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PUJLLAYBUENOS AIRES
12 - 11 - 2019
2nd IAA Latin American Symposium on Small Satellites
1
THE FIRST NANOSATELLITE ENGINEERING MODEL DEVELOPED IN UNSAM
Introduction
The Team
Burroni, Tomás IgnacioConde, Nicolás ValentínEscobar, Matías IgnacioLópez, Luis SantiagoMucanna, CamilaPenida, Matías
Tutor:
Rosito, Claus
Burroni
López Mucanna
Conde
Penida
Escobar
Astronautical Engineering Students
(ECyT,UNSAM)
209/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Challenge
2nd Cube Design
Instituto Nacional de Pesquisas Espaciais
INPE
July 24th to 27th, 2019
-Engineering students
-3 Categories: cubesat, cansat, mockup.
São José Dos Campos, São Paulo, Brasil
INGENIERIAESPACIAL
Cube Design 2019 - UNSAM
Competition
Competition TestsEnvironmental Tests
Dimension
100mm x 100mmRev 13
Thermal Cycle-10°C to 50°C
2 cycles1,5°C p/min
Vibration14.1 Grms
2 min e/axisFalcon 9
Basic Level TestsCommunicationTelecommands
10 m
Intermediate Level Tests
MechanismAntenna DeployTelecommand100mm (Min)
Attitude Det.
Azimuth onlyLight Source
Battery ChargeLight source (Sun)
Send dataEvery 1 min
Advance Level Tests
Att. Stable
Initial Speed60 rpm
Att. Ctrl 2Set 2 different
azimuthsTelecommand
Att. Ctrl 1Set Azimuth towards light
source
Mission
Satellite Image
Take picture of an imageRecognize deforested areaIdentify fire focuses
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Proposal
Tests we aim for
1. Environmental Tests1.1. Dimension1.2. Thermal Cycle1.3. Vibration
2. Basic Level Tests2.1. Communication
3. Intermediate Level Tests3.1. Mechanisms3.2. Battery Charge3.3. Attitude Determination
4. Advance Level Tests4.1. Attitude Stabilization4.2. Attitude Control 14.3. Attitude Control 2
5. Mission Tests5.1. Satellite Image
Prioridad Prueba
Primaria
1.1
1.2
1.3
Secundaria
2.1
3.1
3.2
3.3
Terciaria
4.1
4.2.
4.3
5.1
509/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Project Management
WBS
1. Project Management1.1. Documentation Management1.2. Schedule Management1.3. Resource Management1.4. Challenge Management1.5. Communication and Coordination
Management1.6. WBS
1.6.1. WBS Block Diagram1.6.2. WBS Description Document
609/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Documentation plan
Project Proposal
Block Diagram
WBS / Diagram / Schedule
Requirements Specification
Mass and Power Budget
Structure Analysis and Design
Command and Data Handling Analysis and Design
Power Analysis and Design
Thermal Control Analysis and Design
Communication Analysis and Design
Attitude Determination and Control Analysis and Design
V&V Plan
Interface Document
Inventory
Purchases Register
Operation in competition Checklist
PDR Presentation
Final Presentation
Documents Register
709/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Resources
Facilitated by the Colomb Institute (CONAE-UNSAM), ECyT UNSAM, CNEA, Testa Brava and Ernesto Mayer S.A.
Working Facilities
Materials
809/05/2019
Collaborators
Technical Advice:
Hernan Socolovsky Silvio Scechet Pablo MeilánLeonel Garategaray Nahuel Castello Roberto AlonsoRoberto Yasielsky Carlos Canal Edgardo RoggeroAníbal Feder Pablo Servidia
Tutor: Claus Rosito
Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
System WBS
WBS: Satellite and Ground Station
909/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
System Engineering
Block Diagram
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Satellite
❏ Subsystems❏ Structure❏ Command and Data Handling❏ Power❏ Attitude Determination and Control❏ Communication❏ Thermal Control
1209/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Configuration
External Configuration
Payload on face +X; Antenna on face +Z; Panels on XY- It can be achieved if the payload fits within an area of 10mm high and less than 60mm
wide.
- Antenna internal. The deployment of the antenna becomes more complex.
- The +Z and -Z sides are free.
- More efficient in the occupied surface.13
09/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Structure
Primary Structure Initial Weight: 242 g ; Material: Al 6061
1509/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Structure
Secondary Structure
DIN 975 (M3) - Stainless SteelIt consists of 4 threaded steel rods that cross in the Z direction to the primary structure. These will be anchored with two nuts, one side and the other side of the Z face.
And the PCBs separated by Stand Off of 8, 10 and 15mm.
1609/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Structure
Analysis: Body Load on X
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Max Stress Allowed MoS
12.275 MPa 175 MPa 850%
Max Stress Allowed MoS
27.06 MPa 270 MPa 565%
Max Stress Allowed MoS
20.18 MPa 270 MPa 791%
Max Stress Allowed MoS
-94.68 MPa 215 MPa 51.39%
Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Boundary Conditions
Satellite | Structure
Analysis: EigenValues & Frequency Response
1809/05/2019Cube Design 2019 - 1st Review
F [Hz] Modal Mass
391 0.032
886 0.293
1010 0.314
1134 0.777
2000 0.785
Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Command and Data Handling
ESP32Specifications
Pin Diagram
2309/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Command and Data Handling
Software
Three software packages: onBoardESP32, groundESP32 and groundPC.
-> User graphic interface.
-> Decrypt data and RF communication.
-> Different operation modes.
■ Stand-by Mode.■ Full Mode.
groundPC
groundESP32
onBoardESP32
2409/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
System Engineering
Power Budget
Description Consumption by hour [Ah] Quantity Total [Ah] Hours [h]
Power Supply 0,0093 1,0000 0,0093
SOC sensors 0,0010 2,0000 0,0093 4,6667Control Térmico 0,3159 1,0000 0,3159Temperature sensors 0,0001 7,0000 0,0033 4,6667Heater 0,5000 1,0000 0,3127 0,6253Control and data handling 0,2333 1,0000 0,2333ESP32 0,0500 1,0000 0,2333 4,6667Communication 0,0355 1,0000 0,0355ESP32 Receiver (ON) 0,2500 1,0000 0,0194 0,0777ESP32 Receiver (OFF) 0,0035 1,0000 0,0161 4,5889Deployment System 0,0000 1,0000 0,0000 0,9333Attitude Determination 0,0000 1,0000 0,0000Light Sensor 0,0000 4,0000 0,0000 4,6667TOTAL 0,5941
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Satellite | Power
Design
2709/05/2019Cube Design 2019 - 1st Review Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Power
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Satellite | Power
V&V 1. Battery characterization2. Solar Cells acceptance3. Solder verification4. Voltage measurement
characterization5. Circuit verification
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Satellite | Thermal Control
31Cube Design 2019 - 1st Review 09/05/2019
AFT Requirements HARDWARE
Allowable Flight Temperature
Temperature Requirements [°C ]
Operational Non Operational
min [°C] máx [°C] min [°C] máx [°C]
Control and Data Handling Subsystem
ESP32 -40 125 -40 150
Power Subsystem
Solar Panels -90 90 -90 90
Battery 0 60 -10 150
BMS (Battery Management System) -55 125 -55 150
Communication Subsystem
RF Tx-Rx -40 125 -40 150
Antena -100 200 -100 200
Sistema de Despliegue -40 100 -40 100
Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Active Thermal ControlHeater
INGENIERIAESPACIAL
Prototype made in Microlab CAD Design
Schematic
Final Product
Cube Design 2019 - UNSAM
Satellite | Thermal Control
INGENIERIAESPACIAL
Passive Thermal Control Thermal mass
Cube Design 2019 - UNSAM
Satellite | Thermal Control
Tests
INGENIERIAESPACIAL
NOTA: Se aplicó en la gráfica un algoritmo de suavizamiento natural por spline
Cube Design 2019 - UNSAM
Satellite | Thermal Control
Satellite | Attitude Determination and Control
Schematic
36Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Attitude Determination and Control
Algorithm
3709/05/201924/07/2019
az
Unknown values: el and az
Satellite | Attitude Determination and Control
Design
38Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Attitude Determination and Control
1. Solar sensors acceptance
2. Solder verification
3. Current measurement characterisation
4. Attitude determination
V&V
39Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Communication
Antenna
Frequency
Two 172,29 mm long strips for UHF frequency range
Dimensions
Length: 172,29 mmWidth: 12 mmThickness: 0,3 mm
Material
[Flexibility and shape memory]
Position
+Z facePointing in opposite +Y and -Y directionsLineal emission patterns
41Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Communication
Antenna Deployment Mechanism
Position 1: Antenna foldedAntenna strips go around the cubesat form +Z to -Z on opposite sides and are tied up with a nylon string that goes through the nichrome spring.
Transition: DeploymentA command is sent from the ground station and received by the cubesat. This allows the burning of the -Z face resistor and therefore the burning of the nylon string for release of the antenna.
Position 2: Antenna deployedThe antenna strips are standing straight on top of +Z face and pointing towards opposite Y directions.
-Z face
Burning resistor
20 mm nichrome springed wire
Stages
Mechanism
Activates by commandAllows to be folded again
42Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Communication
Antenna Deployment and Configuration Analysis
Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Communication
Circuits
44
Main Deployment
Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019
Satellite | Communication
V&V1. Antenna deployment
2. Antenna folding
3. ESP32 reception through ESP32 antenna
4. ESP32 transmission through ESP32 antenna
5. ESP32 reception through external antenna
6. ESP32 transmission through external antenna
7. Antenna radiation pattern characterization (Anechoic chamber)
45Cube Design 2019 - 1st Review 09/05/201945Cube Design 2019 - INPE 24/07/2019
Test - Thermal Cycle
INGENIERIAESPACIAL
Cube Design 2019 - UNSAM
Thermal Cycle-10°C to 50°C
2 cycles1,5°C p/min
Tests - Attitude determinationAttitude Det.
Azimuth onlyLight Source
Test - Shaker
INGENIERIAESPACIAL
Cube Design 2019 - UNSAM
Vibration14.1 Grms
2 min e/axisFalcon 9
Tests - Battery charge
Battery ChargeLight source (Sun)
Send dataEvery 1 min
Future plans
1. Circuit design improvements2. Structure optimization3. Payload development and integration4. Team expansion
a. More studentsb. Different majorsc. Different Universities?
5. Radiation testing (goes beyond CubeDesign)
Cube Design 2019 - 1st Review 09/05/2019Cube Design 2019 - INPE 24/07/2019