Zaxis Acceleration and forward Airspeed Measurement for Garvey

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Z-axis Acceleration and forward Airspeed Measurement for Garvey P-12 A Mission

Z-axis Acceleration and forward Airspeed Measurement for Garvey P-12 A Mission

Contents o o o Garvey Spacecraft P 12 A System Objectives Requirements Design Constraints

Contents o o o Garvey Spacecraft P 12 A System Objectives Requirements Design Constraints Design n n n o C&DH Pitot-Static System Accelerometer subsystem EPS Schematics Software Architecture Risks and Mitigation 10/26/2020 2

Garvey Spacecraft P 12 A o o Garvey Spacecraft Corp. Expected to reach 10,

Garvey Spacecraft P 12 A o o Garvey Spacecraft Corp. Expected to reach 10, 000 feet 36 seconds of flight Reusable first stage 10/26/2020 3/83

Payload Integration o o XX participating universities RF emitting payloads in fairing Payload cylinder

Payload Integration o o XX participating universities RF emitting payloads in fairing Payload cylinder Payload shelves Side View 10/26/2020 faring 4/8

Objectives o o o Study Z-axis acceleration of the Garvey P-12 A flight Study

Objectives o o o Study Z-axis acceleration of the Garvey P-12 A flight Study airspeed of P-12 A flight Compare IMU data with direct airspeed information Testing Software libraries and hardware for future Kentucky Space Missions Practice design, development and testing processes 10/26/2020 5/8

Requirements o Main Requirements n n o Measure airspeed up to 500 MPH Measure

Requirements o Main Requirements n n o Measure airspeed up to 500 MPH Measure Z axis G forces up to 9 Gs Measure z-axis accelerations with a big margin for anomalies. 100 Hz sample rate Minimum Success Criteria n 10/26/2020 Successful recovery of airspeed and acceleration at 30 Hz sample rate 6/8

Design Constraints o o o Cost < $500 Time: Two week design, development and

Design Constraints o o o Cost < $500 Time: Two week design, development and testing Mass: 400 g Volume: 500 cc Staffing: 4 student team 10/26/2020 7/8

Design Overview o o o Solid-state Accelerometer on the Z-axis peak 9 G Pitot-static

Design Overview o o o Solid-state Accelerometer on the Z-axis peak 9 G Pitot-static system to measure airspeed (with differential pressure sensor) EPS: 9 V battery and 5 V and 3. 3 V regulators Ram air pressure tube Static air pressure tube 9 V Battery 5 V regulator Pitot-static Tube Differential Pressure Sensor Analog Channel 0 Analog Channel 1 3. 3 V regulator 10/26/2020 Microcontroller (MSP 430) SPI Interface Z-axis accelerometer SD Card 8/8

C&DH o MSP 430 Data logging Circuit n n n Low power 16 -bit

C&DH o MSP 430 Data logging Circuit n n n Low power 16 -bit microcontroller 8 channel 12 -bit Analog to Digital converter 2 Digital Communication ports (UART, SPI, I 2 C) Differential Pressure Sensor Z-axis accelerometer 10/26/2020 Analog Channel 0 Microcontroller (MSP 430) Analog Channel 1 SPI Interface SD Card

Pitot-Static Airspeed o Calculating Airspeed n Pitot-static equation: Source: NASA Glenn Research Center http:

Pitot-Static Airspeed o Calculating Airspeed n Pitot-static equation: Source: NASA Glenn Research Center http: //www. grc. nasa. gov/WWW/K-12/airplane/pitot. html 10/26/2020 10/8

Pitot-Static Subsystem o Pitot-tube airspeed sensor n n o Aircraft Spruce & Specialty Co.

Pitot-Static Subsystem o Pitot-tube airspeed sensor n n o Aircraft Spruce & Specialty Co. Pitot-Static tube (part number: #15144) To be mounted on the side of the rocket Pressure sensor n n n 500 MPH at 10, 000 feet would require 02. 17 PSI 15 PSI differential temperature compensate pressure sensor, with 0 -5 Volt output range. Using 0 to 2. 5 V analog to digital converter: o o 10/26/2020 o 12 bits over 0 to 7. 5 PSI effective range Maximum expected pressure: 2. 2 PSI. Sampling resolution: 0. 0018 PSI ~ 0. 2 mph 11/8

Accelerometer Subsystem n n n 2 -axis +/- 18 g accelerometer (ADXL 321) Regulated

Accelerometer Subsystem n n n 2 -axis +/- 18 g accelerometer (ADXL 321) Regulated 3. 3 Volt supply Using 0 to 2. 5 V analog to digital converter: o -18 to 14. 9 g effective range o 57 m. V/g sensor output o 12 bit Analog to Digital Converter: Sampling resolution: 0. 0107 g 10/26/2020 12/8

EPS o o o 5 Volt (LM 340 T) Voltage regulator to supply Pressure

EPS o o o 5 Volt (LM 340 T) Voltage regulator to supply Pressure sensor. 3. 3 Volt (LM 2937 ET) Voltage regulator for Accelerometer, MPS 430, SD Card. Energizer 9 V battery. 10/26/2020 13/8

Schematics – C&DH 10/26/2020 14/8

Schematics – C&DH 10/26/2020 14/8

Schematics - Sensors 10/26/2020 15/8

Schematics - Sensors 10/26/2020 15/8

Schematics - EPS 10/26/2020 16/8

Schematics - EPS 10/26/2020 16/8

Software Architecture o SW structure block diagram, A 2 D sample plan and schedule,

Software Architecture o SW structure block diagram, A 2 D sample plan and schedule, SD card libraries. Include a block diagram figure o max bandwidth to the SD. . 10/26/2020 17/8

Materials and Supplies Description Part number Price Quantity Supplier MSP 430 boards DEV-00047 $34

Materials and Supplies Description Part number Price Quantity Supplier MSP 430 boards DEV-00047 $34 1 Sparkfun SD card breakout boards BOB-00204 $18 1 Sparkfun 18 G accelerometer SEN-00848 $30 1 Sparkfun 7 Mhx oscillators X 188 -ND $4. 20 1 Digikey 5 V Regulators LM 340 T-5. 0 -ND $1. 74 1 Digikey 3. 3 V Regulators LM 2937 ET-3. 3 -ND $2. 05 1 Digikey Pressure Sensor 480 -1920 -ND $24 1 Digikey PC board V 2011 -ND $20 1 Digikey Pitot-tube #15144 $17. 75 1 Aircraft Spruce & Specialty Co. SD card sdsdb-2048 $6. 40 1 Amazon TOTAL 10/26/2020 $158. 14 18/8

Risks o o o Logistics of mounting Pitot-static tube on airframe. Tubing Surviving launch

Risks o o o Logistics of mounting Pitot-static tube on airframe. Tubing Surviving launch accelerations and vibrations Short turn-around and limited testing time. Recovery of SD card for data analysis RBF and triggering logging 19

Aircraft Instruments Pitot Static System Airspeed Indicator AirspeedAircraft Instruments Pitot Static System Airspeed Indicator Airspeed
ACCELERATION AND FREE FALL CHAPTER 3 ACCELERATION ACCELERATIONACCELERATION AND FREE FALL CHAPTER 3 ACCELERATION ACCELERATION
Kinematics Acceleration Objectives Define acceleration and depict accelerationKinematics Acceleration Objectives Define acceleration and depict acceleration
Acceleration Speed and Velocity Acceleration Acceleration is ChangingAcceleration Speed and Velocity Acceleration Acceleration is Changing
Acceleration and Acceleration from Gravity ACCELERATION 1 2Acceleration and Acceleration from Gravity ACCELERATION 1 2
Acceleration Section 2 Acceleration and Motion Acceleration isAcceleration Section 2 Acceleration and Motion Acceleration is
Acceleration Defining Acceleration Acceleration the rate at whichAcceleration Defining Acceleration Acceleration the rate at which
IPC NOTES Acceleration ACCELERATION acceleration the rate ofIPC NOTES Acceleration ACCELERATION acceleration the rate of
Acceleration Circular Motion Centripetal Acceleration Tangential Acceleration CentripetalAcceleration Circular Motion Centripetal Acceleration Tangential Acceleration Centripetal
Acceleration Changing Velocity Acceleration Acceleration The rate atAcceleration Changing Velocity Acceleration Acceleration The rate at
ACCELERATION ACCELERATION Acceleration is the at which theACCELERATION ACCELERATION Acceleration is the at which the
Linear Kinematics Acceleration Contents Definition of acceleration AccelerationLinear Kinematics Acceleration Contents Definition of acceleration Acceleration
Linear Kinematics Acceleration Contents Definition of acceleration AccelerationLinear Kinematics Acceleration Contents Definition of acceleration Acceleration
Linear Kinematics Acceleration Contents Definition of acceleration AccelerationLinear Kinematics Acceleration Contents Definition of acceleration Acceleration
MOTION UNDER CONSTANT ACCELERATION Constant Acceleration Constant accelerationMOTION UNDER CONSTANT ACCELERATION Constant Acceleration Constant acceleration
Acceleration Acceleration Acceleration is the measure of howAcceleration Acceleration Acceleration is the measure of how
Acceleration Acceleration Acceleration is a CHANGE in motionAcceleration Acceleration Acceleration is a CHANGE in motion
Linear Kinematics Acceleration Contents Definition of acceleration AccelerationLinear Kinematics Acceleration Contents Definition of acceleration Acceleration