Team Vision for System-Level Design PhaseSummary:
Our team used this time to generate concepts using the tool given to us in class (Morphological Chart) and followed a structured decision making process to select the best concept. We additionally planned to develop a systems architecture and begin developing solutions to our proposed feasibility questions.
All of the above plans were achieved, except for the completion of the feasibility questions.
Link to the live document: SPAAV Functional Decomposition - Visio
- Power Generation
- Propulsion Method
- Position Data Hardware
- Single GPS RX
- Addition of IMU?
- Vessel Structure
- Communication Systems
- Vessel Control System (Brain)
- Single-Board Computer
Projects to Benchmark
- Scout (gotransat.com)
- MIT Scout
- ITA Brazil
|Benchmark||SCOUT (GoTransat.com)||MIT SCOUT||ENSIETA||Squirtle|
|Power Generation||solar-charged, lithium iron phosphate batteries||N/A||Li-Po (future plans for solar)||Solar 240 Watts, 12V gel electrolyte lead acid batteries|
|Propulsion Method||Electric trolling motor||Electric trolling motor||Sailing (two rudders)||2 DC Motors 13.6 Kilogram-force of static thrust each|
|Positioning Method||1 GPS receiver, and telemetry data||GPS and compass||GPS RX (EB-85A), HMC6352 compass, CV7 ultrasonic anemometer?||IMU & 2 GPS. 1 on board 1 on base station|
|Vessel Structure||a custom carbon fiber hull with a Divinycell foam core||A canoe||1.2m long custom fiberglass hull with keel, sail mast, etc.||a catamaran built from two kayak hulls adjoined by a structure of aluminium profiles|
|Communication Systems||Iridium satellite constellation||Wi-Fi & RF module||Adeunis ARF53 HF modems (no subscription, long dist.), IRIDIUM modem or SPOT messenger||high speed Wi-Fi for main long range Xbee for critical connection|
|Vessel Control System (Brain)||2 Arduino microcontrollers||Arduino and computer||PIC18F2550, perhaps GSM phone in future (Neo Freerunner) for WiFi, BT, GSM, accelerometers, and embedded Linux (Debian).||ODROID-X2 quad-core ARM @ 1.7GHz for processing & Arduino for motor control|
- Sail-based boat, future entry into MicroTransat
- Attempted to use COTS components if possible
- No power generation at present, planned solar in the future
- Total cost
- Solution Feasibility
- Time to Implement
- Total Power Consumption/Harvesting
- Total Weight
The link for document is below.
Feasibility: Prototyping, Analysis, Simulation
- How much power can we generate? -Matt H.
- How much thrust do we need to propel the boat forward? - Matt W.
- How fast can the boat move while still obtaining reliable sensor data? - Erika
- What is the maximum weight our boat can support? - Tyler
- What is the maximum energy storage we can support (weight to power ratio)? - Andy
- How accurate of an absolute position we can achieve? - Zeyar
- How far can we reliably communicate with our boat? - Max
Means of Answering Feasibility QuestionsNumber corresponds to numbered feasibility questions from above section.
- Scaled experiments and extrapolation of results
- Newton's Second Law - thrust = drag force (include wind speed) + wave force. Assume boat as both a pontoon and v-hull design.
- Benchmark response times from different sensors
- Newton's Second Law - buoyancy force
- Benchmark different battery types
- Benchmark the accuracy of different positioning systems
- Benchmark the ranges of different communication systems
System Level Design ReviewSystem Design Review Presentation
Plans for next phaseFor us, this phase will focus on obtaining subsystem level components and characterizing them.
Below is a screenshot of our project schedule that focuses on the upcoming weeks.
A link to the live project schedule can be found here Project Schedule - MS Project file
In summary, the key items for our team to accomplish this portion are:
- Pick-up boat
- Repair the trolling motor
- Obtain solar panels from Alfred State College
- Obtain additional sponsors
- Begin subsystem prototyping and testing proof-of-concept