View
22
Download
0
Category
Tags:
Preview:
DESCRIPTION
SSOL: Radio Telescope IRP Presentation. Team Ongo-02c December 6, 2006 Client: Iowa Space Grant Consortium Advisor: Dr. Basart. Second Semester Students : Katie Hulet (EE) Phil Reusswig (EE) Mike Blasi (CprE) First Semester Students : Joel Leyh (EE) Ehsan Rehman (EE) - PowerPoint PPT Presentation
Citation preview
SSOL: Radio SSOL: Radio TelescopeTelescope
IRP Presentation IRP PresentationTeam Ongo-02cTeam Ongo-02c
December 6, 2006December 6, 2006
Client: Iowa Space Grant ConsortiumClient: Iowa Space Grant Consortium
Advisor: Dr. BasartAdvisor: Dr. Basart
Team MembersTeam MembersSecond SemesterSecond Semester Students Students:: Katie Hulet (EE)Katie Hulet (EE) Phil Reusswig (EE)Phil Reusswig (EE) Mike Blasi (CprE)Mike Blasi (CprE)
First SemesterFirst Semester Students Students:: Joel Leyh (EE)Joel Leyh (EE) Ehsan Rehman (EE)Ehsan Rehman (EE) Srisarath Patneedi “Sunny” Srisarath Patneedi “Sunny”
(CprE)(CprE)Fick Observatory
Presentation OutlinePresentation Outline DefinitionsDefinitions
AcknowledgementsAcknowledgements
Problem StatementProblem Statement
Operating EnvironmentOperating Environment
Intended Users and UsesIntended Users and Uses
End ProductEnd Product
Assumptions and LimitationsAssumptions and Limitations AccomplishmentsAccomplishments
Project ActivitiesProject Activities
Resource RequirementsResource Requirements
Lessons LearnedLessons Learned
Closing SummaryClosing Summary Radio Telescope
List of DefinitionsList of Definitions DAQ: Data acquisition
Shaft angle encoder: Electro-mechanical device used to convert the angular position of a shaft or axle to a digital code
Impedance: Measure of opposition to electric current
propagation in a transmission line.
Azimuth: The measurement of the horizontal movement of the dish
Elevation: The measurement of the vertical movement of the dish
AcknowledgmentsAcknowledgments
Financial support:• Iowa Space Grant Consortium• Dr. John Lamont and Prof. Ralph Patterson III
Advising:• Dr. John P. Basart
Problem StatementProblem Statement
Conversion of satellite tracking equipment into a radio telescope at the Fick Observatory in Boone, IA
Telescope needs to be operable from a remote location, via the Internet
Operating EnvironmentOperating Environment
Amplification system is to be placed outdoor where temperatures ranges from -20°F to 110°F with possibility of snow, ice and strong wind
Vulnerability to lightning which could lead to signal interference and equipment damage
Remaining part of the system will be held indoors at regular room temperature
Intended Users and Intended Users and UsesUses
Intended Users:Intended Users:
Faculty and researchers in astronomyFaculty and researchers in astronomy Astronomy studentsAstronomy students
Intended Uses:Intended Uses:
Radio mapping of the sky at frequency Radio mapping of the sky at frequency around 1420 MHzaround 1420 MHz
Tracking celestial objectsTracking celestial objects Data collectionData collection
End Product End Product Description Description
408 MHz
1420 MHz
10 GHz
A radio telescope to be used by the ISU community that can accurately track & record data from celestial objects with remote operation capabilities.
Assumptions & Assumptions & LimitationsLimitations
Assumptions:Assumptions:
1420 MHz is an appropriate frequency 1420 MHz is an appropriate frequency for radio astronomyfor radio astronomy
Dish will pick up relevant signalsDish will pick up relevant signals
Motors and gearboxes are capable of Motors and gearboxes are capable of precise movementprecise movement
The software and hardware developed by The software and hardware developed by previous semesters work as intendedprevious semesters work as intended
Assumptions & Assumptions & LimitationsLimitations
Limitations:Limitations:
Dish unable to be positioned to true northDish unable to be positioned to true north
Positioning accuracy dependant on motors and Positioning accuracy dependant on motors and gearsgears
Radio sources less than 2.5 degrees apart appear Radio sources less than 2.5 degrees apart appear as one source due to beam width of the dishas one source due to beam width of the dish
Weather conditions limit the work that can be done Weather conditions limit the work that can be done on the exterior components of the dishon the exterior components of the dish
The dish, mount and other fixtures are The dish, mount and other fixtures are irreplaceableirreplaceable
Fick Observatory is nearly 20 miles away from ISUFick Observatory is nearly 20 miles away from ISU
Phil ReusswigPhil Reusswig DefinitionsDefinitions
AcknowledgementsAcknowledgements
Problem StatementProblem Statement
Operating EnvironmentOperating Environment
Intended Users and UsesIntended Users and Uses
End ProductEnd Product
Assumptions and LimitationsAssumptions and Limitations AccomplishmentsAccomplishments
Project ActivitiesProject Activities Motor control automationMotor control automation Impedance matchingImpedance matching Shaft angle encoderShaft angle encoder Web serverWeb server Scanning and positioning software improvementsScanning and positioning software improvements
Resource RequirementsResource Requirements
Lessons LearnedLessons Learned
Closing SummaryClosing Summary
Previous AccomplishmentsPrevious Accomplishments
Installation of dish, motors and other mechanical Installation of dish, motors and other mechanical fixturesfixtures
Major electrical work for motors and positioning Major electrical work for motors and positioning system system
Purchase of radio receiver systemPurchase of radio receiver system
Preliminary software for operating the telescope Preliminary software for operating the telescope
Last Semester’s Last Semester’s AccomplishmentsAccomplishments
Static IP address for observatoryStatic IP address for observatory
Diagnosis and repair of faulty electronic componentsDiagnosis and repair of faulty electronic components
Research module to remotely control telescope’s Research module to remotely control telescope’s power systemspower systems
Integration of existing software componentsIntegration of existing software components
Design and implementation of automatic scheduling Design and implementation of automatic scheduling softwaresoftware
Obtained telescope’s first raster scans Obtained telescope’s first raster scans
Current AccomplishmentsCurrent Accomplishments
Motor control automationMotor control automation
Impedance matchingImpedance matching
Shaft angle encoderShaft angle encoder
Web server for remote access via a webpageWeb server for remote access via a webpage
Scanning and positioning software improvementsScanning and positioning software improvements
Project ActivitiesProject ActivitiesMotor control automationMotor control automation
Problem:Problem: Currently power is locally manually controlledCurrently power is locally manually controlled
Fick Observatory is in Boone, IAFick Observatory is in Boone, IA
Project ActivitiesProject ActivitiesMotor control automationMotor control automation
Approaches considered:Approaches considered: Leave power on continuouslyLeave power on continuously
Automate power supply via relays, FET, or BJT Automate power supply via relays, FET, or BJT by means of computerby means of computer
Project ActivitiesProject ActivitiesMotor control relayMotor control relay
Joel LeyhJoel Leyh DefinitionsDefinitions
AcknowledgementsAcknowledgements
Problem StatementProblem Statement
Operating EnvironmentOperating Environment
Intended Users and UsesIntended Users and Uses
End ProductEnd Product
Assumptions and LimitationsAssumptions and Limitations AccomplishmentsAccomplishments
Project ActivitiesProject Activities Motor control automationMotor control automation Impedance matchingImpedance matching Shaft angle encoderShaft angle encoder Web server Web server Scanning and positioning software improvementsScanning and positioning software improvements
Resource RequirementsResource Requirements
Lessons LearnedLessons Learned
Closing SummaryClosing Summary
Project ActivitiesProject ActivitiesImpedance matchingImpedance matching
Problem:Problem: This is the first semester the team had the This is the first semester the team had the
opportunity to quantitatively look at the system opportunity to quantitatively look at the system signal and losses.signal and losses.
The feed horn is not matched to the coax line The feed horn is not matched to the coax line running to the amplifier. This is a source of signal running to the amplifier. This is a source of signal loss.loss.
The process of impedance matching will result in The process of impedance matching will result in the best possible signal strength, and the best the best possible signal strength, and the best possible data for the user.possible data for the user.
Project ActivitiesProject ActivitiesImpedance matchingImpedance matching
Approaches considered:Approaches considered: Stub tunerStub tuner
Simple length of coax placed on the lineSimple length of coax placed on the line Required to know parameters of the feed hornRequired to know parameters of the feed horn
Adjustable shorting plateAdjustable shorting plate Already permanently installed in the dishAlready permanently installed in the dish Brute force method of tuning – we need to track the Brute force method of tuning – we need to track the
Sun!Sun!
Project ActivitiesProject ActivitiesImpedance matchingImpedance matching
Project ActivitiesProject ActivitiesImpedance matchingImpedance matching
ResultsResults
320320
Minimum - 35 Minimum - 35 120 120 210 210 140 140
210210
Maximum - 550Maximum - 550410410
The best position from the analysis was at the limit of the adjustment, which allowed for greatest distance between the monopole and shorting plate.
AttenuatorAttenuator The previous semester noticed a problem when The previous semester noticed a problem when
the sun was scanned, in which the intensity the sun was scanned, in which the intensity dropped to zero. The signal was overpowering dropped to zero. The signal was overpowering the receiver.the receiver.
Before After 3dB attenuation
Ehsan RehmanEhsan Rehman DefinitionsDefinitions
AcknowledgementsAcknowledgements
Problem StatementProblem Statement
Operating EnvironmentOperating Environment
Intended Users and UsesIntended Users and Uses
End ProductEnd Product
Assumptions and LimitationsAssumptions and Limitations AccomplishmentsAccomplishments
Project ActivitiesProject Activities Motor control automationMotor control automation Impedance matchingImpedance matching Shaft angle encoderShaft angle encoder Web serverWeb server Scanning and positioning software improvementsScanning and positioning software improvements
Resource RequirementsResource Requirements
Lessons LearnedLessons Learned
Closing SummaryClosing Summary
Project ActivitiesProject ActivitiesShaft angle encoderShaft angle encoder
Problem:Problem: Current positioning system based on Current positioning system based on
potentiometerpotentiometer
Output is an analog signal which is susceptible to Output is an analog signal which is susceptible to various forms of electrical noisevarious forms of electrical noise
Positioning system must have higher resolution Positioning system must have higher resolution than 0.1°than 0.1°
Project ActivitiesProject ActivitiesShaft angle encoderShaft angle encoder
Approaches considered:Approaches considered: Shaft Angle EncoderShaft Angle Encoder
AbsoluteAbsolute IncrementalIncremental
Intuitive Binary Intuitive Binary EncodingEncoding
Gray Binary EncodingGray Binary Encoding
Project ActivitiesProject ActivitiesShaft angle encoderShaft angle encoder
Intuitive EncodingIntuitive Encoding
SectorSector Contact Contact 11
Contact Contact 22
Contact Contact 33
AngleAngle
11 OffOff OffOff OffOff 0-450-45
22 OffOff OffOff OnOn 45-9045-90
33 OffOff OnOn OffOff 90-13590-135
44 OffOff OnOn OnOn 135-135-180180
55 OnOn OffOff OffOff 180-180-225225
66 OnOn OffOff OnOn 225-225-270270
77 OnOn OnOn OffOff 270-270-315315
88 OnOn OnOn OnOn 315-315-360360
Gray EncodingGray Encoding
SectorSector Contact Contact 11
Contact Contact 22
Contact Contact 33
AngleAngle
11 OffOff OffOff OffOff 0-450-45
22 OffOff OffOff OnOn 45-9045-90
33 OffOff OnOn OnOn 90-13590-135
44 OffOff OnOn OffOff 135-135-180180
55 OnOn OnOn OffOff 180-180-225225
66 OnOn OnOn OnOn 225-225-270270
77 OnOn OffOff OnOn 270-270-315315
88 OnOn OffOff OffOff 315-315-360360
Images courtesy of Wikipedia.com
Line DriverLine Driver Line noise reductionLine noise reduction
Mike BlasiMike Blasi DefinitionsDefinitions
AcknowledgementsAcknowledgements
Problem StatementProblem Statement
Operating EnvironmentOperating Environment
Intended Users and UsesIntended Users and Uses
End ProductEnd Product
Assumptions and LimitationsAssumptions and Limitations AccomplishmentsAccomplishments
Project ActivitiesProject Activities Motor control automationMotor control automation Impedance matchingImpedance matching Shaft angle encoderShaft angle encoder Web serverWeb server Scanning and positioning software improvementsScanning and positioning software improvements
Resource RequirementsResource Requirements
Lessons LearnedLessons Learned
Closing SummaryClosing Summary
Project ActivitiesProject ActivitiesWeb serverWeb server
Problem:Problem:
Currently remote access is limited to Windows remote desktopCurrently remote access is limited to Windows remote desktop
Need a user friendly remote interface for telescope controlNeed a user friendly remote interface for telescope control
Limit access to authorized usersLimit access to authorized users
Project ActivitiesProject ActivitiesWeb serverWeb server
Design:Design: LabVIEW built-in web server with internet toolkitLabVIEW built-in web server with internet toolkit
Remote power relay must be installedRemote power relay must be installed
Fick Laboratory (Boone, Iowa)
User accessing the control box from a remote location
SERVER
MOTOR CONTROL BOX
Project ActivitiesProject ActivitiesWeb serverWeb server
Implementation:Implementation: Configure network settings in LabVIEW and routerConfigure network settings in LabVIEW and router
LabVIEW must be running to host websiteLabVIEW must be running to host website
Convert LabVIEW modules to web compatible versionConvert LabVIEW modules to web compatible version
Project ActivitiesProject ActivitiesWeb serverWeb server
Project ActivitiesProject Activities Scanning and positioning software Scanning and positioning software
improvementsimprovementsProblem:Problem: Raster scan needs to output intensity values to fileRaster scan needs to output intensity values to file
Raster scan needs real time gauges during scanningRaster scan needs real time gauges during scanning
Positioning software is inaccuratePositioning software is inaccurate
Project ActivitiesProject Activities Scanning and positioning software Scanning and positioning software
improvementsimprovementsImplementation:Implementation: Add gauges and file output to raster scan using Add gauges and file output to raster scan using
LabVIEWLabVIEW
Project ActivitiesProject Activities Scanning and positioning software Scanning and positioning software
improvementsimprovementsImplementation:Implementation: Verify astronomical equations in positioning Verify astronomical equations in positioning
softwaresoftware
Sunny Sunny PatneediPatneedi DefinitionsDefinitions AcknowledgementsAcknowledgements Problem StatementProblem Statement Operating EnvironmentOperating Environment Intended Users and UsesIntended Users and Uses End ProductEnd Product Assumptions and LimitationsAssumptions and Limitations AccomplishmentsAccomplishments Project ActivitiesProject Activities Resources and ScheduleResources and Schedule
Schedule Schedule Personal EffortPersonal Effort Financial RequirementsFinancial Requirements
Closing MaterialsClosing Materials Project EvaluationProject Evaluation Future ActivitiesFuture Activities Lessons LearnedLessons Learned Risks & Risk ManagementRisks & Risk Management Closing SummaryClosing Summary Questions ?Questions ?
ScheduleScheduleRemote Motor Control Box
Testing 14 days 9/16/2006 9/29/2006
Implementation 16 days 9/30/2006 10/15/2006
Documentation 9 days 10/16/2006 10/22/2006
Power Supply Stabilization
Research 14 days 9/25/2006 10/8/2006
Implementation 7 days 10/9/2006 10/16/2006
Documentation 5 days 10/16/2006 10/20/2006
Raster Scan
Modification 42 days 9/11/2006 10/25/2006
Documentation 6 days 10/22/2006 10/28/2006
Positioning Software
Modification 53 days 10/9/2006 12/9/2006
Documentation 6 days 12/4/2006 12/9/2006
Shaft Angle Encoder
Research 15 days 9/18/2006 10/2/2006
Documentation 6 days 10/2/2006 10/8/2006
Impedence Matching
Research 43 days 9/10/2006 10/22/2006
Implementation 26 days 10/23/2006 11/17/2006
Documentation 5 days 11/27/2006 12/1/2006
Web Server
Implementation 87 days 9/4/2006 12/8/2006
Documentation 12 days 11/27/2006 12/8/2006
Website 66 days 9/25/2006 12/8/2006
Maintenance of Fick 5 days 12/4/2006 12/8/2006
Documentation 5 days 12/4/2006 12/8/2006
11 18 25 2Task Name Duration Start Finish 6 139 16 420 27Dec-06
21 28 4Aug-06 Sep-06 Oct-06 Nov-06
23 30
Personal EffortPersonal Effort
Member Estimated Actual
Katie Hulet 95 94
Phil Reusswig 96 80
Mike Blasi 94 87
Joel Leyh 87 72
Srisarath Patneedi 87 80
Ehsan Rehman 82 66
Semester Total 541 hours 479 hours
Financial BudgetFinancial Budget
ItemItemW/OW/OLaborLabor With LaborWith Labor
Previous School Previous School SessionsSessions $4,037.00$4,037.00 $4,037.00$4,037.00
AttenuatorAttenuator $150.00$150.00 $300.00$300.00
Relay connectorsRelay connectors $10.00$10.00 $40.00$40.00
RackRack $70.00$70.00 $100.00$100.00
MileageMileage $200.00$200.00 $200.00$200.00
Subtotal:Subtotal: $4,537.00$4,537.00 $4,897.00$4,897.00
Labor at $15.00/hrLabor at $15.00/hr
Previous School Previous School SessionSession $53,892.00$53,892.00
Current semesterCurrent semester
$7,185.00$7,185.00
Total:Total: $4,537.00$4,537.00 $61,077.00$61,077.00
Project EvaluationProject EvaluationMilestonesMilestones RelativeRelative
ImportanceImportance
EvaluationEvaluation
ScoreScore
ResultantResultant
ScoreScore
Teaching LabVIEW to new Teaching LabVIEW to new studentsstudents
5%5% 75%75% 3.75%3.75%
WebserverWebserver 10%10% 66%66% 6.66%6.66%
Remote activation of the Remote activation of the motor control boxmotor control box
20%20% 33%33% 6.66%6.66%
Raster scan software Raster scan software updateupdate
15%15% 66%66% 10%10%
Shaft angle encoderShaft angle encoder 5%5% 100%100% 5%5%
Power supply stabilizationPower supply stabilization 10%10% 80%80% 8%8%
Impedance matchingImpedance matching 10%10% 80%80% 8%8%
Positioning softwarePositioning software 20%20% 75%75% 15%15%
Website maintenanceWebsite maintenance 5%5% 100%100% 5%5%
TotalTotal 100%100% 68%68%
Future Required Future Required ActivitiesActivities
Integrate an automated power management solution
Combine all software into a user-friendly web-based interface
Calibrate system for accurate positioning
Continue improving software interactivity with hardware
Lessons LearnedLessons Learned
Technical:Technical: Positing system of the dishPositing system of the dish Shaft Angle encoders, PotentiometersShaft Angle encoders, Potentiometers Impedance matching Impedance matching LabVIEW concepts and standardsLabVIEW concepts and standards
Non-Technical:Non-Technical: The importance of team planning and communicationThe importance of team planning and communication Making decisions as a groupMaking decisions as a group Importance of clear and concise documentationImportance of clear and concise documentation Importance of time and task managementImportance of time and task management
Risks & Risk Risks & Risk ManagementManagement
Risk of shock or electrocution while working on the motor control box Power should be disconnected before beginning work
Loss of software or any vital data for the project Regularly create backups
Loss of team member Obtain information about his/her activities from their
log book
Closing SummaryClosing Summary The purpose of this project is to restore the dish so that The purpose of this project is to restore the dish so that
it will be fully operational for use in radio astronomy. it will be fully operational for use in radio astronomy.
This semester we have been working on :This semester we have been working on : Researching the usage of shaft angle encoders Researching the usage of shaft angle encoders
Building and integrating the relay system for remote activation Building and integrating the relay system for remote activation
of the control boxof the control box
Incorporating a web server and providing access via a web Incorporating a web server and providing access via a web
interfaceinterface
Resolving errors related to the positioning of the dishResolving errors related to the positioning of the dish
Upon completion of this project, the dish at Fick Upon completion of this project, the dish at Fick
Observatory will track and record data from celestial Observatory will track and record data from celestial
objects for use by the ISU community.objects for use by the ISU community.
Questions?
SSOL: Radio Telescope Team Ongo-02c
Recommended