cavs flight simulator mid-semester presentation senior design october 5, 2010
TRANSCRIPT
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CAVS Flight Simulator
Mid-Semester PresentationSenior DesignOctober 5, 2010
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Rebecca Owens Team Leader
Computer EngineeringPCB Design
Gauge & Throttle Software
Amol PatelElectrical Engineering
Mechanical DesignWiring
Candace AllgoodComputer Engineering
PCB DesignGauge & Throttle
Software
Ebi IzonfuoElectrical Engineering
Mechanical DesignWiring
Dr. J.W. BruceAcademic Advisor Sponsor
Our Team
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Outline
• Problem Statement• Solution• Technical Design Constraints• Practical Design Constraints• System Overview• Design Refinements• Testing Plan• PCB & Packaging
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Problem
• Our sponsor, CAVS, primarily researches problems with vehicles and human factors relating to vehicular systems
• CAVS does not currently have a device to perform aviation research
• CAVS wants to convert a cockpit familiarization trainer into a working, realistic simulator
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Solution
• Design gauges and throttle to integrate with the current hardware of the cockpit.
• Use data fromMicrosoft FlightSimulator to drive the instruments
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GaugesGauges
SwitchesSwitches
YokeYoke
ThrottleThrottle
Rudder Pedals
Rudder Pedals
The T-37 Cockpit
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Constraints
• Technical Constraints• Practical Constraints
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Technical Constraints
Name Description
Gauges The device must implement five flight gauges for display (airspeed, fuel quantity, climb, compass, and altimeter).
System Response The device must appear to be real-time and have a delay of < 20 ms.
Voltage The device must be wall-powered.
Interface The device must interface with Microsoft Flight Simulator.
Input The device must implement a dual-engine throttle control with flaps.
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Practical Constraints
Name Category Description
Economic Affordability
The device must be manufactured for less than $1,500
Sustainability
Maintenance
The device must require little maintenance
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Economic
• Budget: $1500• Needed Items:− MFS / FSUIPC− Yoke− Stepping Motors− PCB Manufacturing− Assorted Electrical Components
• Competitor’s Price: ~$37,000
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Sustainability
• End Users: Researchers and Pilots• Knowledge of End Users• Reliable Hardware• Reliable Software and Data
Communication
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System Overview
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Design Changes / Refinements• Altimeter− Needed a device
that could reproduce a clock movement using metric steps
− Metric Clock• Internal hand
driving mechanism can be bypassed
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Test Plan
• PCB• Wiring• CAN messages• Motor Drive & reset• Mechanical Linkages & Switches• Full System Test
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Testing
• PCB− Footprints, component placement− Continuity & Shorts− Subsystem testing
• Power supply• Microcontroller• Motor Driver Chip• CAN transceiver
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Testing
• Wiring− Gauge
• IR sensor• Stepper Motor• Power / CAN• External GPIO
− Enclosure• Potentiometers• Switches
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Testing
• CAN Messages− Simple echo test to confirm communication
between device and PC.• Motor Drive & Reset− Test drive command− Check accuracy− Fine-tune IR positioning for home position
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Testing
• Mechanical linkages & Switches− Mechanical durability− Linkage Range of Motion− Switches mounted and wired for correct
on/off operation• Full System Test− All components are wired and powered on− Every function is evaluated, i.e. gauge,
throttle movement, switch actuation
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Printed Circuit Board
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Printed Circuit Board
• Ground Plane for heat dissipation
• 2.5” X 2.5”• Octagonal
shape designed to fit in circular enclosure
• Mostly surface mount
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Printed Circuit Board
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Packaging
Mounting Plate and Screws
Face plate and needle
Line Sensor
Stepper Motor
Mounting Brackets
Printed Circuit Board
Circular Connector
Cylindrical EnclosureRemovable Cap
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Packaging
Left: PCB mounted with stepper motor
Right: PVC enclosure for gauge
PVC enclosure with threaded cap removed.
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Packaging
• Internal rotational mechanism
• Attach potentiometer to pivot via mechanical arm
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Packaging
• Linear Motion• Toe brakes – Revolute
Motion
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Packaging
Mechanical design for attaching potentiometers to linear and revolute joints
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Questions / Comments