Project ASCEND!Embry-Riddle Aeronautical University

Spring 2014

Team Organization

• Ankit Jain: Project Manager

• Ben Anderson: Assistant Project Manager

• Patrick Deskin: System Integrator

• Brigette Cochran: Software Engineer

• Dallas Hodge: Hardware Engineer

• Austin Leonard: Structural Engineer

• Loren Williams: Structural Engineer

Presentation Overview

• Project Overview

• Attitude Determination

• Computer Aided Design (CAD)

• Rapid Prototyping

• Fabrication

• Hardware

• Software

• System Integration

• Acknowledgments

Project Overview

• Accurate Attitude Determination

• Real-Time Implementation

• PCB Manufacturing

• 26-sided Structure

• Booms for Stabilization

• Standard Clamp Rod Attachment

Attitude DeterminationAnkit Jain – Project Manager

Attitude Determination

• 23 solar panels as sun sensors

• IMU consisting of a 3-axis rate gyroscope and 3-axis accelerometer

• Rate gyroscope data is integrated

• Each time step, the integration is initialized with a quaternion solved using Wahba’s Problem between two independent vector measurements

CAD & Rapid Prototyping

Ben Anderson – Assistant Project Manager

Early CAD Design

CATIA V5 R17

Final CAD Design

Rapid Prototyping

FabricationAustin Leonard – Structural Engineer

Fabrication

• Bidirectional Carbon• NOMEX Honeycomb• 2/10” Styrofoam

Insulation• Lexan Plate for

Camera Window

Fabrication

• Epoxy

• Fiberglass Reinforcement

• Microballoons

• Velcro Door Mechanism

Hardware & SoftwareBrigette Cochran – Software Engineer

Hardware

• Microcontroller: TI-LM4F120XL

• IMU: Pololu AltIMU 10-DOF

• Solar Panels: Powerfilm Solar sponsored

• Printed Circuit Board (PCB) o Opamps for signal amplificationo Multiplexers for multiple solar panel implementationo Power & Pin Routing

Hardware

Pololu IMU

EK-LM4F120XL

Software

• Programming Platform: Code Composer Studio

• Programming Language: Co Widely supported across Microprocessors

• Desired Features:o Real-Time Implementationo Analog to Digital Converter (ADC) o I2Co External SD via SPI

Software

Current Software / Hardware

• Dr. Isenberg’s Data logging system utilizing a PIC Processor

• 3.3V and 5V Power Regulators

• IMU Board

• PCB - ExpressPCB

• Video Recorder

• Data Analysis: MATLAB

System Integration & Future Recommendations

Patrick Deskin – System Integrator

System Integration

• Brought together component subsystems into whole

• Made sure that the subsystems functioned together properly

• Wiring configuration of the solar panels

• Sun Vector Determination

Future Developments

• Recruit more software engineers

• Debug I2C

• Complete external SD & file system

• Real-time implementation

• Moving to C++ for Libraries Containing Array Math

• Attitude Control

Acknowledgements

• Jack Crabtree & ANSR - ERAU

• Dr. Gary Yale - ERAU

• Dr. Douglas Isenberg - ERAU

• Jim Weber – ERAU

• Dr. Brian Davis - ERAU

• Patrick David - ERAU

• Chris Smith – ERAU

• Ben Ellefson – Powerfilm Solar

• NASA Space Grant Interns