Deploy Able Booms

8/3/2019 Deploy Able Booms

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Astro-und Feinwerktechnik

Adlershof GmbH

Magnetische

Sondierungsgeräte

Deployable Booms

GmbH

IngenieurbüroMarkus Thiel

Simulation, Analysis,

Mechanical Engineering.



Space-provendeployment mechanisms

aluminium socket with a titaniumhinge on top.

The status of the systems ismonitored by micro - switchesand temperature sensors at allclamps and hinges.

From conceptual design to excellent products -A deployable boom for Double Star

The satellites are equipped eachwith two 3m-booms to deploymagnetometer sensors. A singleboom consists of two CFRP(carbon-fiber reinforced plastic)segments, interconnected bytitanium hinges.

The mechanical interface to thespacecraft structure is a rigid

n 2003 and 2004, theonsortium has deliveredeployable booms for Double

Star, the first joint mission of SA and the Chinese Space

Agency. Within this mission, twocientific satellites have been

aunched to explore themagnetosphere, one in a nearquatorial, the other in a polarrbit.

From ideas to qualified systems

High-reliable deploymentmechanisms are essential for theuccess of space projects.

Antennas have to be deployednd oriented to establishommunication links, sensitivecientific sensors like

magnetometers require anccurate alignment at an outer

position where noise from thepacecraft is lower.

Three companies, Astro- undFeinwerktechnik Adlershof GmbH, Magson GmbH andIngenieurbüro Thiel havedecided to combine theirheritage and enthusiasm forspace engineering to form acenter of competence fordeployment mechanisms and,in particular, deployable booms.

Significant contributions tomissions like Equator-S,ROSETTA and Double Star aren evidence of our skills inimulation and analysis,

mechanical and electricalngineering, manufacturing and

ssembly, integration anderification. Our approach is to

procure complete sub-systems,including mechanisms and theassociated control electronics.Our standards in engineering,manufacturing, verification anddocumentation are incompliance with the demanding

rules postulated by theEuropean Space Agency ESA.

Up to the deployment, theboom segments are secured byspring loaded clamps, whichcan be opened by firing apyrotechnical rod cutter. Thedeployment is driven bycentrifugal forces only. Theboom hinges are equipped with

a redundant self-lockingmechanism, which is designedto guarantee a play-free andaccurate positioning of theboom after deployment.

The deployment is performedin two steps: The outersegments of both booms arereleased first. After successfullocking of the outer hinges, theclamps of the inner segmentsare opened to release thecomplete booms.

Deployment strategy

Qualification and verification

Scalable solutionsfor a variety of

applications

Like all S/C systems, the boomsfor Double Star had to pass aspecific qualification andverification programme. Allrequired facilities and equipmentfor alignment verification, thermalvacuum, vibration and

deployment testing are availablewithin the consortium. The deployment test with theDouble Star boom was carriedout on a spin table withcontrolled speed and gravitycompensation. To compare thedynamic behaviour with resultsfrom the deployment simulation,the mechanism was equippedwith accelerometers and thesignals recorded on a mobiledata acquisition system.

The design principle of theDouble Star boom can beadapted to a variety of spin-stabilized satellites, with spinrates from 5 ... 50 rpm.

A concept for an active, spring-driven deployment, usingredundant deployment springsat the hinges is available fornon-spinning satellites.Both versions can be realizedeither with one or two boomsegments. The length of thedeployed boom can beextended to more than fourmeters, depending on thedimensions of the spacecraftand on the mass to bedeployed.

A design concept for a multi-

segment boom with a deployedlength of up to ten meters isunder investigation.



Astro-und Feinwerktechnik

Adlershof GmbH

Albert-Einstein-Str.12D-12489 Berlin

phone.: +49 30 - 6392 1000fax: +49 30 - 6392 1002

Internet: www.astrofein.com

email: [email protected]

Gartenstraße 3D 86655 Harburg

phone.: +49(0) 9080-922054fax: +49 (0) 9080-922057


Carl-Scheele-Straße 14D-12489 Berlin

phone.: +49 30-6392 3932fax: +49 30-6392 3944

Internet: www.magson.de


IngenieurbüroMarkus Thiel

Simulation, Analysis,

Mechanical EngineeringMagnetische

Sondierungsgeräte

From ideas to systems -

teamwork

MAGSON GMBH develops,produces, and qualifieselectronic systems for spaceand aeronautics applications.

During the last ten years,Magson GmbH has taken theopportunity to prove its skillsand efficiency by hardwarecontributions to several spaceprojects. Focus of the develop-ment are magnetometers forscientific and attitude controlapplications.On behalf of leading researchinstitutes, instruments for theGerman small satellitesEquator- S and Bird, the MIRspace station, the ESA missionsMars Express, Venus Expressand Rosetta, the ChineseDouble Star mission as well asthe NASA mission Themis havebeen developed and manu-

factured. In close cooperationwith competent partners wedeliver instruments with fullspace qualification includingthermal- vacuum, vibration andEMC tests. Due to the ongoingminiaturization of instrumentsfor space missions the use of field programmable gate arrays- FPGA’s is be comming moreand more importand. In orderto implement complex digitalsystems in FPGA’s, IP cores fortelemetry interfaces, scalable

RISC processors and motorcontroller are avialable.

In 2001, Markus Thiel hasestablished a design andengineering office, inspired bythe idea of developing high-reliable mechanisms forscientific space projects.Markus Thiel has been workingas a mechanical engineer in thespace segment since 1993,

participating in projects suchas EQUATOR-S, StardustCIDA, and the ESA comet-mission ROSETTA. The preferred approach of Ingenieurbüro Thiel is toimplement simple and straight-forward working principles andto reduce the complexity of space systems whereverpossible in order to achieve amaximum in functional reliabilityat an affordable technologicaleffort.

As a partner of leading aero-space companies, we areparticipating in the develop-ment of mechanisms,instruments and subsystemsfor scientific satellites, usingcutting-edge 3D design andanalysis tools.Our key competences include

computer-based simulation,analysis and visualization of dynamic processes,

reliable technical solutions forspace tribology problems,

elaboration andimplementation of redundancyconcepts for space systems.We are prepared to meet themost demanding requirements.

Astro- und Feinwerktechnik Adlershof GmbHwas established in 1993, withan expert staff derived primarilyfrom members of the Institutefor Space Research at theformer German Academy of Sciences and its successorinstitute, the Berlin- Adlershof

center of the German Aerospace ResearchEstablishment (DLR).

Our field of operations includes:

Development and designwork

Design and prototype con-struction

Mechanical processing

Environment simulations

In space technology hardware,

we have specialized in thescientific payload area andespecially optoelectronicequipment.

Our expertise also extends to(electro-) mechanical hardwarefor small - scale satellites, suchas reaction wheels and solarpanels including operationalmechanisms.

We have additional extensiveexperience in OGSE andMGSE, such as developing and

producing transport containersand handling devices.

G r a f i k - F o t o - D e s i g n H

. +

U . R e u t e r , B e r l i n

GmbH

Zertifiziert

durch

DIN EN ISO

9001:2000Nr. 117853

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Deploy Able Booms