Project Number: MQP SMJ 1A06 Avionics Electronics Suite A Major Qualifying Project Report: submitted to the Faculty of the WORCESTER POLYTECHNIC INSTITUTE in partial fulfillment of the requirements for the Degree of Bachelor of Science by Ryan D. Meador Date: April 26, 2007 Approved: Professor Susan M. Jarvis This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its web site without editorial or peer review. 1 Abstract This MQP consists of designing and building the avionics systems for the WARRIORS II rocket. The avionics are comprised of a flight data recorder (FDR), flight computer, telemetry, power supply, and support modules. The FDR possesses a sensor suite including an altimeter and accelerometer, and logs the data over the entire flight. The flight computer is a backup for a commercial system and is capable of orchestrating all rocket functions. Telemetry relays real-time FDR data to the ground. 2 Table of Contents Abstract......................................................................................................................................................2 Introduction................................................................................................................................................5 WARRIORS I Overview.......................................................................................................................5 WARRIORS II Overview......................................................................................................................6 Requirements.............................................................................................................................................7 Design........................................................................................................................................................9 Flight Data Recorder.............................................................................................................................9 Sensors............................................................................................................................................10 Memory and Data Bus....................................................................................................................10 Flight Computer..................................................................................................................................11 Software..........................................................................................................................................11 Telemetry.............................................................................................................................................12 Power Supply......................................................................................................................................12 Servo Controller..................................................................................................................................14 Staging Controller...............................................................................................................................14 Igniter Controller.................................................................................................................................15 Nichrome Controller...........................................................................................................................15 Design and Programming Environment...................................................................................................15 Schematic and PCB Layout.................................................................................................................15 C Programming...................................................................................................................................16 Parts Ordering..........................................................................................................................................17 Assembly, Testing, and Debugging.........................................................................................................18 Igniter Controller.................................................................................................................................19 Staging Controller...............................................................................................................................20 Servo Controller..................................................................................................................................21 Flight Computer..................................................................................................................................22 Flight Data Recorder...........................................................................................................................22 Telemetry.............................................................................................................................................23 Nichrome Controller...........................................................................................................................23 Conclusion...............................................................................................................................................25 Acknowledgments...............................................................................................................................25 Appendix A: Project Proposal..................................................................................................................27 Abstract...............................................................................................................................................27 WARRIORS I Overview.....................................................................................................................28 WARRIORS II Overview....................................................................................................................29 Avionics Requirements.......................................................................................................................30 3 Proposed Design..................................................................................................................................32 High-Level Block Diagram............................................................................................................32 Flight Data Recorder......................................................................................................................33 Flight Computer..............................................................................................................................34 Telemetry........................................................................................................................................34 Power Supply..................................................................................................................................35 Testing.................................................................................................................................................35 Unit Tests........................................................................................................................................35 Flight-worthiness Tests...................................................................................................................37 Budget.................................................................................................................................................39 Appendix B: Support Module Pinouts.....................................................................................................40 Igniter Controller.................................................................................................................................40 Servo Controller..................................................................................................................................40 Staging Controller...............................................................................................................................41 Appendix C: Schematics..........................................................................................................................43 Flight Data Recorder...........................................................................................................................43 Flight Computer..................................................................................................................................44 Igniter Controller.................................................................................................................................45 Servo Controller..................................................................................................................................46 Staging Controller...............................................................................................................................47 Telemetry.............................................................................................................................................48 Bibliography.............................................................................................................................................49