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 Determination Ankit 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
Fabrication Austin 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 & Software Brigette 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 amplification o Multiplexers for multiple solar panel implementation o Power & Pin Routing
Hardware Pololu IMU EK-LM4F120XL
Software Programming Platform: Code Composer Studio Programming Language: C o Widely supported across Microprocessors Desired Features: o Real-Time Implementation o Analog to Digital Converter (ADC) o I 2 C o 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 I 2 C 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