Cansat Competition 2010:

Team: CATSAT TEAM (Students)

Country: Spain

University: Universidad Politécnica de Madrid Escuela Técnica Superior Ingenieros Aeronáuticos

Category: Experimental-Cansat

Size: Cansat Size

Team leader: Miguel Ángel de Frutos Carro

Team members:

Almudena Buelta Management and Administration

Alejandro Bujarrabal Data Analysis and Structure Carlos Freire Structure and TreasuryJuan Fernández Parachute systemMiguel Ángel de Frutos Electronics and Programming

Cansat Mission:•Detection, measurement and registration of different physics variables.

•Verification of the existence of useful microgravity.

•Design a modular electronic device which can be used in futures amateur rockets

• Practical realization of a recovery system which allow us a controlled opening.

Flight Data: Outside temperature.

Barometer.

Barometer altimetry.

Acceleration in 3 axis.

Speed on 3 axiss.

Space travelled in 3 axis.

Microgravity.

GPS coordinates.

GPS height.

GPS speed.

GPS heading.

Event detection: take off

rocket exit

Electronic and Programming :

Electronic and Programming :Accelerometer

Microcontroller BS2

TemperatureSensor

G-Switch

Pressure Sensor

EEPROM

256k

Voltage Regulator

GPS Module

Acelerometer

Electronic and Programming :

Microcontroller: BS2•Processor Speed: 20 MHz Turbo.•Program Execution Speed: ~ 12.000 RAM Size: 38 Bytes (12 I / 0, 26 Variable).•Scratch Pad RAM: 128 bytes.•EEPROM (Program) Size: 8 x 2 KBytes, ~ 4,000 PBASIC instructions.•Number of I / O Pins: 16 + 2 Dedicated Serial.•Current Draw @ 5 VDC: 40 mA Run, 350 uA Sleep.•Source / Sink Current per I / O: 30 mA / 30 mA.•PBASIC Commands: 61.•Package: 24-pin DIP.

Temperature Sensor: Dallas DS1620The DS1620 is an integrated circuit that works as a digital thermometer and uses a SPI communication to communicate with the microcontroller. Pressure Sensor:

Motorola MPX 4115th This sensor is an integrated circuit capable of measuring absolute pressure through a membrane system.It produce an output voltage proportional to 0.204 to 4.794V.

EEPROM: Microchip 25LC256 SPI (256K) EEPROM stands for Electrically-Erasable Programmable Read-Only Memory (electrically erasable and programmable ROM). It has a capacity of 32768 bits organized in 8-bit addresses.3-axis accelerometer Hitachi H48c The 3-axis accelerometer Hitachi H48c is an integrated device type MEMS capable of measuring gravitational forces (g) on 3 axes, ranging from 0 to ± 3g GPS: Parallax receiver Module The Parallax Global Positioning System (GPS) Receiver Module is a fully integrated, low-cost unit completed with an on-board patch antenna.

A G-Switch is a switch whose state depends on the acceleration forces. 

And the Energy….

Flight Data Analysis:

ALTURA

650655660665670675680685690695700705710715720725730735740745750

16:07:41 16:09:07 16:10:34 16:12:00 16:13:26 16:14:53 16:16:19 16:17:46 16:19:12 16:20:38

Cansat Device

EXCEL SpreedSheet

• GPS Track on Google Earth

• Data table

•Graphics and Diagrams

EXCELDIRECTLY

GoogleEarth

Structure subsystemObjetives:

Protect the electronics and support the parachute

Desing an fiberglass structure.

Minimizate the aerodinamical drag

Structure subsystem

Desing: Fiberglass

Two parts

Sizes: long = 11.5 cm

radio = 3.3 cm

Structure subsystemConstruction process:

Plaster mold

Structure subsystem

Fiberglass and Epoxi resin

Structure subsystem

Sand and paint

Recovery subsystemObjectives:

To desing a

parachute acording

to the weight of the

cansat.

To esing an

aperture sytem.

Recover the cansat

safely.

Recovery subsystem

Our parachute desing:

Made of Nylon.

Spherical shape.

Size: R = 0,375 m

Braided Nylon

threads, 1 meters

long

Recovery subsystem

• Parachute construction:

Cut 8 isosceles triangles

of Nylon

Sewn the triangles

Make 8 holes for the

threads

Make a hole in the center

Recovery subsystemParachute bending:

Fold in a half the parachute, keeping the thread taut.

Hold the centre of the parachute,and bend small triangles, from the ends toward the center.

From the far end of the threads start to wind the parachute and then continue rolling the threads.

Anchor the last thread to the structure of the cansat.

Budget of the mission:

Electronic

Subsystem……………………………………..TOTAL: 190€

Structure

Subsystem………………………………………..TOTAL: 19€

Parachute and Recovery

subsystem……………….TOTAL: 6€

TOTAL: 215€

Yeahhh!!..Also in our WEBSITE!!

http://sites.google.com/site/catsatteam/

Free Project Downloading: Sketches, codes, schematics ..