High-Level Project Summary
We proposed a mechanism that avoid explosions and breaking parts to separate two parts or sections, we focus our ideas in the case where is needed to release the parachutes.Our proposed mechanism allows to release the reefing line of the parachutes during the different stages of the landing without cut it, this makes reusable the connections. What is more, the device allows an easily re-connection.The importance of this type of mechanism is in the fact that it is not necessary to break any component to release.
Link to Project "Demo"
Link to Final Project
Detailed Project Description
The device keeps in a locked position a shaft that is attached to the reefing line of the parachute, the locked position is achieved with bearings. The shaft has a cavity where the bearings fit.
The device has a cap that moves along the axis of the device, when this cap is in the retracted position the bearings have enough movement to allow the shaft to get inside the device. When the cap returns to the repose position, this fixes the bearings. This way the shaft is locked i that position until the cap is retracted.
It is expected that the conditions of operation of the mechanism secure the correct release of the cables.
We hope the device achieve an easy connection and connection of the reefing lines of the parachute, allowing the release without explosions.
We also consider that if another row of bearings is added, the loads should be more distributed and could hold more force before the device fails.
We use Solid Works to create the parts of the device, generate animations of the movement and analyze the behavior of the device under a determinated force.
Also we realize some calculations with Matlab.
Space Agency Data
All the data we take into consideration for the estimations were taken from NASA documents and publications. These can be found on the references.
Hackathon Journey
To many of us, this was our first hackathon and Space Apps Challenge, so it was a very new experience. At the beginning we were quite relaxed, gradually we encountered many problems but with teamwork we manage to overcome them.
Probably the most important thing we learned trough this challenge was about the complexity of the mechanisms used in rockets due the conditions o work of these.
We selected this challenge based in the knowledge we have from our careers, most of us take subjects related to mechanics so we consider this challenge would fit us better than the others.
Most of the challenges we encountered were about the dimension of the mechanism, due to the objectives of the challenge we find difficult to fit a mechanism in that volume. After many ideas and drafts from all the members, we finally found an idea that convinced us all.
References
-DC motor
https://tostatronic.com/store/motores/101-motor-corriente-directa-cd-a-5v.html
-Elastic modulus
https://www.sonelastic.com/es/fundamentos/tablas-propiedades-materiales/metales-ferrosos.html
-Stainless Steel cable
https://www.amazon.com.mx/MHUI-Inoxidable-Proyectos-Decoraci%C3%B3n-0-4mmX100m/dp/B08R213XMN/ref=asc_df_B08R1ZYS3J/?tag=gledskshopmx-20&linkCode=df0&hvadid=450930989940&hvpos=&hvnetw=g&hvrand=6325778185587593328&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=20709&hvtargid=pla-1393738803545&th=1
-Earth landing
https://www.hq.nasa.gov/alsj/CSM12_Earth_Landing_Subsystem_pp93-98.pdf
-Future rockets
https://www.nasa.gov/audience/forstudents/nasaandyou/home/rockets_bkgd_sp.html
-Recuperation system design using first stage rocket's parachutes for placement of picosatellites in low orbit
https://red.uao.edu.co/bitstream/handle/10614/6307/T04318.pdf?sequence=1&isAllowed=y
-Von Mises maximum stress criterion
http://help.solidworks.com/2011/spanish/SolidWorks/cworks/legacyhelp/simulation/checking_stresses/prot_vonm.html
Tags
#hardware, #mechanics
Global Judging
This project has been submitted for consideration during the Judging process.