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Line 288: − − == Budget == − − <span>lccc</span><br /> − Teensy 3.2 & 1 & $19.95 & $19.95<br /> − Adafruit 9DOF IMU & 1 & $19.95 & $19.95<br /> − Analog Feedback Micro Servos, plastic gears & 2 & $9.95 & $19.90<br /> − & & & $9.12<br /> − BNO055 Absolute Orientation Sensor & 1 & $34.95 & $34.95<br /> − & & & $4.34<br /> − Eggfinder GPS & 1 & $95.00 & $95.00<br /> − Adept Rocketry Transmitter & 1 & $116.00 & $116.00<br /> − Big Red Bee GPS & 1 & $259.00 & $259.00<br /> − Stratologger CF & 2 & $49.46 & $98.92<br /> − SSI Teensy CAN breakout & 1 & &<br /> − SSI Altimeter & 2 & &<br /> − <br /> − <br /> − Iris Ultra 60“ Parachute & 2 & $180.00 & $360.00<br /> − Archetype Cable Cutter & 1 & $50.00 & $50.00<br /> − Parachute protector & 2 & $11.00 & $22.00<br /> − Nylon shock cord & 10 & $0.30 & $3.00<br /> − Kevlar cord protetctor & 1 & $16.00 & $16.00<br /> − Charge wells & 20 & $0.50 & $10.00<br /> − Ematches & 20 & $0.75 & $15.00<br /> − <br /> − <br /> − PML 3.9” Intelli-Cone Nosecone & 1 & $30.99 & $30.99<br /> − 42“ Aft Airframe & 1 & $94.00 & $94.00<br /> − 30” Forward Airframe & 1 & $72.00 & $72.00<br /> − 8“ Coupler/AvBay & 4 & $20.00 & $80.00<br /> − Fiberglass (Payload Fins) & 1 & $35.00 & $35.00<br /> − Fiberglass (Big Fins) & 4 & $17.79 & $71.16<br /> − Bulkheads & 4 & &<br /> − Polycarbonate Sheet (Payload Fins) Prototype & 1 & $32.00 & $32.00<br /> − 48” Prototyping LOC Airframe & 1 & $27.00 & $27.00<br /> − <br /> − <br /> − Cesaroni Tech (CTI) M1230Motor & 1 & $278.96 & $278.96<br /> − CTI 75mm 4 Grain Motor Hardware Set & 1 & $278.96 & $278.96<br /> − Aerotech J425 (L2 Motor) & 1 & $63.00 & $63.00<br /> − Motor Adapter & 1 & $21.95 & $21.95<br /> − <br /> − <br /> − Quicklinks & & & $10.00<br /> − Rail guides & & & $15.00<br /> − <br /> − <br /> − Line 342:
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no edit summary
{{rocket-project
{{rocket-project
| header = Prometheus (ARES-4)
| header = Prometheus (ARES-4)
=== Motor Performance ===
=== Motor Performance ===
[[File:ThrustCurve M1230.png | right |650px]]
[[File:CTI_L395.png | right |550px]]
{| class="wikitable"
{| class="wikitable"
{|
{| class="wikitable"
| Apogee
| 10790 ft
| 11,889 ft
|-
|-
| Max Velocity
| 1154 ft/s (Mach 1.04)
| 825 ft/s
|-
|-
| Max Acceleration
| 374 ft/<math>\exp{s}{2}</math>
| 131ft/s<sup>2</sup>
|-
|-
| Ground Hit Velocity
| 12.6 ft/s
| 12.6 ft/s
|-
|-
| Time To Apogee
| 23.7 s
| 23.7 s
|}
|}
=== Fins ===
=== Fins ===
We currently estimate the fins to be 4“ x 4” squares constructed out of fiberglass. As we develop a more realistic model for our system for our control law, we will be able to more accurately determine how large of an area our fins will need to cover to exert the necessary torque to resist rotation.
We currently estimate the fins to be 4” x 4” x 3/32” squares constructed out of fiberglass. As we develop a more realistic model for our system for our control law after we receive orientation data from a test flight, we will be able to more accurately determine how large of an area our fins will need to cover to exert the necessary torque to resist rotation. The fins will be connected on a worm gear mechanism, in order to prevent movement on accent, consequently protecting the fins from any kind of unintentional actuation.
For our stability fins on our aft airframe, we will be using off-the-shelf fins from Giant Leap Rocketry with the root chord of 8.5“, tip chord of 4”, and height of 8.5".
For our stability fins on our aft airframe, we will be using off-the-shelf fins with the root chord of 8.5”, tip chord of 4”, and height of 8.5”, and a Coefficient of drag of 0.14.
=== Airframes ===
=== Airframes ===
== Avionics ==
== Avionics ==
The payload and the booster sections will each contain two altimeters for redundancy (four altimeters total). Each altimeter will be wired up to the ejection charges mounted on the respective avionics bays as well as to a cable cutter for our reefing system. Since both the payload and booster section will be reefed, there will be redundant cable cutters for both parachutes as well (four cable cutters total). The reefing system will be discussed in detail in '''2.7 Recovery'''.
The payload and the booster sections will each contain two altimeters for redundancy (four altimeters total). Each altimeter will be wired up to the ejection charges mounted on the respective avionics bays as well as to a cable cutter for our reefing system. Since both the payload and booster section will be reefed, there will be redundant cable cutters for both parachutes as well (four cable cutters total). The reefing system will be discussed in detail in [[#Recovery|Recovery]].
=== APRS Transmission ===
=== APRS Transmission ===
== Avionics ==
== Avionics ==
The main controller for our payload will be a Teensy 3.2 from PJRC. This micro controller not only is compatible with Arduino code and the Arduino IDE, but contains a host of additional features including an ARM processor, 2 I<math>^{2}</math>C channels, and capabilities to connect to a CAN bus.
The main controller for our payload will be a Teensy 3.2 from PJRC. This micro controller not only is compatible with Arduino code and the Arduino IDE, but contains a host of additional features including an ARM processor, 2 I<sup>2</sup>C channels, and capabilities to connect to a CAN bus.
=== Sensor Fusion ===
=== Sensor Fusion ===
See https://www.overleaf.com/3972499sxgwkz. Kalman filtering and sensor fusion (see figure [fig:fusion]) will be used to get accurate and fault-tolerant values for orientation, position and velocity.
See [https://www.overleaf.com/3972499sxgwkz this document for our research].
Kalman filtering and sensor fusion will be used to get accurate and fault-tolerant values for orientation, position and velocity.
<!--
[fig:fusion]
[fig:fusion]
(orientation) at (0.5,-2.5) <span>'''Orientation'''</span>; (velocity) at (2.5,-1.25) <span>'''Velocity'''</span>; (angvel) at (0,-1.25) <span>'''Angular velocity'''</span>; (position) at (3.5,-2.5) <span>'''Position'''</span>;
(orientation) at (0.5,-2.5) <span>'''Orientation'''</span>; (velocity) at (2.5,-1.25) <span>'''Velocity'''</span>; (angvel) at (0,-1.25) <span>'''Angular velocity'''</span>; (position) at (3.5,-2.5) <span>'''Position'''</span>;
(tmp) at (1.5,-1); (mag)–(tmp); (acc)–(tmp); (tmp)–(orientation); (gyro)–(angvel); (angvel)–(orientation); (acc)–(velocity); (gps)–(velocity); (velocity)–(position); (gps)–(position); (baro)–(position);
(tmp) at (1.5,-1); (mag)–(tmp); (acc)–(tmp); (tmp)–(orientation); (gyro)–(angvel); (angvel)–(orientation); (acc)–(velocity); (gps)–(velocity); (velocity)–(position); (gps)–(position); (baro)–(position); -->
= Manufacturing & Assembly =
= Manufacturing & Assembly =
| April 2, 2016
| April 2, 2016
|}
|}
= Conclusion =
= Conclusion =
[[Category: Daedalus]]
[[Category:Rockets]]
[[Category: Rockets]]
[[Category: Documentation]]