Presentazione della Societ

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STRATOBUS A NEW APPROACH IN DESIGNING
MULTI-USER STATOSPHERIC PLATFORMS

• Saitec srl
• IFAC - CNR Firenze
• DMTI - Facoltà di Ingegneria
• Università degli Studi di Firenze

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STRATOBUS CONSORTIUM
STEERING BOARD Ing. M.Corti (Saitec Srl), Ing.
A.Boscaleri (IFAC-CNR Firenze), Ing. P.Rissone
(DMTI-Università degli Studi di Firenze)
PROGRAM MANAGER Ing. M.Corti (Saitec Srl)
SYSTEM MANAGER Ing. A.Boscaleri (IFAC-CNR Firenze)
MECHANICAL STRUCTURE Ing. P.Rissone
(DMTI-Università di Firenze)
ACS (ATTITUDE CONTROL SYSTEM) Ing. A.Boscaleri
(IFAC-CNR Firenze)
POWER SUPPLY Ing. A.Boscaleri (IFAC-CNR Firenze)
(OBC) ON BOARD COMPUTER HW Ing. L.Favilli (Saitec
Srl)
(OBC) ON BOARD COMPUTER SW Ing. E.Barbagallo
(Saitec Srl)
GSE AND SERVER WEB Ing. F.Corti (Saitec Srl)
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STRATOBUS APPROACH
Scientific Community
Industry
Think the experiment, forget the flight
Business Opportunity in Flight Organization

• Multi-user Platform with high number of
  experiments that may be performed
• during the same flight
• Regular flight service with planning and payload
  ticketing
• Experiment ticket cost related to the weight,
  volume and use of resources
• Server WEB service for flight booking and
  experiment timeline planning
• Multi-user GSE with user data network link for
  experiment control, data quick
• look and storage

1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
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STRATOBUS GUIDELINES

• High ratio between the payload and the lift
  capacity of
• the balloon
• Reusability of the resources from previous
  missions in
• order to reduce the overall cost
• A lot of possibly specifications among the
  functional
• requirements of the different experiments
• Timeline definition for each experiment for
  platform
• resources time sharing
• Standard HW/SW I/F between payload and OCB (On
• Board Computer)
• Uplink/Downlink for TM/TC messages
• A versatile mechanical structure capable of
  easily
• balancing itself when housing different
  payloads

• Variable bit-rate upon request
• The use of renewable power sources arranged
• so as to survive landing
• Solar Panels and fuel cells will be employed
• depending whether the measure measurements
• takes place during day or at night
• Attitude solution (gyros, magnetometer,) sent
• to all payloads as housekeeping data
• Azimuthal movement of the whole platform by
• means of a Pivot and the possibility of
  controlling
• also the elevation motion if requested.
• Azimuthal movement time sharing in the case of
• simultaneous and different scanning of sky
• patches

1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
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MULTIUSER STATOSPHERIC PLATFORM ARCHITECTURE
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GROUND SUPPORT ARCHITECTURE
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STRATOBUS MAIN COMPONENTS

• 1. ACS (Attitude Control System)
• 1.1 OBC (On Board Computer)
• 1.2 PIVOT (AZ CONTROL UNIT)
• 1.3 ECU (EL CONTROL UNIT)
• 1.4 SENSOR
• 1.4.1 Magnetometer
• 1.4.2 Sun sensor (4-quadrant diode or
  CMOS sensor)
• 1.4.3 Star sensor
• 1.4.4 Inertial sensors (to describe
  pendolum motion)
• 2. GONDOLA MODULAR FRAME
• 3. MULTIUSER UP- DOWN LINK
• 4. SOLAR PANELS (WITH LANDING SAFETY RECOVERY)
• 5. FUEL CELLS FOR NIGHT TIME FLIGHT

1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
8
STRATOBUS MAIN COMPONENTS
OBC (ON BOARD COMPUTER)
LEON3 Core
TC/TM Interface
Timers I/F
GPIO
Debug I/F
AMBA Bus
Memory Controller
Payload 1 STD I/F
Payload 2 STD I/F
Payload N STD I/F

• SYSTEM-ON-a-CHIP (SOC) DESIGN
• LEON3 PROCESSOR
• AMBA-2.0 AHB BUS
• SPARC V8 ARCHITECTURE (IEEE-1754)

1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
9
STRATOBUS MAIN COMPONENTS

• PIVOT (AZ CONTROL UNIT)
• DESIGNED ACCORDING TO NSBF-NASA SAFETY FACTOR 10G
  VERTICAL AND 5G 45 (UP TO 2500KG)
• TRAPANI BASE safety criteria (STRAIN GAGE)
• SLEEP RING
• 2XTORQUE MOTOR WITH HIGH TORQUE
  SENSITIVITY(1.4Nw.m/A)
• GEAR BOX MODULE WHEN DRIVING PAYLOADS WITH LARGE
  INERTIA MOMENT (100x )
• FEATURES DIFFERENT POINTING STRATEGIES
• CAN BE MECHANICALLY OVERTURNED

1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
10
STRATOBUS MAIN COMPONENTS
PIVOT EXPLODED VIEW
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
11
STRATOBUS MAIN COMPONENTS
PIVOT ASSEMBLY VIEW
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
12
STRATOBUS MAIN COMPONENTS
PIVOT OVERTURNED FEATURE
AN EXAMPLE OF HOW TO EMPLOY THE OVERTURNED
FEATURE OF THE PIVOT TO SPIN A SMALL
PLATFORM DURING PRE-LAUNCH TESTS OR
CALIBRATION THE PIVOT IS CONTROLLED BY THE SAME
H/S AND CABLES USED DURING THE FLIGHT
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
13
STRATOBUS MAIN COMPONENTS
FLUX GATE MAGNETOMETER

• IT IS A FAST, LOW COST AND SHOW A LOW ACCURACY
  SENSOR
• IT IS EMPLOYED AT FLOAT AS FIRST AZIMUTH SENSOR
  CAPABLE OF TO ADDRESS THE PLATFORM TOWARDS A
  GIVEN AZIMUTH SECTOR
• IT IS MADE BY TWO QUADRATURE COILS
• IT OUTPUTS SIGNALS PROPORTIONAL TO SINE (EAST
  COMPONENT ) AND COSINE (NORTH COMPONENT) FUNCTION
  WHEN THE COILS ARE SPUN AROUND A HORIZONTAL PLANE
  FROM NORTH TO EAST DIRECTION
• IT IS ALREADY TESTED AT MID LATITUDE BALLOON
  FLIGHTS
• IT OPERATES FROM 40 50 WITHIN A BANDWIDTH OF
  10HZ
• IT SHOWS AN ACCURACY THAT DEPENDS ON THE LATITUDE
  OF THE BALLOON TRAJECTORY
• /- 10 ARC-SECONDS (EQUATORIAL BELT)
• /-17 ARC-SECONDS (MID LATITUDE)
• /- 6 ARC-MINUTES (1000NT)
• IT SHOULD BE CONTINUOUSLY CORRECTED BY THE ACTUAL
  DECLINATION ERROR

1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
14
STRATOBUS MAIN COMPONENTS
FLUX GATE MAGNETOMETER
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
15
STRATOBUS MAIN COMPONENTS
GONDOLA MODULAR FRAME
OPTIMIZATION
BALANCING
MODULAR STRUCTURE WHERE EACH BEAM ONLY UNDERGOES
TENSILE OR COMPRESSION STRESS IN SUCH A WAY WE
CAN MINIMIZE THE WEIGHT OF THE GONDOLA
A DIFFERENT LENGTH OF BEAMS MAKE THE CENTER OF
MASS AND THE ROTATION AXIS OVERLAPPING WITHOUT
ADDING EXTRA WEIGHT
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
16
SURVIVING AT LANDINDTHE SOLAR ARRAY IS
ARRANGED LIKE A VENETIAN BLINDA POSSIBLE
SOLUTION TO AVOID DEMAGES AT LANDING IS A SAFETY
BOX TO STOW SOLAR PANELS
STRATOBUS MAIN COMPONENTS
SOLAR PANELS (WITH LANDING SAFETY RECOVERY)
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
17
STRATOBUS MAIN COMPONENTS
FUEL CELLS THERMAL TRANSFER SIMULATION
THE SIMULATION SHOWS HOW IS POSSIBLE TO EMPLOY
PEM FUEL CELL IN STRATOSPHERIC FLIGHTS FOR 1 KW
OF ELECTRIC POWER GENERATED AT LEAST 1 KW OF
THERMAL FLUX HAS TO BE DISSIPATED
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
18
STRATOBUS WWWTHE WEB

• A STRATOSPHERIC RIDE BY A CLICK ONLY
• INTERFACES THE STRATOBUS CONSORTIUM STATEMENTS
  AND POTENZIAL USERS
• SHOWS IN REAL TIME THE RESIDUAL ROOM AVALAIBLE ON
  A GIVEN FLIGHT IN A GIVEN CAMPAIGN
• VERIFIES THE COMPATIBILITY OF THE POSSIBLE
  USERS EXPERIMENT WITH THOSE ALREADY ACCEPTED
• ANSWERS IN A FEW DAYS ABOUT THE AVALAIBILITY AND
  COST OF THE STRATOSPHERIC RIDE
• WAITS FOR A FINAL OK FROM THE USER AND INDICATES
  THE WAY OF THE PAYMENT

1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY
19
STRATOBUS WORK BREAKDOWN STRUCTURE
STRATOBUS PROJECT
SYSTEM ELEMENTS 1A
SUBSYSTEM ELEMENTS 1B
S/S GSE 1B5
S/S MECHANICAL STRUCTURE 1B1
PROJECT OFFICE 1A-A
S/S SERVER WEB 1B6
S/S POWER SUPPLY 1B3
S/S ACS 1B2
S/S MULTIUSER PLATFORM 1B4
SYSTEM AIT 1A-B
SYSTEM MANAGEMENT 1A-AA
S/S GONDOLA 1B11
S/S PIVOT 1B12
S/S LANDING SAFETY 1B13
SYSTEM ENGINEERING 1A-AD
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STRATOBUS Partners for the future
Innovation, technology and technical problems
together...
for a partnership...
LEN Srl Chiavari (GE) Dip. Chimica Industriale
e Materiali, Università di Bologna INAF-IASF di
Bologna (OPEN)
...to find the solution
... successfully
1st WORKSHOP on SCIENCE AND TECHNOLOGY through
LONG DURATION BALLOONS June 3rd
and 4th, 2008 - ROME, ITALY