to the 5V/RS232 Board at the terminal
marked ‘GPS’.
Auxiliary
GPS Conn.
Grey Data
Wire Harness
Orange & Black
Power Wire Harness
10-pin Header
Connector
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The 5V Power Connector is also
connected to the 5V/RS232 Board. It is
connected to any of the 5V power ports
available (there are 8 – see the section on
the 5v/RS 232 Board).
There is also an Auxiliary GPS Connector
for connection to other circuits that use
GPS as an input (Altitude Switch).
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The schematic for the wiring harness for connecting the GPS board to the
5V/RS232 Interface board is shown below.
Grey Data
Wire Harness
Orange & Black
Power Wire Harness
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GPS Receiver Programming
All Motorola GPS receivers
come programmed with
factory settings. The
Engineering Team is
responsible for programming
the receivers for flight.
The software package used for this is called ‘SynTac’. This software allows the
user to set many parameters of the GPS receiver. Some of these include setting
the serial baud rate, NMEA output, receiver use type (i.e. land, air, or water), and
interval between position outputs.
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The user window
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LSB-1: GPS Antenna
The GPS antenna that is used with the
GPS receiver is also a product made by
Motorola.
It is an active patch antenna - this means
that it is a circuit board type antenna with
an integrated circuit amplifier built in to
help boost signal reception.
The antenna connects to the GPS receiver
via a small coaxial cable with an MCXtype connector.
The amplifier receives its power from the
GPS receiver up through the coax cable.
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LSB-1: External Power Relay Board
This circuit board was custom
designed in the SSOL.
Its purpose is to allow
spacecraft to be powered-up
externally with a 12V battery.
It consists of two relays. The
first is the main power relay
that provides power from the
battery to all of the components
in the spacecraft. The other
relay is for the Emergency
Radio Beacon power.
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LSB-1: 70cm Transceiver
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LSB-1: Transmitter Antenna
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LSB-1: Audio Beacon
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LSB-1: MIM Module
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LSB-1: RS232 Interface/5V Regulator
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LSB-1: ATV Transmitter
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LSB-1: Pinhole Camera
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LSB-1: Sensors
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LSB-1: Lithium Battery Packs
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LSB-1: Wiring Harness/Color Code
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Engineering Team Sign Off
• Once you have completed this Power Point presentation for the
Engineering Team Training you can take the exam.
• Remember that you need a 90% score, but you can repeat the
exam as many times as necessary (two hours between exams)
• Press the “print exam” button below and once completed, take the
exam to the Engineering Director (or HABET Manager) for the oral
exam and sign-off on your certification card.
Print Exam
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