Author Topic: ESA/JAXA - BepiColombo updates  (Read 59971 times)

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #80 on: 07/06/2017 10:16 AM »

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #81 on: 07/06/2017 10:21 AM »

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #82 on: 07/06/2017 10:24 AM »

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Re: ESA/JAXA - BepiColombo updates
« Reply #83 on: 07/06/2017 10:34 AM »

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #84 on: 07/06/2017 10:40 AM »

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #85 on: 07/06/2017 10:45 AM »

Online FutureSpaceTourist

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Re: ESA/JAXA - BepiColombo updates
« Reply #86 on: 07/06/2017 12:39 PM »

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #87 on: 07/06/2017 02:46 PM »
More later... here phone image

Online eeergo

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Re: ESA/JAXA - BepiColombo updates
« Reply #88 on: 07/06/2017 03:20 PM »


That's a nice video, especially because it shows the status panel on the wall telling you what's going on. It's quite interesting to follow the frequency ramp-up while listening to the sound (and seeing the stack resonate at the structural frequencies).

It looks like they go from 0-100 Hz (sinusoidal) with an approximately exponential (?) frequency sweep. I assume this is a standard practice, and it doesn't look like it's trying to mimic the launch acoustic profile or duration for each frequency. Why is this so, and why is the frequency sweep at this speed considered ok for testing purposes? In particular, I'm wondering what gives confidence some component won't fail after N seconds in the [X,Y] frequency range, when being tested for M seconds only in that same frequency range (M<N).
-DaviD-

Offline bolun

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Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #90 on: 07/07/2017 09:10 AM »
Briefing material handed out to the press during yesterdays event.

Online FutureSpaceTourist

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Re: ESA/JAXA - BepiColombo updates
« Reply #91 on: 07/08/2017 11:30 AM »
Quote
Nice video of @BepiColombo MTM electric propulsion thruster steering test done at #ESTEC @ESA_Tech @ESA_nl

https://twitter.com/dutchspace/status/883647709940469761
« Last Edit: 07/10/2017 03:22 PM by Chris Bergin »

Offline Welsh Dragon

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Re: ESA/JAXA - BepiColombo updates
« Reply #92 on: 07/08/2017 01:22 PM »
Why do such low thrust engines need gimballing? I would have thought you just make them fixed and point the spacecraft. Or is it to allow for operation of fewer than all four thrusters, to keep thrust vector going through centre of mass in any arbitrary firing pattern?
« Last Edit: 07/08/2017 03:10 PM by Welsh Dragon »

Online Chris Bergin

Re: ESA/JAXA - BepiColombo updates
« Reply #93 on: 07/10/2017 03:46 PM »
Just because we haven't written a standalone article for this one! And it has no mention of "SpaceX" in it and so that people are linked to Jacques' fine coverage of the recent media event..... :)

https://www.nasaspaceflight.com/2017/07/bepicolombo-shaked-stacked-mercury-mission/

Online FutureSpaceTourist

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Re: ESA/JAXA - BepiColombo updates
« Reply #94 on: 07/10/2017 10:12 PM »
Picture from ESA

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #95 on: 07/11/2017 09:23 AM »

Online jacqmans

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Re: ESA/JAXA - BepiColombo updates
« Reply #96 on: 07/11/2017 09:40 AM »
BepiColombo was very kind to pose with me in the clean room.

I will have lots more photos later, will post them in L2

Online FutureSpaceTourist

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Re: ESA/JAXA - BepiColombo updates
« Reply #97 on: 07/13/2017 09:29 AM »
It seems everyone wants their photo with BepiColombo :)

Quote
Operations image of the week: flight controllers who will fly @BepiColombo meet their spacecraft @JAXA_en http://m.esa.int/spaceinimages/Images/2017/07/Robot_meets_its_masters

https://twitter.com/esaoperations/status/885402394674290689

Offline woods170

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Re: ESA/JAXA - BepiColombo updates
« Reply #98 on: 07/13/2017 11:52 AM »
It seems everyone wants their photo with BepiColombo :)

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Operations image of the week: flight controllers who will fly @BepiColombo meet their spacecraft @JAXA_en http://m.esa.int/spaceinimages/Images/2017/07/Robot_meets_its_masters

https://twitter.com/esaoperations/status/885402394674290689
Which is in fact very common throughout spaceflight history. It is just that most of the resulting images never make it to the general public.

Offline Star One

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Re: ESA/JAXA - BepiColombo updates
« Reply #99 on: 09/01/2017 07:34 PM »

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