University of Hawaii: Community Colleges Team Team Overview 3 - PowerPoint PPT Presentation

University of Hawai’i: Community Colleges Team

Team Overview 3 Changes Since PDR 4 Vehicle Design 5 Payload Design 32 Safety 46 Testing 49 Project Plan 58

High Power Rocketry Certifications Dr. Jacob Hudson Jr. (Team Mentor) - Level 3 Katherine Bronston (Team Lead) - Level 2 Matthew Nakamura (Vehicle Engineer) - Level 2 Lauren Grzegorczyk (Vehicle Engineer) - Level 1

Tracker ● ○ GPS Microcontroller ○ ● Retention and Ejection Design Changes URLSS ○ ● Deployment Trigger Current ○ ○ Shields ● Rover Design Changes Sensor ○ ○ Motor Microcontroller ○ ● SSRS Umbrella Design ○

Length 116 inches Weight/Mass 32.2 lbs/1 slug Motor Selection Aerotech K1050W Number of Sections 2 Target Altitude 4700 feet AGL Main Chute Deployment 500 feet AGL

Main Chute 12’ Rocketman Payload Chute - 5’ Rocketman Drogue Chute - 3’ Rocketman

Determination of Center of Gravity Determination of Center of Pressure

CP 96.3’’ below the nosecone CG 68.4’’ below the nosecone CG and CP are 27.9’’ apart

Descent Time: 96 s

Wind Velocity Wind Velocity D optimistic (ft) D pessimistic (ft) (ft/sec) (mph) 0 0 0 0 7.33 5 561.2 701.8 14.6 10 1117.8 1397.2 22 15 1684.3 2105.4 29.3 20 2343.2 2804

Wind Speed (ft/sec) Simulated Drift (ft) 3.00-7.33 214 7.34-14.66 1010 14.67-22.00 1263 22.01-29.33 2323

q C D Est. Altitude +/- 0 o 0.89 4109.3’ 20.3’ 5 o 0.89 4110.0’ 20.2’ 10 o 0.92 4067.8’ 20.1’ 15 o 0.97 3997.8’ 20.0’ 20 o 1.07 3865.7’ 19.7’ 25 o 1.12 3804.2’ 19.5’ 30 o 1.18 3735.7’ 19.3’

● Scaling Factor 1:4 ● Jolly Logic Altimeter 3 ● Motor: B6-4

Flight Conditions Altitude above 90 m sea-level: Recorded Altitude Relative humidity: 50% 45° 90° Failure Mode VDA Deployment Temperature: 80 F 0° 11° Angle (0°/90°) Latitude: 21 Apogee Height (ft) 182 205 179 142 145 Wind: 8-14 mph Variability: Some (0.04) Weather: Partly Cloudy

Linear Actuator: PQ12-R

Soil Collector: Umbrella Design Soil Collector Closed Soil Collector Open

TABLE 5.4 SUMMARY OF HAZARDS PRE-MITIGATION Severity Probability 1 2 3 4 Catastrophic Critical Marginal Negligible A - Frequent B - Probable 1 1 C - Occasional 8 4 4 1 D - Remote 14 11 4 E - Improbable

TABLE 5.5 SUMMARY OF HAZARDS POST-MITIGATION Severity Probability 1 2 3 4 Catastrophic Critical Marginal Negligible A - Frequent B - Probable C - Occasional D - Remote 1 E - Improbable 18 14 9 6

Name Description Requirement Status Verified VEHICLE 1 - Test. The subscale model will be flown with 2.19 Compete Subscale Testing different angles of the VDA to test the predicted correlation between the deployment angle and maximum altitude. VEHICLE 2 - Demonstration. To demonstrate Recovery 1 Complete Inverted-Y Harness functionality of the inverted-Y harness, the Testing subscale’s forward/payload section will be closely monitored during flight to ensure horizontal orientation during descent and landing. VEHICLE 3 - Drop Demonstration. To ensure the strength of Safety Concerns Scheduled for Tests the shear pins, the rocket will be drop January 24, 2019 tested to ensure the nosecone does not prematurely separate.

Name Description Requirement Status Verified VEHICLE 4 - Demonstration. To Demonstrate 3.1 Scheduled for Parachute functionality of the parachute deployment, 3.2 February 9, 2019 Deployment Tests the team will prepare the proper pyrotechnic charge and demonstrate that the sections separate and chute deploy while on the ground. VEHICLE 5 - Demonstration. The Avionics and 2.11 Complete Avionics and Electronics will be turned on and ran on the 3.11.2 Electronics ground to ensure the devices’ functionality. Recovery 3 Performance Tests VEHICLE 6 - Motor Demonstration. Motor retainer will Safety Concerns Scheduled for Retainer Stress Test experience intense stress levels to ensure it January 26, 2019 is durable enough to withstand the launch day conditions.

Name Description Requirement Status Verified RETENTION-1: Demonstration. Show that the motor is 4.3.2 Complete Motor Test able to be turned on when the signal to deploy is received by the XBee receiver. RETENTION-2: URL Demonstration. Test full URL system and 4.3.2 In Progress Test ensure it will be able to deploy the rover. RETENTION-3: Demonstration. Fit test of URL with URLSS. 4.3.2 In Progress URLSS Fit Test RETENTION-4: Drop Demonstration. Drop Retention and 4.3.2 In Progres Test Ejection Subsystem from a height of 19.7 cm.

Name Description Requirement Status Verified DEPLOYMENT-1: Test. Determine optimal amount of 4.3.3 Complete. Current Test current for XBee Pro. DEPLOYMENT-2: Demonstration. Ensure that the XBee 4.3.3 In progress Obstruction Test Pro is able to receive the deployment signal from within the payload tube. DEPLOYMENT-3: Demonstration. Utilizing all intended 4.3.3 In progress System components for final design of Demonstration nosecone, demonstrate that system works.

Name Description Requirement Status Verified ROVER-1: Coding Demonstration. Arduino code governing basic 4.3.1, 4.3.4 Complete Movement movement was tested on a pre-built rover. The code demonstrates the rover can move forward, turn left and turn right. ROVER-2: Coding Test. Arduino code for ultrasonic sensors was 4.3.1, 4.3.4 In progress Detection tested. The code demonstrates the sensors can detect various types of obstacles from various distance ROVER-3: Distance Test. The rover will record the distance it 4.3.1, 4.3.4 In progress Determination traveled and angle it turned while it traverses a clear flat surface.

Name Description Requirement Status Verified ROVER-4: Terrain Demonstration. The rover will demonstrate it 4.3.1, 4.3.4 In progress Traversal can drive over various types of soil and terrain. It will record the distance it traveled during movement. ROVER-5: Obstacle Test. The rover will use its forward ultrasonic 4.3.1, 4.3.4 In progress Avoidance sensor to detect obstacles in the way. It will turn to avoid the object. ROVER-6: Outside Demonstration. The rover will use its 4.3.1, 4.3.4 In progress Obstacle Avoidance sensors to navigate through obstacles. It will record the distance it travelled during the experiment. ROVER-7: Subsystem Demonstration. The rover will use its 4.3.1, 4.3.4 In progress Demonstration sensors to navigate at least 10 feet away from its starting position over an obstacle course.

Name Description Requirement Status Verified SOIL-1: Linear Test. Run arduino code and verify it’s 4.3.5 Complete Actuator Motion able to actuate to position specified. SOIL-2: Umbrella Demonstration. Verify collector 4.3.5, 4.3.6 In progress Collector expands and contracts as intended. SOIL-3: SSRS and Demonstration. Demonstrate linear 4.3.5, 4.3.6 In progress Sample Size actuator and umbrella collector work in Verification unison to collect 10 mL of sample.

Name Description Status PF-1: Rover and Retention Demonstration. Ensure rover is able to be mounted In progress and Ejection Fit Test securely to URL. This demonstration is scheduled for February 1, 2019. PF-2: Tracker and Demonstration. Ensure tracker is able to fit through In progress Bulkhead Fit Test hole for motor in bulkhead. This demonstration is scheduled for February 8, 2019. PF-3: Motor and Bulkhead Demonstration. Ensure motor fits within bulkhead In progress Fit Test hole. This demonstration is scheduled for February 8, 2019. PF-4: URLSS and Payload Demonstration. Ensure URLSS fits within Payload In progress Tube Fit Test Tube securely. This demonstration is scheduled for February 15, 2019. VPDF: Vehicle and Payload Demonstration. Ensure that the Launch Vehicle and Scheduled for February Demonstration Flight Payload perform as designed. 17, 2019

Vehicle Vendors Payload Vendors Hawk Mountain Enterprises ● ● ServoCity ● Altus Metrum Adafruit ● PerfectFlite ● ● SparkFun ● Rocketman Parachutes Actuonix ● Aerotech ● ● Arduino ● Max Q Aerospace Advanced Circuits ● Paracord Planet ● ● City Mill

General Requirements ● Team organized into four teams Roles assigned to specific students ● Identified proper rail size: 12 foot 1515 rail ● ● Team Mentor: Dr. Jacob Hudson