pdr presentation - lafayette college · pdr presentation team dyno(mite) acceptance test plan...
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PDR PresentationTeam Dyno(mite)
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Acceptance Test Plan● Sensors
○ 5 main metrics - Torque, speed, input voltage, output current, and system temperature
○ Will be tested by comparing results to manufacturers parameters
● Test Stand○ Mostly physical design, including standards and safety measures
● Interfaces○ Interfaces with every system○ Testable assuming the respective system in complete
● Power Supply○ Switchable sources with insulated connectors
● Safety○ Safety loop fallback○ Emergency stop button
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ATP - Sensors● Torque
○ Will be logged from the dynamometer○ The basis for generating a torque curve
● Speed○ Can be found in the motor encoder or controller frequency○ Sources will be compared for redundancy
● Motor Current○ Function of the motor controller for all three phases
● Controller Input Voltage○ Function of the motor controller○ Can be used to find the input current
● System Temperature○ Measured at various points, including inside the controller
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ATP - Test Stand● Includes physical design considerations
○ checked by redundant inspection:
● Cable management○ Based on the standards of GPR005
● MCS cooling system○ Must operate, but not necessarily well
● Physical design safety○ Shielded connector covers○ cable insulation
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ATP - Interfaces● Assumes that the other half of the interface is complete● VSCADA
○ Data regarding the sensor systems must be delivered accurately○ Verified by comparing to the locally logged data
● GLV Power○ Sensor systems○ VSCADA interface system
● TSV Load Controller○ Alternative power source
● Safety Loop○ The GLV safety loop must be able to shut the motor down
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ATP - Power Supply● The power supply must allow the motor to spin
○ Current draw figures will be collected
● Power supply switching○ The power supply must be swappable without contacting uninsulated
wiring
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ATP - Safety● Operational safety concerns should stop the motor
○ Ground Fault○ Overtemperature○ Overspin○ Overtorque
● Emergency stop must be hardwired into the test stand○ Disconnects the power supply from the motor controller
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Subsystem Hierarchy
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Requirements Matrix - Formula Hybrid Competition Rules● List of all relevant rules and requirements
that are set forth by the Formula Hybrid Competition○ Motor Parameters○ Motor Controllers○ Sensors○ Safety Concerns
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Requirements Matrix - VSCADA● Discusses the interactions between the
Dyno system and the VSCADA team○ Sensor integration○ Motor Controller
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Requirements Matrix - Motor, Controller, and Dynamometer Test Stand
● All requirements set forth in the Statement of Work in section R005 about the motor system○ Equipment Necessary○ Motor Parameters○ Independent Safety Loop○ Sensor Integration○ Power Supply
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Requirements Matrix - Safety Loop / TSV Load Controller● Proper cables and cabling practices shall be
used to ensure safety when the motor is operational and to power the system from the load controller
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System State Analysis● VSCADA will have primary state machine● In general, the motor control system will
have two main states○ On○ Off
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System State Analysis - “On” State● The system enters the “On” state when the
driver turns the car on and the car is ready to drive
● Forward or reverse acceleration is possible in this state
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System State Analysis - “Off” State● Idle state● Triggered by the driver turning the car off● Can also be triggered by certain safety
conditions○ Overtemp○ Overspin○ Overtorque○ Ground Fault○ Emergency Stop Button
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Cost Analysis
Cabling - assuming 0 gauge wire
Item Quantity Price Total
0 AWG (gage) wire - 50ft 1 $75.00 $75.00
Wire connector package 1 $50.00 $50.00
Temp sensor - DS18S20+CT-ND 5 $4.95 $24.75
Strain gage sensor - 1033-1004-ND 1 $60.00 $60.00
optical encoder - 102-1923-ND 1 $20.00 $20.00
A2D converter 5 $4.00 $20.00
Total: $249.75
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Risk Assessment● Biggest risk - team member(s) falling behind schedule. ● Late delivery of dynamometer manual ● Late delivery of remaining sensors purchased with
dynamometer○ Strain gauge, optical encoder, special data cable for feedback
information regarding valve in motor to control oil flow rate. ● Late deliverables from TSV group regarding battery
pack - could impact accuracy of models. ● Late deliverables from GLV regarding safety loop could
cause delays in integrating our safety loop with theirs to make a comprehensive system.
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Work Breakdown Schedule● Weekly Milestones● Student Tasks● Measurable and specific
Week 2Group
Finish PDR and Present
Steve
Hierarchical Subsystem breakdown and semester task breakdown
Alex Complete ATP
JohnRisk Assessment and Cost Analysis
Brendan Requirement Analysis
Nate System State Diagram