The presentation summarizes the design of the NatSat CubeSat mission. Key points include:
- NatSat will launch on an Indian PSLV rocket to a 600 km sun-synchronous orbit.
- Subsystems include electrical power, attitude control, command and data handling, and telecommunications.
- A passive thermal design uses paint and coatings to maintain component temperatures.
- Attitude is determined by a star tracker and controlled by reaction wheels with magnetic torque rods.
- Data is stored, collected from payloads, and transmitted to the ground via S-band radio.
- Risks and challenges are assessed prior to the mission.
A presentation held at SAPO CodeBits 2010 (http://codebits.eu/intra/s/session/114), describing the operational theory and basics as well as the building blocks of a remote-controlled model quadrocopter.
A video of this talk can be found here: http://videos.sapo.pt/HZSIm9FUl3D3bfqmVcsv
Real-Time Hardware-in-the-Loop Testing of an Excitation Control System for Os...Luigi Vanfretti
Poster Presentation at the IEEE PES General Meeting.
A feature of an Excitation Control System (ECS) for synchronous generators is to enable power system stabilization by providing an additional input to the Automatic Voltage Regulator (AVR) for external stabilization signals. This paper explores this feature by externally generating stabilization signals which are fed as an analog input to a commercial ECS. This allows bypassing the built-in PSS function in the ECS and gives more freedom to the end-user to utilize custom stabilizer models. ABB’s Unitrol 1020 Excitation Control System is coupled with Opal-RT’s eMEGAsim Real-Time simulator to perform Hardware-in-the-Loop simulation of the ECS. The output of several stabilizer models is fed to the ABB’s Unitrol 1020 ECS as external power system stabilization signals to analyze their performance for small signal stability enhancement.
Hardware & and software system for comparative analysis of GPS modules and ch...UNITESS
Hardware & and software system for comparative analysis of GPS modules and chip antennas from different manufacturers.
www.unitess.ru
sales@unitess.ru
BELARUS +375 (17) 365-35-28
RUSSIA +7 (495) 975-72-83
VIBER | WHATSAPP | TELEGRAM | WECHAT +375 (44) 715-34-69
A presentation held at SAPO CodeBits 2010 (http://codebits.eu/intra/s/session/114), describing the operational theory and basics as well as the building blocks of a remote-controlled model quadrocopter.
A video of this talk can be found here: http://videos.sapo.pt/HZSIm9FUl3D3bfqmVcsv
Real-Time Hardware-in-the-Loop Testing of an Excitation Control System for Os...Luigi Vanfretti
Poster Presentation at the IEEE PES General Meeting.
A feature of an Excitation Control System (ECS) for synchronous generators is to enable power system stabilization by providing an additional input to the Automatic Voltage Regulator (AVR) for external stabilization signals. This paper explores this feature by externally generating stabilization signals which are fed as an analog input to a commercial ECS. This allows bypassing the built-in PSS function in the ECS and gives more freedom to the end-user to utilize custom stabilizer models. ABB’s Unitrol 1020 Excitation Control System is coupled with Opal-RT’s eMEGAsim Real-Time simulator to perform Hardware-in-the-Loop simulation of the ECS. The output of several stabilizer models is fed to the ABB’s Unitrol 1020 ECS as external power system stabilization signals to analyze their performance for small signal stability enhancement.
Hardware & and software system for comparative analysis of GPS modules and ch...UNITESS
Hardware & and software system for comparative analysis of GPS modules and chip antennas from different manufacturers.
www.unitess.ru
sales@unitess.ru
BELARUS +375 (17) 365-35-28
RUSSIA +7 (495) 975-72-83
VIBER | WHATSAPP | TELEGRAM | WECHAT +375 (44) 715-34-69
E.ON Energy Research Center builds first interface between OPAL-RT and RTDS Technologies real-time simulators, opens new collaborative research opportunities
The NanoX acquisition system is an efficient data concentrator and recorder, with an ultra-compact design, and an ease of changing acquisition modules. The NanoX provide modularity and permit to plug/stack until sixteen data acquisition modules by unit. A unit is constituted by a CPU/Controller module with a optional recording capacity (from 32GB to 2TB) and a smart power supply module. The NanoX is a data acquisition concentrator completed with high speed (1Gbps) recording and transmitting system combined in the same device, with this device you can make all in one modular and compact solution where other solutions require two or three separate units.
PMU-Based Real-Time Damping Control System Software and Hardware Architecture...Luigi Vanfretti
Poster Presentation at the IEEE PES General Meeting. Low-frequency, electromechanically induced, inter- area oscillations are of concern in the continued stability of inter- connected power systems. Wide Area Monitoring, Protection and Control (WAMPAC) systems based on wide-area measurements such as synchrophasor (C37.118) data can be exploited to address the inter-area oscillation problem. This work develops a hardware prototype of a synchrophasor-based oscillation damping control system. A Compact Reconfigurable Input Output (cRIO) con- troller from National Instruments is used to implement the real- time prototype. This paper presents the design process followed for the development of the software architecture. The design method followed a three step process of design proposal, design refinement and finally attempted implementation. The goals of the design, the challenges faced and the refinements necessary are presented. The design implemented is tested and validated on OPAL-RT’s eMEGASIM real-time simulation platform and a brief discussion of the experimental results is included.
Power Performance Optimization using LiDAR technology : India Pilot Project R...Karim Fahssis 卡卡
Presentation given by MeteoPole's CEO Mr. Karim Fahssis at the IPP summit in November 2014 Delhi showing the results of the India Power Performance Optimization Pilot Project with Continuum Wind Energy on Surajbari wind farm project in Gujarat (Vestas turbines) with a proven +2.4% AEP increase after yaw error correction.
Quadcopter navigation using aakash tablet with on board image processingD Yogendra Rao
Final Presentation for Team Garuda . This quadcopter and its ground control station(GCS) was built in the Integrated Development Lab during my summer internship at IIT Bombay .
https://www.youtube.com/watch?v=0966YNqcisg.
Synchronization Protection and Redundancy in Next-Generation NetworksADVA
Nir Laufer of Oscilloquartz explained how to achieve optimum synchronization protection and redundancy in next-generation networks at the Workshop on Synchronization in Timing Systems 2016.
E.ON Energy Research Center builds first interface between OPAL-RT and RTDS Technologies real-time simulators, opens new collaborative research opportunities
The NanoX acquisition system is an efficient data concentrator and recorder, with an ultra-compact design, and an ease of changing acquisition modules. The NanoX provide modularity and permit to plug/stack until sixteen data acquisition modules by unit. A unit is constituted by a CPU/Controller module with a optional recording capacity (from 32GB to 2TB) and a smart power supply module. The NanoX is a data acquisition concentrator completed with high speed (1Gbps) recording and transmitting system combined in the same device, with this device you can make all in one modular and compact solution where other solutions require two or three separate units.
PMU-Based Real-Time Damping Control System Software and Hardware Architecture...Luigi Vanfretti
Poster Presentation at the IEEE PES General Meeting. Low-frequency, electromechanically induced, inter- area oscillations are of concern in the continued stability of inter- connected power systems. Wide Area Monitoring, Protection and Control (WAMPAC) systems based on wide-area measurements such as synchrophasor (C37.118) data can be exploited to address the inter-area oscillation problem. This work develops a hardware prototype of a synchrophasor-based oscillation damping control system. A Compact Reconfigurable Input Output (cRIO) con- troller from National Instruments is used to implement the real- time prototype. This paper presents the design process followed for the development of the software architecture. The design method followed a three step process of design proposal, design refinement and finally attempted implementation. The goals of the design, the challenges faced and the refinements necessary are presented. The design implemented is tested and validated on OPAL-RT’s eMEGASIM real-time simulation platform and a brief discussion of the experimental results is included.
Power Performance Optimization using LiDAR technology : India Pilot Project R...Karim Fahssis 卡卡
Presentation given by MeteoPole's CEO Mr. Karim Fahssis at the IPP summit in November 2014 Delhi showing the results of the India Power Performance Optimization Pilot Project with Continuum Wind Energy on Surajbari wind farm project in Gujarat (Vestas turbines) with a proven +2.4% AEP increase after yaw error correction.
Quadcopter navigation using aakash tablet with on board image processingD Yogendra Rao
Final Presentation for Team Garuda . This quadcopter and its ground control station(GCS) was built in the Integrated Development Lab during my summer internship at IIT Bombay .
https://www.youtube.com/watch?v=0966YNqcisg.
Synchronization Protection and Redundancy in Next-Generation NetworksADVA
Nir Laufer of Oscilloquartz explained how to achieve optimum synchronization protection and redundancy in next-generation networks at the Workshop on Synchronization in Timing Systems 2016.
Overview of Integrated Detector Electronics products including Application Specific Integrated Circuits, ROICs and low noise amplifiers for radiation detection.
IMU (inertial measurement unit) has already played significant roles in the control system of aerospace and other vehicle platforms. Due to the maturity and low cost of MEMS technology, IMU starts to penetrate consumer products such as smartphone, wearables and VR/AR devices.
This sharing will focus on the general introduction of IMU components, signal characteristics and application concepts, with an attempt to guide those who is interested in the IMU-based system integration and algorithm development.
Development of a High Performance Optical Cesium Beam Clock for Ground Applic...ADVA
At the VIII International “Metrology of Time and Space” Symposium in St. Petersburg, Patrick Berthoud revealed the latest results in the development of Oscilloquartz’s high-performance optical cesium beam clock.
Preliminary Test Results: High Performance Optically Pumped Cesium Beam ClockADVA
Patrick Berthoud’s presentation, delivered at WSTS 2016 in San Jose, reveals design specifications and the results of initial testing of Oscilloquartz's new high-performance optically pumped cesium beam clock.
El Barcelona Supercomputing Center (BSC) fue establecido en 2005 y alberga el MareNostrum, uno de los superordenadores más potentes de España. Somos el centro pionero de la supercomputación en España. Nuestra especialidad es la computación de altas prestaciones - también conocida como HPC o High Performance Computing- y nuestra misión es doble: ofrecer infraestructuras y servicio de supercomputación a los científicos españoles y europeos, y generar conocimiento y tecnología para transferirlos a la sociedad. Somos Centro de Excelencia Severo Ochoa, miembros de primer nivel de la infraestructura de investigación europea PRACE (Partnership for Advanced Computing in Europe), y gestionamos la Red Española de Supercomputación (RES). Como centro de investigación, contamos con más de 456 expertos de 45 países, organizados en cuatro grandes áreas de investigación: Ciencias de la computación, Ciencias de la vida, Ciencias de la tierra y aplicaciones computacionales en ciencia e ingeniería.
1. Team NatSat
InSPiRESat Presentation
2016 INSPIRE Workshop
July 21, 2016
Team Members:
Aubrey Harris III
Antonio Oliveira
Brendan Perry
Jake Sullivan
Presenters:
Linda Schmidt
Amanda Slagle
1
2. Outline
• Mission Design and Sequencing
• Launch Vehicle and Propulsion
• Structure
• Electrical Power System (EPS)
• Thermal Control System
• Attitude Control System (ACS)
• Command & Data Handling (C&DH)
• Telecommunications
• Risks
• System Block Diagram
2
6. Launch Vehicle
• Polar Space Launch Vehicle (PSLV)
• Provided by Indian Space Research Organization (ISRO)
• 600 km circular orbit
• Proven Launch History
• 33/35 successful on-orbit
deliveries
6
8. Structural Conceptual Design
● Resist loads imposed during launching phase and minimize
deformation that could impair the functionality of the solar
panels and mechanisms
● Remain functional at the temperature range from -80°C to
+120°C
● Avoid damaging or transmitting excessive loads to the payload
during the launching phase
● Provide enough damping in the solar panels for the proper
operation of the Attitude Control System
8
12. FEA Analysis
Stress (MPa) Frame Spider
Von Mises 45 70
Maximum Principal 52 75
Displacement (mm)
Total displacement 0.01 0.39
Maximum X 0.04 -0.07
Maximum Y -0.01 -0.39
Maximum Z +/-0.04 ~0
12
13. Electrical Power System (EPS)
Requirements
• The EPS system shall provide a nominal voltage
level & sufficient power to the spacecraft
• The EPS system shall employ electrical fault
protection
• The EPS system shall provide telemetry to determine
payload power consumption to within 1 W
13
18. Thermal Control Requirements
• NatSat thermal management system shall ensure
that all subsystem components remain within
operational temperatures
• Cryocooler radiator shall remain below -20°C while
dissipating 2W of power
Instrument Temperature Range (°C)
DWTS Cryocooler Radiator < -20
Nanopower BPX Battery -5 to 20
Solar Arrays -150 to 100
P60 Power Module -40 to 85
ISIS On Board Computer -25 to 65
BCT XACT ACS -20 to 50
Tethers SLX+UTX Transceiver -20 to 50
18
19. Thermal Environment During Orbit
• Approximate time of orbit: 96 minutes
• Illuminated: 60 minutes
- Direct Solar
- Albedo
- Earth IR
- Internal Heat Dissipation
• Shadow: 36 minutes
- Earth IR
- Internal Heat Dissipation
19
20. NatSat Thermal Control
• 1st order min and max temperature calculations:
• Solar arrays
• Cryocooler radiator
• External structure
- Iterations of materials
Material Coverage % Max Temp °C Min Temp °C Absorbance Emissivity
Polished 6061 Aluminum 100 310 255 0.2 0.03
Black Paint 100 28 -34 0.98 0.87
White Paint 100 -9 -33 0.25 0.9
Silverized FEP Teflon 100 -6 -20 0.08 0.66
OSR Quartz Over Silver 100 -16 -29 0.077 0.79
Black/White Checkered 100 10 -35 0.61 0.89
Aluminized FEP Teflon 100 -11 -30 0.16 0.8
6061 Alum/FEP Teflon 25/75 6 -15 0.17 0.61
6061 Alum/FEP Teflon 50/50 32 7 0.18 0.42
6061 Alum/FEP Teflon 40/60 21 -3 0.18 0.49
20
23. NatSat Thermal Control System
* Contingent
upon lab testing
Equipment Manufacturer Surface Area (cm²) Mass (g) Power (W)
AZ93 White Paint AZ Technologies 1200 29
6061 Aluminum Local Procurement 2675 658
FEP Teflon Fluorogistx 1485 49
OSR Quartz over Silver Radiator Qioptiq 400 23
Battery Heater GOMSpace *6
Total 759 *6
• Thermal control of NatSat is achieved with a
fully passive system
• Simple, low risk design
23
24. Attitude Determination and Control
• NatSat Attitude Determination and Control (ACS) shall
provide sufficient control authority, accuracy, and
stability to accomplish the mission science objectives
• ACS responsibilities include:
• De-tumbling after launch vehicle separation
• Maintaining accurate pointing knowledge
• Maintaining stable attitude
• Orienting vehicle for science operations
• Slewing vehicle for payload calibration
• Re-orienting vehicle to protect spacecraft optics
24
26. ACS Control Performance
• ACS must reject disturbance torques and store momentum
• Worst-Case Disturbance Torque Estimates:
• External Torques: 1.16 x 10-6 N-m
• Internal Torques: 8.28 x 10-5 N-m
• Total: 8.40 x 10-5 N-m (RW maximum: 4 x 10-3 N-m)
• Momentum Accumulation
• External Torques: 6.74 x 10-3 N-m-s per orbit
• Internal Torques: 8.28 x 10-5 N-m-s per orbit
• RW Capacity: 1.374 x 10-2 N-m-s
• Momentum dump after 2 orbits (BOL) or 1.5 orbits (EOL)
• Likely longer given conservative estimates
26
27. ACS Control Performance
• ACS must provide slew rate for sensor calibration
• Single RW can provide 4 mN-m for 3.44 sec
• Minimum slew rate:
• Largest vehicle moment of inertia: 0.5305 kg-m2
• Angular Acceleration: 0.432 deg/s2
• Angular Rate: 1.49 deg/s
• NatSat ACS provides sufficient attitude knowledge
accuracy, stability, and control authority to
accomplish the science mission objectives
27
28. Command and Data Handling
Requirements
● Adequate command and data handling for
spacecraft control and configuration and
system health and status data gathering
● Storage and playback of 120 hours of data
● Storage and execution of 2 days of sequence
commands
● Autonomous initialization
● Reprogrammability
28
31. System Architecture
• Processing
distributed among
C&DH, EPS, ACS,
and Telecomm
subsystems
• Time slice
architecture
Store
DWTS
data
Store
commands Check
command
buffer
Collect
subsystem
health &
statusAssemble
telemetry
packets
Send
telemetry
Check for
anomalies
Pet
watchdog
31
32. C&DH Modes and Safing
• Launch: detumble, enable Telecomm and
ACS, achieve power positivity
• Operational: collect and transmit science and
engineering data, monitor system health
•Safe: conserve power, transmit limited
engineering data, recover from anomalies
•limit monitors
•watchdog
32
33. Telecommunication
• Dual S-Band and UHF capabilities to meet daily data
requirements and minimize power usage
• Prioritizing S-Band for downlink and UHF for uplink
• Total daily coverage to 4 ground stations ~ 108
minutes with a maximum single pass of 14 minutes
• Utilizing existing ground station infrastructure to
include 3m and 6.1m dish
• Link Margin > 30 dB
33
36. Telecommunication
• Utilize S-Band patch antenna with 6 dB of gain and
UHF dipole antenna with 0 dB of gain
• Customized 1U antennas both mounted to the nadir
36