Piedmont Student Launch Team Critical Design Review 19 January 2017 - - PowerPoint PPT Presentation

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Piedmont Student Launch Team Critical Design Review 19 January 2017 - - PowerPoint PPT Presentation

Sep 18, 2023 257 likes •686 views

Piedmont Student Launch Team Critical Design Review 19 January 2017 Piedmont Student Launch Team Piedmont Virginia Community College Overview Design overview Payload design Launch vehicle design Payload integration Launch

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Piedmont Student Launch Team Piedmont Virginia Community College

Piedmont Student Launch Team

Critical Design Review 19 January 2017

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Piedmont Student Launch Team Piedmont Virginia Community College

Overview

  • Design overview
  • Launch vehicle design
  • Launch and flight statistics
  • Recovery system and landing

statistics

  • Test plans and procedures
  • Subscale flight results
  • Payload design
  • Payload integration
  • Interfaces
  • Status of requirements

verification

  • Q&A

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Piedmont Student Launch Team Piedmont Virginia Community College

DESIGN OVERVIEW

Rodney Davis

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Piedmont Student Launch Team Piedmont Virginia Community College

Design Overview - Final Launch Vehicle Statistics

  • Diameter: 5.5 in
  • Fin span: 20.3 in
  • Height: 108.8 in
  • Center of gravity before Burnout: 66.7 in from nose cone
  • Center of gravity after Burnout: 63.6 in from nose cone
  • Center of Pressure: 78.6 in from nose cone
  • Static stability margin: 2.26

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Piedmont Student Launch Team Piedmont Virginia Community College

Design Overview – Mass and Mass Margin

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System Mass (lbs) Mass Margin (lbs)

Overall 29.77 +1.375, -1.5 Upper section 4.53 ±0.39 Avionics bay 4.57 ±0.03 Lower section 7.53 ±0.95 Ballast 2.00 ±0 Nose cone 2.59 ±0 Motor mount 1.77 ±0.48 Bulkheads (each) 0.39 ±0.2 Upper body tube 3.85 ±0 Lower body tube 3.15 ±0 Motor tube 1.03 ±0.02

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Piedmont Student Launch Team Piedmont Virginia Community College

Design Overview – Mass and Mass Margin (con’t)

System Mass (lbs) Mass Margin (lbs)

Recovery harness (each, with swivels and quick links) 1.22 ±0.04 Parachutes (both) 1.60 ±0.3 Avionics bay tube 1.86 ±0 Avionics sled, mounting hardware, and altimeter 0.64 ±0 Fins (each) 0.70 ±0.07 Tail cone 0.44 ±0.1 Centering rings (each) 0.14 ±0.15 Motor 8.10 ±0 6

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Piedmont Student Launch Team Piedmont Virginia Community College

Design Overview - Final Payload Statistics

  • Overall

– Mass: 3.5 lbs – Length: 12 in

  • Reaction wheel

– Mass: 1.5 lbs – Length: 1.5 in – Diameter: 4.5 in

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Piedmont Student Launch Team Piedmont Virginia Community College

LAUNCH VEHICLE DESIGN

Rodney Davis

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Piedmont Student Launch Team Piedmont Virginia Community College

Launch Vehicle Design - Key Design Features

  • Altitude control: ballasting
  • Main material: fiberglass
  • Number of shear pins per

section: 4

  • Length of recovery harness

sections: 27 ft

  • Rail button size: 1515
  • Main parachute size: 84 in
  • Drogue parachute size: 18 in
  • Ejection charge size: 1.6 g

drogue, 2.8 g main

  • Recovery harness attachment:

quick links and swivels

  • Attachment points per

section: 2

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Piedmont Student Launch Team Piedmont Virginia Community College

Launch Vehicle Design - Upper Section

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Piedmont Student Launch Team Piedmont Virginia Community College

Launch Vehicle Design - Avionics Bay

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Piedmont Student Launch Team Piedmont Virginia Community College

Launch Vehicle Design - Lower Section

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Piedmont Student Launch Team Piedmont Virginia Community College

Launch Vehicle Design - Full Rocket

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Piedmont Student Launch Team Piedmont Virginia Community College

Launch Vehicle Design - Final Motor Choice

  • Aerotech L1150R-P

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Piedmont Student Launch Team Piedmont Virginia Community College

STATISTICS

Daniel Hull

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Piedmont Student Launch Team Piedmont Virginia Community College

Launch Statistics

  • Thrust-to-Weight at rail exit: 7.6:1
  • Rail Exit Velocity: 71 ft/s
  • Rail Exit Time: 0.385 s

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Piedmont Student Launch Team Piedmont Virginia Community College

Flight Statistics

  • Stability Margin at Launch: 2.26
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Piedmont Student Launch Team Piedmont Virginia Community College

Recovery System

  • Parachutes

– Main: 84 in – Drogue: 18 in

  • Recovery Harnesses

– Type: Tubular Kevlar – Length: 27 ft – Size: 1/2 in

  • Descent Rates

– Under Drogue: 112 ft/s – Under Main: 18.8 ft/s

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Piedmont Student Launch Team Piedmont Virginia Community College

Kinetic Energy

Main Deployment Section Kinetic Energy (ft-lbf) Upper 875 Avionics Bay 883 Lower 1455 Landing Section Kinetic Energy (ft-lbf) Upper 24.9 Avionics Bay 25.1 Lower 41.4

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Piedmont Student Launch Team Piedmont Virginia Community College

Drift Predictions

Wind Speed (MPH) Drift (ft) 5 515 10 1030 15 1545 20 2060 Wind Speed (MPH) Drift (ft) 5 171 10 352 15 526 20 708

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Piedmont Student Launch Team Piedmont Virginia Community College

TEST PLANS AND PROCEDURES

Andrew Oxford

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Piedmont Student Launch Team Piedmont Virginia Community College

Test Plans and Procedures

  • Structure Testing

– Push / Pull tests

  • Experiment Testing

– Push / Pull tests – Electronics Tests

  • Mounting
  • Recovery System Ground Fire
  • Simulations
  • Software Testing

– Done

  • Data collection
  • Data transmission

– To Do

  • Range
  • Target identification
  • Reaction wheel control

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Piedmont Student Launch Team Piedmont Virginia Community College

Test Plans and Procedures – Recovery System

  • Electronics

– Altimeter tests – Mounting

  • Recovery Harness

– Pull tests

  • Parachutes

– Deployment

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Piedmont Student Launch Team Piedmont Virginia Community College

SUBSCALE TEST FLIGHT

Nicolas Gutkowski

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Piedmont Student Launch Team Piedmont Virginia Community College

Subscale Test Flight

  • 73% Scale airframe
  • Dual deploy
  • Redundant altimeters
  • Full payload electronics
  • 29% Scale mass reaction

wheel

  • J250 Motor
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Piedmont Student Launch Team Piedmont Virginia Community College

Subscale Test Flight - Failure

  • Motor failure at T+0.767s
  • Motor failure caused motor to be ejected from rocket
  • Altimeters did not reach arming altitude

– Parachute did not deploy

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Piedmont Student Launch Team Piedmont Virginia Community College

Subscale Test Flight – Recovered Data

  • Rail Exit Velocity: 46 ft/s
  • Angle at Rail Exit: <5°
  • Anomaly Altitude: 42 ft
  • Apogee: 154 ft
  • Flight Length: 9.5 s
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Piedmont Student Launch Team Piedmont Virginia Community College

PAYLOAD DESIGN

Sander Abraham

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Piedmont Student Launch Team Piedmont Virginia Community College

Payload Design - Final Payload Overview

  • Similar Design as PDR

– Subscale had minor changes to accommodate the size – The motor was moved to the bottom

  • Different sensor

package

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Piedmont Student Launch Team Piedmont Virginia Community College

Payload Design – Reaction Wheels

  • Subscale Reaction Wheel:

– Made up of two wooden disks with bolts going through, and four nuts per bolt to add mass – Mass: 0.44 lbs

  • Full Scale Reaction Wheel:

– Same design with fiberglass – Mass: 1.5 lbs

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Piedmont Student Launch Team Piedmont Virginia Community College

Payload Design - Experiment Electronics

  • Each part is set on top of standoff

screws

  • Parts List:

– Raspberry Pi 3 B+ – Xbee Pro 900 HP – Adafruit Ultimate GPS – AltIMU-10

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Piedmont Student Launch Team Piedmont Virginia Community College

Payload Design - Experiment Electronics (cont.)

  • Parts List:

– Battery Pack (6xAA) – 5v Step Down Converter (UBEC) – 2x A23 Batteries – MD10C R3 Motor Controller

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Piedmont Student Launch Team Piedmont Virginia Community College

Payload Integration

  • The base of the payload sits 41.85 in from the nose cone
  • A coupler section acts as a rest for the payload to sit on
  • The payload is kept in place by rivets
  • The camera has a back plate that is attached to the inside of

the upper body section

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Piedmont Student Launch Team Piedmont Virginia Community College

INTERFACES

Sander Abraham

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Piedmont Student Launch Team Piedmont Virginia Community College

Interfaces - Internal

  • Avionics bay

– Upper and lower sections

  • Experiment
  • Motor mount

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Piedmont Student Launch Team Piedmont Virginia Community College

Interfaces - External

  • Launch rail

– 1515 – 12 ft – Distance between rail buttons: 27.6 in

  • Experiment camera
  • Tracking system and

transmitter

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Piedmont Student Launch Team Piedmont Virginia Community College

STATUS OF REQUIREMENTS VERIFICATION

Andrew Oxford

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Piedmont Student Launch Team Piedmont Virginia Community College

Status of Requirements Verification – Overall

  • Project is currently on schedule

In Progress Completed Not Started

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Piedmont Student Launch Team Piedmont Virginia Community College

Status of Requirements Verification – Verified

  • Design

– Meets all requirements

  • Subscale flight

– December 10th

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Piedmont Student Launch Team Piedmont Virginia Community College

Status of Requirements Verification – On Going

  • Educational engagement

– 90 Female – 17 Male – 69 Direct engagement – More activities planned

  • Safety

– Continuing to update safety plans – Have checklists

  • Website

– Continuing to be updated – Hosting all deliverables

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Piedmont Student Launch Team Piedmont Virginia Community College

Status of Requirements Verification – In Progress

  • Subscale re-flight

– January 21st

  • Full scale test flight

– Construction is underway – Launch planned for February 4th

  • FRR
  • Launch week

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Piedmont Student Launch Team Piedmont Virginia Community College

Questions?