NASA Contest: Design a Simple Deployment Mechanism

Papan Penjelasan Umum

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  Penganjur Peraduan

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  We have opened our next contest :"Design a Positioning Software Architecture" at https://www.freelancer.com/contest/NASA-Contest-Design-a-Positioning-Software-Architecture-1328512.html.

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  createwithwisdom

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  Congrats to winner, contest holder & participants..

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  Penganjur Peraduan

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  Please join us in congratulating Triassic R. as the winner for this challenge. Thanks to all of the participants for all of your hard work on this challenge. There were some really great designs and the evaluation was not easy. We hope that many of you will participate in the rest of the challenges that we will be posting over the next couple of months.

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     varunvp

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     Congratulations Triassic R. I'm happy to see a fellow Indian's contribution to space. To NASA - Out of curiosity, what was the differentiating factor, other than the presentation?(mine sucks!)

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     Myrds

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     Congratulations. After seeing your design, I realized that I can't even cope up with NASA's design quality. I can't even acquire 4 stars. Lol.

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  VProductionLLC

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  Just to be cleared I submitted 2 times, last day, when contest was still opened. Please check it out!

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     Penganjur Peraduan

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     Hi Viktor, we have checked all of our contests and do not see any submissions from you. We do see that your exit survey was completed on 6/27 but this contest ended on 6/18 so that is probably why your submission was not accepted. The freelancer site should not have allowed you to submit after 6/18, so we will check to see if the site is somehow allowing freelancers to submit after the submission deadline (but then not allowing them). We hope you will take what you developed and try and apply it to one of the other contests in this series. We will be running contests over the next couple of months and they are all related. Again, sorry that you submission could not be accepted after the deadline.

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  VProductionLLC

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  Hi, I joined in a last 24 h of contest and submit solution in a last minute. For just in case, my survey completion code is 92831. Did you receive my submission?

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     Penganjur Peraduan

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     This contest has been closed for a week now, so I'm afraid you missed the deadline (and it is surprising that the system let you make a submission). Are you sure you did not attempt to submit to one of the other contests? We see you survey code in the system, but not your submission. Good luck.

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  Penganjur Peraduan

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  This contest is now closed. Thank you for all of your hard work on some really great designs. The team will be evaluating the submissions and announcing the winners as soon as we can (likely about a week). There are several other contests currently active with even more launching over the next few months. We look forward to seeing more of this amazing talent! Thanks!

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  Penganjur Peraduan

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  Note that several entries are missing the exit survey code. Your submissions will be incomplete without them!

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  Penganjur Peraduan

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  We are now into the final 24 hours of this contest!!! Just a reminder to review all of the submission requirements (especially the attached submission guidelines) to make sure your design submission is complete. Don't wait until the last minute to upload since that can sometimes take longer than you expect (and we will not be able to extend the deadline or make exceptions for late submissions - even if they are late due to upload or technical problems). Thanks for everyone's hard work on these submissions! Once the contest is complete, we will begin the evaluation/judging process. Good luck!

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  Yashaswi26

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  Hi, the meaning of constraint C1 is not entirely clear regarding the SDM staying within the defined volume at "all times". Could you please explain that in more detail.

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  1. 
     Penganjur Peraduan

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     No matter what the SDM does to create the necessary movement via the linkage of the Point Mass, the SDM must always remain in the SDM volume.

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  ricardobastosi

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  Hello,
  
  The document is somewhat confusing perhaps tricky (maybe that is the idea of the challenge).
  
  Please validate my questions:
  1) If the requested SDM design will work only on ZX plane, its maximum axis stroke according to figure 2 would be 32.5mm to each direction (total 65mm each axis)?
  
  2) In section 3.1 "The SDM shall be able to move a point mass from an origin point to a fixed
  destination point" and then in section 4.4-C8 "Point Mass Definition: The Point Mass is an abstract representation of the robotic
  arm that the SDM will be integrated with." So, what will SDM do? From what I see, it is just a mere 2D manipulator that only needs to withstand the gravity force.
  
  3) Regarding 3.2.2 - R5 "Assume a maximum of 1 minute of operations" does it means 1minute of operation maximum per 1hour of time? 1.5Wh would give me about 3minutes of operation at steady 28watt power consuption.
  
  Thank you.

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  1. 
     Penganjur Peraduan

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     1) Could you please clarify the question. We are not exactly sure what you are asking?
     
     2) That is one possible interpretation of the challenge. That point mass would generate a constant force from gravity that your SDM would have to deal with as the SDM moves this point mass between the origin and destination points.
     
     3) An operation is a single displace and return with this provided power budget and you may take up to that one minute for those operations.

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  Yashaswi26

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  Hi, the meaning of constraint C1 is not entirely clear regarding the SDM staying within the defined volume at "all times". Could you please explain that in more detail.

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  phaser6250

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  I understand that a pair of origin and destination are on the same XZ plane, but will the SDM ever need to move up/down vertically for a different set of origin/destination that is on a different XZ plane?

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     Penganjur Peraduan

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     The SDM will only need to move the point mass between the origin and destination points outlined in this challenge.

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  LuisSaavedra14

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  Hello, I have a question, in the files the tolerances for each Cartesian position are specified, however it is also said that the way to reach the final point is of free choice, the question would be
  Is it necessary for the SDM to pass +/- 2.5 mm each Cartesian position? or I can go any way to the end point no matter how separated the SDM from the intermediate Cartesian positions

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     Penganjur Peraduan

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     It is necessary for your solution to be able to move the point mass to the destination and location points within the given tolerance. Your SDM can go in any way between the origin and destination points.

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  saifelsedawy

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  what are the material yield strength and density should i assume. i think you will not use a normal metal to reduce the weight.

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     Penganjur Peraduan

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     The choice of materials is part of your design.

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     saifelsedawy

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     but you said this contest is about the idea not about the mechanical design. it is ok at all but i think the material should be recommended from your experts. i will give you the idea and i hope you like it.

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  asnduart

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  Hello. I don't think I understood the challenge. How can I make something move if it is outside the reach of the constraining volume?

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     Penganjur Peraduan

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     Your SDM design will be connected to the Point Mass by a separately-designed linkage created by NASA.

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  Penganjur Peraduan

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  Since the registration process took a bit longer than expected, we are extending the deadline for this contest until June 18 at 9:00 AM Eastern Standard Time.

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  Noccos

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  Hi NASA! Just a quick question, maybe I missed it in the description but...What is the desired or ideal distance between Astrobee and the hand rail? Thanks in advance!

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     Noccos

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     Will it need to pan horizontally AND vertically once attached? Sorry for so many Qs, I just want to make sure my idea works for your situation.

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     Penganjur Peraduan

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     Yes

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  saifelsedawy

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  the point mas is a robotic arm. then, the mechanism must have zero degree of freedom at the destination points? i mean if there is no locking mechanism at the destination points or a load from the actuator -if it is a motor- then the forces on the robotic arm would make the the mechanism go back again to the box. i hope that was clear and the question is:
  -should i include a locking mechanism or a feedback to the actuator at each destination or that is out of scope?
  if i use a stepper motor then it would need a continuous current to keep in place an that would affect the power consumption. then i should know the time of working of the robotic arm after the mechanism go to its destination.

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     Penganjur Peraduan

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     The SDM should be able to stop at the destination and origin locations as constrained by the accuracy and time requirements. Once the point mass is at a location and the SDM stopped moving, the linkage as designed by NASA will lock in place and hold the Point Mass in location and handle any loads applied. The SDM is not responsible for holding the point mass in a location or dealing with forces once the point mass is locked in place.

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  MarinusK

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  By making the SDM to meet the volumetric constraint, while the destination point and origin point are outside of the constraint, it is assumed that the robotic arm should reach those points and not the SDM itself? And there is no budget mentioned, so the cost shouldn't be stated?

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     Penganjur Peraduan

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     All parts of your SDM design, including those that move to generate movement, must fit within the SDM volume. Your design's moving parts that generate the desired movement of the point mass will be connected to the point mass by a separately designed linkage created by NASA.
     
     There is no budget limit for your design of the SDM.

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  dincicivana709

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  Dir Sirs, how much times in 1 hour the material point need to pass from destination point to the origin point and back?

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     Penganjur Peraduan

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     The SDM must be able to displace and return once with the provided power budget and one should expect 1000 repeats of this displace-return action over the SDM's lifetime.

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  saifelsedawy

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  Must the return be on the same path? or on the same side I mean, can I use the -ve X direction?

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  1. 
     Penganjur Peraduan

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     The Return path, taken from the Destination Point to the Origin Point, does not have to be the same as the path from the Origin to the Destination.
     Also note that selection of both paths is entirely up to you, as we have only defined the endpoints.

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  mahpudincad80

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  Dear Sir, I am from the country of Indonesia, I hope to be able to give the best in this contest. Aamiin

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     Penganjur Peraduan

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     Great! We look forward to your submission.

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  dincicivana709

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  *1.5 Watt-hours?

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     Penganjur Peraduan

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     Can you provide more detail in your question?

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  anandvelandy3

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  Hello, Can two motors be used? Or are you looking for a mechanism that satisfies the requirement with a just single actuator source?

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     Penganjur Peraduan

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     You may use any number and any combination of mechanisms and motors you desire as long as they meet energy and SDM volume requirements.

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  rcwatson

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  Why is gravity part of the specification when this will be used in microgravity? For testing on earth? Overcoming inertia to move a large object?

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     Penganjur Peraduan

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     The inclusion of gravity was intentional and serves to simplify your design process. By defining a point mass under gravity, we are providing our worst-case loading conditions for when the SDM is in orbit. The testing and operating conditions you mention could occur, but would stay within the limits of this worst-case loading.

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  dincicivana709

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  1.5 What-hours?

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  mohanmehla11

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  Dear Sir, I am so excited to complete this project and design

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  1. 
     Penganjur Peraduan

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     We are glad to hear it and look forward to your submission.

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  andrewthix

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  With one end of the actuator attached to the point mass, is it to be assumed that the other end of the actuator is attached to the Geometric Origin? The volumetric constraint is also unclear for me. Does this constrain only apply to the actuator's "undeployed" state? Otherwise, the actuator appears to violate the constraint while in service.

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