Project ASCEND! Embry-Riddle Aeronautical University Spring 2014 Presented By: Ankit Jain – Project Manager.

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Presentation transcript:

Project ASCEND! Embry-Riddle Aeronautical University Spring 2014 Presented By: Ankit Jain – Project Manager

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 2

Presentation Overview Project Overview Computer Aided Design (CAD) & Rapid Prototyping Fabrication Hardware & Software Attitude Determination Flight Results Future Developments Acknowledgments 3

Project Overview Accurate attitude determination Real-time implementation PCB manufacturing 26-sided structure Booms for stabilization Standard clamp rod attachment 4

CAD & Rapid Prototyping

Early CAD Design CATIA V5 R17 6

Final CAD Design 7 Red: Switch Mount Blue: IMU and Power Regulator Mount Yellow: 9V Battery Mount Purple: PCB and Data Logger Mount Green: Camera Mount

Rapid Prototyping 8

Fabrication

Bi-directional carbon NOMEX honeycomb 2/10” styrofoam insulation 10

Fabrication Epoxy Fiberglass reinforcement Microballoons 11

Fabrication Lexan plate for camera window Velcro door mechanism 12

Assembly All mounts are removable Bolted into place Central rod holds all mounts in place Booms screw into mounting block

Hardware & Software

Flight Software / Hardware Dr. Isenberg’s data logging system utilizing a PIC processor 3.3V and 5V power regulators IMU board PCB – signal routing & conditioning Video recorder Data Analysis: MATLAB 15

Attitude Determination

23 solar panels as sun sensors IMU consisting of a 3-axis rate gyroscope and 3-axis accelerometer Two vector attitude determination using Wahba’s Problem o Acceleration Vector o Sunlight Vector 17

IMU Calibration Both rate gyroscope and accelerometer calibrated Cross-coupling effects considered between axes Verification of calibration 18

Light Measurement Vector Orientation of each panel with respect to x, y, and z axes of gondola (i.e., body frame) Transformation of data into light measurement vector with respect to the body frame 19

Flight Results

Acceleration Vector 21

Angular Velocity Vector 22

Light Measurement Vector 23

Attitude (Quaternion) 24

Results Comparison 25

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 Determine better attitude estimation algorithm Attitude control 26

Acknowledgements Jack Crabtree – ERAU & ANSR 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 Members University of Arizona 27

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