[General] A Letter From Mojave - A Rocket Flight Opportunity For Code - Project Prometheus of Masten Space Systems
david
ainut at knology.net
Wed Jul 16 22:53:23 CDT 2014
The "9 DOF" unit can easily be your low-power, small IMU.
On 07/16/2014 08:49 PM, Stephan Henning wrote:
> David is correct, unless you are using a very very high end GPS module
> (which most likely would have an internal IMU at this point), do not
> rely on its data for altitude unless you have to. There are sensors
> out there with better resolution, , update rate. and are nice and
> cheap that would work just as well. GPS can be very finicky, redundant
> data sources is a very good thing to have.
>
> I haven't been paying very close attention to this conversation
> thread, but if the sensor package can be built cheap enough, it may
> not be a bad idea to have two. I would be worth spending some time to
> make sure all the sensor data timing is well understood and
> synchronized. You never know what you might be able to learn from a
> successful (or failed) flight if you have accurate time data attached
> to the sensor measurements.
>
> It might be worth investigating having a redundant memory storage
> device, maybe back it up on a 'rugged' usb drive that might have a
> chance of surviving a flight failure.
>
> -stephan
>
>
> On Wed, Jul 16, 2014 at 7:28 PM, david <ainut at knology.net
> <mailto:ainut at knology.net>> wrote:
>
> There are 9+ (so-called) DOF sensors on the market now in a single
> package (some under $40), obviating the need for a separate
> accelerometer. It would definitely be interesting to see the
> G-forces as applied all along the track.
> Unless someone in the project is married to the RPi, the
> BeagleBone Black (BBB) has a lot more compute power and functionality.
>
> Don't count on the accuracy of GPS altitude unless you have a
> confirmed WAAS (or equivalent) signal all during the flight. GPS
> antenna is a major concern in this type of environment. Some GPS
> modules can use signals besides just the ones from the US, but the
> other countries' WAAS-equivalents are even more flaky than ours!
> :) The MTK3339 GPS (like used in Adafruit's Ultimate GPS
> products) seems to be robust. I'm just beginning to program it
> now. Very low power and can be had for under $16 in small
> quantities, or with circuit board and glue for about $40 from
> Adafruit.
>
> For recording video and metadata, again, the BBB is a good choice
> as I have confirmed it works with a 32 Gb SD card. By the weekend,
> I'll know it if works with the newer 64 Gb SD cards.
>
> David M.
>
>
>
> On 07/16/2014 05:49 PM, Ethan Chew wrote:
>> Cool!
>>
>> So we are talking about the following things we want to do:
>>
>> * In-Flight Automated Photography
>> o Overlay in-flight metadata from on-board sensors; GPS
>> coordinates, altitude, temperature, air pressure, CO2,
>> speed, and time from launch (T+).
>> o Can be done either in-flight or as post-processing
>> (encode flight data as exif, add overlay in post).
>> * Record flight data for post-flight modelling and
>> visualization opportunities.
>> o Record 6-dof, acceleration and skin temperature data
>> in-flight.
>> o Calculate ballistic coefficient to add to visualization
>> opportunities.
>>
>> And that would mean the following sensors:
>>
>> * Video/Photo Camera
>> * GPS (speed & altitude can be derived from GPS data.)
>> * Altimeter
>> * Thermometer (setup for ambient and skin temperature readings)
>> * Barometer
>> * CO2 Gas Sensor
>> * Clock (can be done by the Raspberry Pi.)
>> * 6-dof sensing
>> * Accelerometers
>>
>> Made a wiki: https://256.makerslocal.org/wiki/Flight_Code_Project
>>
>> - Ethan
>>
>> P.S. Of administrative note; I got a clarification from Masten
>> about educational institutions flying for free. At this point in
>> time, the Prometheus Project is open only to educational
>> institutions as Masten is seeking to encourage high school and
>> college students to get into engineering. Therefore, the project
>> would have to involve students in designing, building, and
>> programming the flight experiments. The project could either be
>> run as a class and teaches UAH and other Huntsville high school
>> students or the makers involved would academically advise a
>> student team.
>>
>> Kix, taking a page out of your book, how did you run your program
>> with FIRST Robotics when you were in the Makers Local 256 shop?
>>
>>
>>
>> On Wed, Jul 16, 2014 at 8:05 AM, Phillip Showers
>> <phillip.showers at gmail.com <mailto:phillip.showers at gmail.com>> wrote:
>>
>> you definitely want 6-dof for post flight modelling as well.
>> tie in a common variable like time and pump in stuff like
>> 6-dof, acceleration and skin temp. You can probably just
>> calculate the ballistic coefficient from cad but that gets
>> you started on some really fun visualization opportunities.
>>
>> Phil
>>
>>
>> On Wed, Jul 16, 2014 at 8:34 AM, Satyam Nayak
>> <nayaksatyam at gmail.com <mailto:nayaksatyam at gmail.com>> wrote:
>>
>> I ++1 Josh's suggestion about adding metadata to the
>> picture.
>>
>>
>> On Wed, Jul 16, 2014 at 8:57 AM, WebDawg
>> <webdawg at gmail.com <mailto:webdawg at gmail.com>> wrote:
>>
>> Even better to have it upload that data somewhere
>> after the launch for viewing after.
>>
>>
>> On Wed, Jul 16, 2014 at 8:51 AM, Joshua Pritt
>> <ramgarden at gmail.com <mailto:ramgarden at gmail.com>> wrote:
>>
>> It would be neat to overlay some data on each
>> photo like GPS coords, altitude, temperature, air
>> pressure, CO2, speed, and time from launch (T+).
>>
>>
>> On Wed, Jul 16, 2014 at 8:38 AM, Ethan Chew
>> <spacefelix at gmail.com
>> <mailto:spacefelix at gmail.com>> wrote:
>>
>> Just suggested to Masten that they add a
>> picture/video camera (of the size and quality
>> level of the one in your cell phone) to the
>> sensor suite. ;)
>>
>> On Jul 16, 2014 5:08 AM, "Satyam Nayak"
>> <nayaksatyam at gmail.com
>> <mailto:nayaksatyam at gmail.com>> wrote:
>>
>> I was thinking of doing something similar
>> to HSIS where we put a camera on auto
>> trigger and took a bunch of pictures of
>> the flight.
>>
>>
>> On Wed, Jul 16, 2014 at 6:40 AM, WebDawg
>> <webdawg at gmail.com
>> <mailto:webdawg at gmail.com>> wrote:
>>
>> Anyone plan to put any effort into this?
>>
>>
>> On Wed, Jul 16, 2014 at 4:37 AM,
>> Ethan Chew <spacefelix at gmail.com
>> <mailto:spacefelix at gmail.com>> wrote:
>>
>> P.S. Note on the sensor suite;
>> the hardware in the suite will be
>> determined by Masten. However,
>> at this point in time of Project
>> Prometheus, Masten is open to
>> input on what sensor hardware to
>> install. Please send sensor
>> hardware suggestions to
>> prometheus at masten.aero
>> <mailto:prometheus at masten.aero>.
>>
>>
>> On Tue, Jul 15, 2014 at 6:42 AM,
>> Ethan Chew <spacefelix at gmail.com
>> <mailto:spacefelix at gmail.com>> wrote:
>>
>> Hello!
>>
>> On Jul 15, 2014 6:34 AM,
>> "Jeff Cotten"
>> <omegix at gmail.com
>> <mailto:omegix at gmail.com>> wrote:
>> >
>> >
>> > Hey Ethan, will the
>> raspberry pi be connected to
>> the internet during the test?
>>
>> Sorry, no. To avoid
>> interfering with Xombie's
>> control system, the crew has
>> told me no transmitters are
>> allowed.
>>
>> >
>> > If I wrote a piece of code
>> that logged into #makerslocal
>> and reported back the
>> altitude, would it it be able
>> to reach the freenode server?
>>
>> You'd need to make an
>> isolated flight data
>> recorder. Due to the
>> restriction on transmitters,
>> you can only download your
>> data off a shore connection
>> when the vehicle is back on
>> the ground.
>>
>> - Ethan
>>
>> >
>> >
>> > On Tue, Jul 15, 2014 at
>> 12:08 AM, Ethan Chew
>> <spacefelix at gmail.com
>> <mailto:spacefelix at gmail.com>> wrote:
>> >>
>> >> Hello,
>> >>
>> >> Take note, it is my
>> current understanding that
>> educational institutions get
>> to fly for free.
>> >>
>> >> From Masten Space Systems
>> in Mojave, CA
>> (http://masten.aero/), an
>> opportunity to fly code on a
>> vertical takeoff and landing
>> rocket (such as Xombie:
>> http://youtu.be/A5b9LnzjGgU)
>> on Project Prometheus:
>> >>
>> >>
>> http://masten.aero/2014/05/project-prometheus/
>> >>
>> >> In summary; there is a
>> Raspberry Pi on board that is
>> connected to a sensor suite.
>> Send Masten some code you
>> want to run during a flight
>> that processes inputs from
>> the sensors during the
>> flight. The project is for
>> the rapid, streamlined
>> development of tools relating
>> to; visual navigation,
>> landing detection, mass
>> estimation
>> and position/attitude
>> estimation. You can reach
>> them at
>> prometheus at masten.aero
>> <mailto:prometheus at masten.aero> with
>> input and questions about the
>> program.
>> >>
>> >> Quote:
>> >>
>> >>>> the Masten Team has also
>> been thinking about ways we
>> could engage the broader
>> community and increase
>> accessibility to our VTVL
>> vehicles. One of the largest
>> barriers to entry for any
>> technology developer seeking
>> to conduct aerospace flight
>> testing is access to a
>> vehicle. Limited access to an
>> integrated GPS/IMU navigation
>> system, flight-rated
>> computing platforms, and
>> sensors present additional
>> challenges to innovators. In
>> the spirit of broadening
>> access to aerospace
>> resources, we have had a
>> project cooking in the
>> background called Prometheus.
>> >>>>
>> >>>>
>> >>>> Project Prometheus is a
>> Masten program designed to
>> foster the development of
>> flight-test ready
>> technologies by innovators in
>> academic and research
>> settings. By implementing a
>> standardized interface
>> between Masten vehicles and
>> experimental software and
>> hardware tools, Prometheus
>> will provide a streamlined,
>> efficient path for technology
>> maturation throughout the
>> course of tool conception,
>> development and flight test.
>> Access to uniform,
>> flight-tested hardware and
>> software development
>> framework for innovators will
>> ultimately reduce
>> integration, development and
>> other flight test costs.
>> >>
>> >>
>> >>
>> >> - Ethan/spacefelix
>> >>
>> >>
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>>
>> --
>>
>> V/r Ethan
>>
>> Working E-mail:
>> spacefelix at gmail.com
>> <mailto:spacefelix at gmail.com>
>> Business E-mail:
>> shinen.chew at gmail.com
>> <mailto:shinen.chew at gmail.com>
>> LinkedIn:
>> www.linkedin.com/in/ethanchew
>> <http://www.linkedin.com/in/ethanchew>
>> US Cell: +12177222103
>> Skype: flyingfelix2
>>
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>> --
>>
>> V/r Ethan
>>
>> Working E-mail: spacefelix at gmail.com <mailto:spacefelix at gmail.com>
>> Business E-mail: shinen.chew at gmail.com <mailto:shinen.chew at gmail.com>
>> LinkedIn: www.linkedin.com/in/ethanchew
>> <http://www.linkedin.com/in/ethanchew>
>> US Cell: +12177222103
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