It's a Test

Mise provedené firmou Rocket Lab
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Amper
Zkušený inženýr kosmonautiky
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Re: RocketLab

Příspěvek od Amper »

nemusel to byt abort od range ale klidne to mohlo byt fail safe reseni na palube. Raketa nemela signal a tak se radsi znicila nez aby letela dal. Nevime jak moc je ridici system samostatny a jak moc spoleha na dodavane korekce od pozemniho segmentu.
JiHO
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Re: RocketLab

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To Amper:

Primo z webu Rocketlab:
Four minutes into the flight, at an altitude of 224 km, the equipment lost contact with the rocket temporarily and, according to standard operating procedures, range safety officials terminated the flight. Data, including that from Rocket Lab’s own telemetry equipment, confirmed the rocket was following a nominal trajectory and the vehicle was performing as planned at the time of termination.

Jinak zdravim do Plzne, narodil jsem se tam a zil dlouha leta na Slovanech :)
What is the most important thing a man needs if he wants to build? The will to do it. Wernher Von Braun
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Amper
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Re: RocketLab

Příspěvek od Amper »

aha, na original jsem nekoukal takze to opravdu odpalila range. Tak asi nechteli rikat ze to odbouchli kdyz nevedeli proc
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laik
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Re: RocketLab

Příspěvek od laik »

https://spaceflightnow.com/2017/08/11/q ... ocket-lab/

Odpovídám sám sobě:
Q: Some of video from the first test launch showed the vehicle rolling when it climbed off the pad. Was that an issue or expected?

A: The bottom line on that one is the guidance team didn’t want to over-constrain the roll. The roll is the least damped axis. When you’ve got nine engines on the bottom, theres’ a lot of plume-plume interaction. The nine engines sort of interact with each other, and it’s very easy to cause roll torques. What the GNC (Guidance, Navigation and Control) team decided to do is we would let the vehicle roll, but we would control it to a rate. So the vehicle rolled to the pre-programmed rate, and that gave us the ability to characterize all of the engines and the roll characteristics of the vehicle. On the next flight, we probably won’t run that same algorithm, or we’ll keep the vehicle in one attitude, but for us, it was all part of the test program to learn and to characterize all those weird torques that are impossible to try and learn on the ground.

Q: What do you use for roll control?

A: All of the nine engines on the bottom are gimballed. It’s a simple gimbal command that controls the roll. On the second stage, it’s a Reaction Control System which controls the roll. If you notice, on the second stage because there’s only one engine and we don’t have all that plume-plume interaction funkiness, you’ll see in the videos the second stage didn’t roll at all. It was rock solid and rigid because there was no external influencing to create the roll.

If you watch the first Falcon 9 launch, I think they did the same thing as us. They had a roll on the first Falcon 9 launch. They probably did the exact thing as us trying to characterize all those weird conditions.

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