MAVEN -- Atlas V -- 18.11.2013 -- Canaveral

Автор Salo, 16.09.2008 16:05:48

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X

Цитата
Ээээ...
  Я один вижу здесь Нечто грубо вырезанное автогеном из листового металла и так же грубо сваренное?
  Даже края шлифмашинкой не зачищены...

  Работал когда-то на машиностроительном предприятии и тама таких конструкций  насмотрелся

Дмитрий Виницкий

Вы автогеном дюраль резали? Неудивительно, что вас выгнали...

instml

A stressful test
February 27
Цитата

As I stood watching the static loads test of the MAVEN spacecraft structure, my thoughts went back to my high school physics class, where we built bridges out of balsa wood. To see which bridge was the strongest, the teacher applied a force to the center until the bridge broke. Each student would cringe as the pressure increased, waiting for the sound of splintering wood. I had that same feeling now.

The static test is one of the key tests for the structure. It's designed to ensure that the structure will withstand the extreme forces of launch. The structure provides the framework that supports all of the pieces that together make up the MAVEN spacecraft. Science instruments, computers, batteries, radios, solar arrays, propulsion--nearly everything gets attached to the structure. It has to be strong enough to withstand the intense shaking and acceleration during launch, but light enough for a single Atlas V to lift it, and the other equipment, away from Earth and send it all the way to Mars. An all-metal structure would be too heavy, so we make it primarily out of composite panels. The core structure weighs less than an average NFL lineman, but it has to support a fully-fueled spacecraft weighing as much as a full size SUV, all while the rocket is accelerating it six times faster than a Ferrari.

The static test is conducted by using hydraulic rams to apply controlled force to critical points on the structure. Load cells, strain gages, and displacement transducers are used to precisely measure the effects. The forces we apply are higher than what we expect to actually see at launch. We always design and test with this margin because of the unexpected. The total forces from all of the rams we applied during the most stressing test exceeded 35 tons. The success criteria is simple: if the structure does not break and its deflections match our computer models, then we know it was properly designed and built correctly.

I listened to the groans of the structure as the test progressed and wondered if I would hear the sound of splintering composite panels, just like the sound of my bridge breaking all those years ago. I didn't hear it. The structures team had done an outstanding job designing and building the structure, and we passed the test with flying colors. The structure was now ready to be handed over to the propulsion team so that they could start installing the fuel tanks, thrusters and propellant tubes. I could breathe a little easier, at least for awhile.

-Guy Beutelschies, MAVEN Flight Systems Manager, Lockheed Martin
http://lasp.colorado.edu/home/maven/2012/02/27/a-stressful-test/
Go MSL!

instml



The MAVEN team includes experts from multiple institutions and disciplines. The team gathered in July 2011 for the full mission Critical Design Review at Goddard Space Flight Center. (Courtesy MAVEN)
Go MSL!


X

ЦитатаВы автогеном дюраль резали? Неудивительно, что вас выгнали...

"...we make it primarily out of composite panels. ..."  (с)

Дмитрий Виницкий

Людей, не читающих газет, О.Бендер в детстве, убивал из рогатки:

Aluminium Composite Panel pvdf

ЦитатаAluminium composite panel, Fluorocarbon PVDF cladding panel is made of a mixture of fluorocarbon resin with fluorine enyne as the basic monomer, paint, alcohol ester solvent and accessory ingredients.
Aluminum-magnesium alloy is the combination of the major element-aluminum and small quality of magnesium or other metallic materials for strengthening the hardness. Due to its metallic property,the heat conductivity performance and the intensity are particular obvious. Meanwhile,the alloy is relatively of high flexibility and bending and abrasion-resistance. It is light weighted and of low density and of strong anti-press property. Due to magnesium,the alloy has great anti-corrosion property. So the material can be largely applied in the outdoor building decoration with large scale.
Aluminum-manganese alloy:the element of the alloy is manganese,which has excellent forming performance,high corrosion-resistance,fine welding property and electrical conductivity. Its anti-press intensity is much higher than 1100.This kind of alloy can be applied in signs and washing machines cylinder shell.

http://www.feitengacp.com/product/267-aluminium-composite-panel-pvdf-0539/

Agent

ЦитатаЭэээ...
  Я один вижу здесь Нечто грубо вырезанное автогеном из листового металла и так же грубо сваренное?
  Даже края шлифмашинкой не зачищены...

  Работал когда-то на машиностроительном предприятии и тама таких конструкций  насмотрелся
Это сотовые панели. Вряд ли вы видели такое там где работали.

Vladimir

Цитата
ЦитатаЭэээ...
  Я один вижу здесь Нечто грубо вырезанное автогеном из листового металла и так же грубо сваренное?
  Даже края шлифмашинкой не зачищены...

  Работал когда-то на машиностроительном предприятии и тама таких конструкций  насмотрелся
Это сотовые панели. Вряд ли вы видели такое там где работали.
В частности, конструкция "Электро", "Спектра-Р" и "Фобоса-грунта" именно из таких панелей и состоит

bsdv

Цитата
Цитата
ЦитатаЭэээ...
  Я один вижу здесь Нечто грубо вырезанное автогеном из листового металла и так же грубо сваренное?
  Даже края шлифмашинкой не зачищены...

  Работал когда-то на машиностроительном предприятии и тама таких конструкций  насмотрелся
Это сотовые панели. Вряд ли вы видели такое там где работали.
В частности, конструкция "Электро", "Спектра-Р" и "Фобоса-грунта" именно из таких панелей и состоит

Только здесь каркас совсем не наблюдается :D

X

ЦитатаЭто сотовые панели.
А, ну да - эти соты и выглядят как грубо сделанный автогеном срез  ;)

Дмитрий Виницкий

А сантиметровая стальная плита на спутнике вас не смутила? Или вы действительно, автогеном дюраль резали?

Потусторонний

А бак - цилиндр в центре? соты, вафля, стрингеры, просто оболочка или что? мотаный что-ли?

instml

Images Show Integration of MAVEN Propellant Tank

Цитата

This photo shows the large hydrazine propellant tank prior to it being installed in the core structure of the MAVEN spacecraft at a Lockheed Martin clean room near Denver. The tank will hold 450 gallons of hydrazine propellant and is 6 feet 2 inches tall. (Credit: Lockheed Martin)



The tank was built by ATK Aerospace Group at its facility in Commerce, Calif. The primary structure in the background is cube shaped at 7.5 feet x 7.5 feet x 6.5 feet high. Built out of composite panels comprised of aluminum honeycomb sandwiched between graphite composite face sheets, the entire structure only weighs 275 pounds. MAVEN is scheduled to launch in November 2013 and will be the first mission devoted to understanding the Martian upper atmosphere. (Credit: Lockheed Martin)



The MAVEN spacecraft core structure is successfully lowered and mated to the hydrazine propulsion tank and boat tail assembly at Lockheed Martin, Denver, Colo. (Credit: Lockheed Martin)


The goal of the Mars Atmosphere And Volatile EvolutioN (MAVEN) program is to determine the role that loss of atmospheric gas to space played in changing the Martian climate through time. MAVEN will determine how much of the Martian atmosphere has been lost over time by measuring the current rate of escape to space and gathering enough information about the relevant processes to allow extrapolation backward in time.

MAVEN's principal investigator is based at the University of Colorado at Boulder's Laboratory for Atmospheric and Space Physics. The university will provide science operations, build instruments, and lead Education/Public Outreach. NASA Goddard Space Flight Center in Greenbelt, Maryland, will manage the MAVEN mission and provide instruments. Lockheed Martin of Littleton, Colo., will build the spacecraft and perform mission operations. The University of California-Berkeley Space Sciences Laboratory will build instruments for the mission. NASA's Jet Propulsion Laboratory, Pasadena, Calif., will provide Program management via the Mars Program Office, as well as navigation support, the Deep Space Network, and the Electra telecommunications relay hardware and operations.
http://www.nasa.gov/mission_pages/maven/news/propellant-tank.html
http://www.lockheedmartin.com/us/news/press-releases/2012/april/0416-ss-maven.html
Go MSL!

ronatu

Когда жизнь экзаменует - первыми сдают нервы.

instml

NASA Goddard Delivers Magnetometers for NASA's Next Mission to Mars
Цитата

Magnetometers built by scientists and engineers at NASA Goddard Space Flight Center in Greenbelt, Md. for NASA's Mars Atmosphere And Volatile EvolutioN (MAVEN) mission have been delivered to the University of California at Berkeley Space Sciences Laboratory for integration into the Particles and Field Package.

"The team worked hard and completed delivery of the magnetometers on schedule," said Jack Connerney, Magnetometer Instrument Lead from NASA Goddard. "We are looking forward to launch, orbit insertion and seeing the data come back."

The pair of flux gate magnetometers measures the magnetic field at the location of the spacecraft. As part of the Particles and Fields Package, the magnetometer sensors are positioned at the outermost ends of the solar panels to keep them as far away as possible from stray magnetic fields generated by the spacecraft. Since the motion of escaping charged particles is governed by the magnetic field, this measurement is important in understanding how the solar wind interacts with the planet's atmosphere and causes loss to space.

"The geometry of the magnetic field determines where particles go to and where they come from," said Connerney."If we want to understand particle motion, we need to visualize how the magnetic field behaves throughout the Mars environment."

Scheduled for launch in late 2013, MAVEN will be the first mission devoted to understanding the martian upper atmosphere. The goal of MAVEN is to determine the history of the loss of atmospheric gases to space through time, providing answers about Mars climate evolution. By measuring the current rate of escape to space and gathering enough information about the relevant processes, scientists will be able to infer how the planet's atmosphere evolved in time.

The instrument is powered on during the spacecraft cruise to Mars. Once powered, it has a heart that beats once per second. Every second, the instrument sends a packet of data to the Particles and Fields Package. Each packet includes 32 vector samples of the magnetic field. The Particles and Fields Package accepts the data and passes it on to the spacecraft. The magnetic field vectors are also made available to the other instruments onboard the spacecraft in real time.

MAVEN's magnetometers were designed by a Goddard team that has a long and varied history with building magnetometers for space research. They have provided instruments for many previous and upcoming planetary and heliophysics missions.

The MAVEN spacecraft will carry three instrument suites. The Particles and Fields Package, built by the University of California at Berkeley with support from University of Colorado at Boulder's Laboratory for Atmospheric and Space Physics (CU/LASP) and NASA Goddard, contains six instruments that will characterize the solar wind and the ionosphere of the planet. The Remote Sensing Package, built by CU/LASP, will determine global characteristics of the upper atmosphere and ionosphere. The Neutral Gas and Ion Mass Spectrometer, provided by NASA Goddard, will measure the composition and isotopes of neutral ions.

"The magnetometer is the first of the science instruments to be completed and delivered," said Bruce Jakosky, MAVEN Principal Investigator from CU/LASP. "It's really exciting to see the payload now starting to come together. This is an important milestone in our path toward getting to Mars and using our measurements to answer questions about the history of the martian atmosphere."

NASA Goddard manages the project and is building two of the science instruments for the mission. In addition to the principal investigator coming from CU/LASP, the university provides science operations, is building science instruments, and leads education/public outreach. Lockheed Martin of Littleton, Colo., is building the spacecraft and is responsible for mission operations. The University of California at Berkeley Space Sciences Laboratory is building science instruments for the mission. NASA's Jet Propulsion Laboratory, Pasadena, Calif., provides navigation support, the Deep Space Network, and the Electra telecommunications relay hardware and operations.
http://www.nasa.gov/mission_pages/maven/news/magnetometers.html
Go MSL!

Сергио

Цитата
ЦитатаЭэээ...
  Я один вижу здесь Нечто грубо вырезанное автогеном из листового металла и так же грубо сваренное?
  Даже края шлифмашинкой не зачищены...

  Работал когда-то на машиностроительном предприятии и тама таких конструкций  насмотрелся
Это сотовые панели. Вряд ли вы видели такое там где работали.

да это судостроительная сталь, вырезали, прихватили сваркой, счаз отпескоструят и красить будут. на картинке сварщики судокорпусники. из их должностной инструкции - "Разметка по чертежам несложных деталей криволинейного контура, Испытание сварных швов конструкций, не связанных с корпусом судна, на непроницаемость (обдувом воздуха, керосино-маловое, поливом воды) с устранением выявленных недостатков"

ФГ разве не так делали?
/ШУТКО/

Space Alien

ЦитатаСпециалисты приступили к окончательной сборке марсианского зонда Maven[/size]

Специалисты компании Lockheed Martin приступили к окончательной сборке марсианского орбитального зонда НАСА Maven (Mars Atmosphere and Volatile EvolutioN), запуск которого планируется на ноябрь 2013 года, говорится в сообщении компании.

В течение следующих пяти месяцев инженеры и техники будут устанавливать на каркас космического аппарата компоненты различных подсистем - навигационные приборы, системы связи, ориентации и управления, терморегуляции, элементы энергосистемы. Двигатели были установлены на зонд ранее и были опробованы в середине августа.

Проект Maven, одобренный НАСА в октябре 2010 года, призван выяснить, как Марс потерял большую часть своей атмосферы. Ученым известно, что в прошлом у Марса была более плотная атмосфера, допускающая наличие на поверхности жидкой воды. Большая часть этой атмосферы была потеряна.

Зонд Maven проведет точные научные измерения сегодняшней скорости потери атмосферы, что даст ученым возможность определить, какую роль эта потеря сыграла в изменении марсианского климата, и заглянуть в прошлое красной планеты.

Maven может присоединиться к другим орбитальным зондам НАСА, уже изучающим Марс - "Марс-Одиссей", работающему с 2001 года, более новому Mars Reconnaissance Orbiter (MRO), а также к европейскому "Марс-Экспрессу". Кроме того, в 2016 году в рамках совместного проекта России и ЕКА планируется запуск аппарата Mars Trace Gas Mission (TGM), который также будет детально исследовать марсианскую атмосферу.

http://ria.ru/science/20120911/747977613.html

instml

19.11.2012 03:53:33 #39 Последнее редактирование: 19.11.2012 02:54:09 от instml
PRESS RELEASE: Instrument Delivered for NASA's Upcoming Mars Mission

November 16

GREENBELT, Md. - A remote sensing instrument that will peer into the ultraviolet to offer clues to how Mars might have lost its atmosphere has arrived at Lockheed Martin for integration into NASA's Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft.
"The Remote Sensing package team built a system that meets all technical requirements and delivered it on schedule and on budget," said David Mitchell, MAVEN project manager fr om NASA's Goddard Space Flight Center in Greenbelt, Md. "I look forward to the instrument's next level of integration onto the spacecraft and ultimately the science it will provide."


 
The Remote Sensing package consists of an Imaging UltraViolet Spectrograph (IUVS) and its control electronics box, the Remote Sensing Data Processing Unit (RSDPU). The Remote Sensing package was conceived, designed and built by the University of Colorado's Laboratory for Atmospheric and Space Physics (CU/LASP) at Boulder, under contract to NASA Goddard.
The Imaging UltraViolet Spectrograph collects the light and spreads it out into spectra and records the spectra using imaging detectors. IUVS is the eyes of the instrument. The Remote Sensing Data Processing Unit is the main electronics box that controls IUVS and communicates with the spacecraft. RSDPU receives and executes the commands sent to tell IUVS when and where to look. RSDPU is the brain of the instrument.
"The IUVS performs 'remote sensing,' meaning we can study the planet and its atmosphere at a distance through the light it emits," said Nick Schneider, IUVS lead scientist from CU/LASP. "Ultraviolet light is especially diagnostic of the state of the atmosphere, so our instrument provides the global context of the whole atmosphere for the local measurements made by the rest of the payload."
The Remote Sensing package will be turned on for its initial checkout 21 days after launch. Later in the cruise phase of the mission from Earth to Mars, the package will be powered on twice more for state-of-health checks and in-flight calibration.
"With the delivery of this package, we are shifting from assembling the basic spacecraft to focusing on getting the science instruments onto the spacecraft," said Bruce Jakosky, MAVEN principal investigator from CU/LASP. "This is a major step toward getting us to launch and then getting the science return from the mission."
Launching late next year, MAVEN will be the first mission devoted to understanding the Martian upper atmosphere. The goal of MAVEN is to determine the history of the loss of atmospheric gases to space through time, providing answers about Mars climate evolution. By measuring the current rate of escape to space and gathering enough information about the relevant processes, scientists will be able to infer how the planet's atmosphere evolved in time.
The MAVEN spacecraft will carry two other instrument suites. The Particles and Fields Package, built by the University of California at Berkeley Space Science Laboratory with support from University of Colorado at Boulder's Laboratory for Atmospheric and Space Physics (CU/LASP) and NASA Goddard, contains six instruments that will characterize the solar wind and the ionosphere of the planet. The Neutral Gas and Ion Mass Spectrometer, provided by NASA Goddard, will measure the composition and isotopes of neutral ions.
"Three of the big milestones in an instrument builder's life are the day you get sel ected to fly on a mission, the day you deliver the instrument to the spacecraft to get ready for launch, and the day that it gets wh ere it's going and data starts flowing back from space," said Mark Lankton, Remote Sensing package program manager fr om CU/LASP. "The Remote Sensing team is really happy to have gotten to the second milestone, and we can hardly wait to reach the third."
MAVEN's principal investigator is based at CU/LASP. The university will provide science operations, build instruments and lead Education/Public Outreach. NASA Goddard manages the project and is building two of the science instruments for the mission. Lockheed Martin of Littleton, Colo., is building the spacecraft and is responsible for mission operations. The University of California at Berkeley Space Sciences Laboratory is building science instruments for the mission. NASA's Jet Propulsion Laboratory, Pasadena, Calif., provides navigation support, the Deep Space Network and the Electra telecommunications relay hardware and operations.

http://lasp.colorado.edu/home/maven/2012/11/16/press-release-instrument-delivered-for-nasas-upcoming-mars-mission/
Go MSL!