VERTIGO 2 Critical Design Presentation December 1, 2004.

VERTIGO2 Critical Design Presentation

December 1, 2004

Team Members

ECE Team

Mimi Phan (ECE Team Leader)

Kevin Boyce

Jeff Laub

Tebo Leburu

Prateek Mohan

Ryan Strauss

Duroseme Taylor

Calvin Turzillo

AE Team

Nikhil NairLuke Alexander (Project Leader)

CS Team

Chris Fernando

VERTIGO² Project Manager

Luke Alexander

VERTIGO² Project Manager

Luke Alexander

ECE CoordinatorMimi Phan

ECE CoordinatorMimi Phan

Circuitry GroupKevin Boyce

Calvin TurzilloPrateek MohanTebo Leburu

Jeff Laub

Circuitry GroupKevin Boyce

Calvin TurzilloPrateek MohanTebo Leburu

Jeff Laub

Programming GroupRyan Struass

Prateek MohanMimi Phan

Duro TaylorChris Fernando

Programming GroupRyan Struass

Prateek MohanMimi Phan

Duro TaylorChris Fernando

Web GroupPrateek Mohan

Mimi Phan

Web GroupPrateek Mohan

Mimi Phan

Team Organization

Introduction

VERTIGO—Versatile Exploratory Robotic Tilt-rotor for Information Gathering Operations—is a small dual mode aircraft designed as a VTOL aircraft with the ability to transition to normal horizontal flight. Many different projects have been undertaken to challenge the idea of a dual mode aircraft.

The advantages of utilizing both flight modes in one aircraft can be realized with a simple understanding of helicopter aerodynamics—namely the ratio of stability to altitude.

• Design and integrate a proper electrical system to ensure functionality• Design a simple, sufficient tilting mechanism for the rotor assemblies• Perform laboratory testing to verify aerodynamics and functionality• Achieve vertical flight and vertical maneuverability• Land

Objectives

Primary Objectives

Secondary Objectives

• Transition to horizontal flight via tilting mechanism• Return to vertical flight• Land without catastrophe

Technical Overview

• Base Station: Laptop w/ Joystick and transmitter

• Onboard Control

System Overview

Base Station• Laptop: receives serial input from joystick, and send command

out serial port to transmitter• Joystick: user input• Transmitter: serial communication to onboard system

Onboard System• Receiver: serial communication from base station• Microcontroller: interprets signals from receiver and outputs to

proper device• Servos: control position for airfoils and blade position• Motors: spin the propellers• Gyro: used for stabilizing aircraft• Wireless Camera: not integrated into system-just live video

Circuitry Design

Software Overview

PIC Software• Written in PIC Basic Pro• Continuous loops monitor for changes in

servo position and motor speed

Base Station Software• Written in C++• Takes user input from joystick and converts to

a serial signal that PIC can interpret

Reliability, Testability, & Manufacturability

•How reliable is our product? What is its expected lifetime?

•How will we test the product?

•What about manufacturability?

Reliability

Microchip’s PIC 18F4431 Microcontroller• Excessive Temperatures

• Random Voltage Spurts

• Limited Life for Onboard Flash Memory Card (5 to 10 years)

Saitek X45 Digital Joystick and Throttle• Breakage of Mechanical Parts

• Limited Life due to Wear and Tear

11.1V 2200mAH Lithium Ion Batteries• Chemical Imbalance

• Deterioration over Time (Batteries can lose charge over time.)

Reliability

433 MHz Dual-Mode RF Transmitter/Receiver Module

• Excessive Temperatures

• Random Frequency Transferences

• Limited Life (5 to 10 years)

Possible Problems Limiting Overall Product Life• Short Circuits

• Soldering Errors

• Dead on Arrival (DOA)

System ElementTest Point Location

 Purpose

Testing Summary

Test Equipment

Servo-motor/ controller module

Solder points Check for correct wiring.

Check solder points, and measure voltage.

Multimeter

Communications

Ensure that the right signals are being sent to the servos.

Send signals, and observe response.

Joystick Ensure the joystick is communicating with the laptop.

Observe coordinates from output.

Laptop

Transmitter/Receiver module

Serial Ports Ensure the serial ports are working.

Plug the transmitter/receiver, observe response.

PIC (monitor information being received)

Power System

Charge and Discharge Time

Ensure charge lifetime, power output.

Charge batteries, measure output and calculate charge time.

Voltmeter

Test Points

Number of Boards Produced

Cost for Production Run

Cost Per Board

3 $89.03 $29.68

12 $354.06 $29.50

27 $719.95 $26.66

51 $1,259.02 $24.69

102 $2,382.38 $23.36

300 $6,724.76 $22.42

501 $10,964.22 $21.88

1002 $21,469.12 $21.43

%58.5100.51$

31.26$

00.51$

69.24$00.51$

Cost and Gross Margin

Gross Margin

Bill of Materials

Item Quantity Price Cost Vendor

PIC Microcontrollers 1 $9.58 $9.58 Microchip

HVW Serial Receiver 1 $88.95 $88.95  HVW Technologies

HVW Serial Transmitter 1 $58.95 $59.95  HVW Technologies

Saitek X45 Digital Joystick and Throttle 1 $79.99 $79.99 Best Buy

Software 1 $300.00 $300.00  

ECE Materials 1 $250.00 $250.00  

AE/MAE Materials 1 $200.00 $200.00

Battery Charger 1 $119.00 $119.00  Tower Hobbies

JR4131 Servos 2 $159.98 $319.96

JR3121 Servos 2 $159.98 $319.96

Hacker C50-13L Motor 2 $188.00 $376.00

Hobbico CS-80 Servo 1 $159.98 $159.98

Hacker Master 77-3P Opto Motor Controller

2 $219.00 $438.00

11.1 Lithium Ion Batteries (per cell) 8 $58.95 $471.60 Batteries America

3.71 Lithium Ion Batteries (per cell) 20 $14.95 $299.00 Batteries America

Astro Flight Cobalt 40 Geared Motor 1 $169.95 $169.95 Tower Hobbies

Printed Circuit Boards (assembled) 2 $29.68 $59.36

$3192.46

Financial Status

Florida Tech Electrical and Computer Engineering Department

$200

Florida Tech Mechanical and Aerospace Engineering Department

$200 with an additional $400

*Currently in the process of finalizing sponsors and funding.

Budgeted Hours

Name Hours Worked Hours Budgeted Percentage Worked

Mimi Phan 66.5 72 92.36%

Kevin Boyce 31.5 72 43.75%

Jeff Laub 12 72 16.67%

Tebo Leburu 25 72 34.72%

Prateek Mohan 32 72 55.56%

Ryan Strauss 20.75 72 28.81%

Duroseme Taylor 20 72 27.78%

Calvin Turzillo 31 72 43.06%

Total 99.5 576 43.26%

Questions?