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GPC Y ASOCIADOS S.A.

Veléz Sarsfield 201640 Martinez

Buenos Aires

Tel.: +54 (9) 11 5993 8719

info@gpcasoc.com.ar

Horne Technologies cc

PO Box 536

Betty's Bay, 7141

Tel.: +27 (0)76 563 2084

info@hornet.cc

www.hornetechnologies.co.za

FAULHABER MINIMOTOR SA

Zona Artigianale 8, Madonna del Piano

6980 Croglio

Tel.: +41 (0)91 611 31 00

info@faulhaber.ch

Building of FAULHABER MICROMO LLC, Wien, Austria

FAULHABER MICROMO LLC

14881 Evergreen Avenue

Clearwater, FL 33762-3008

Tel.: +1 (727) 572 0131

marketing@micromo.com

www.faulhaberUSA.com

NRC Engineering & Precision Drives Co., Ltd.

17F., No. 890, Jingguo Rd., Luzhu Dist.

Taoyuan City 33858, Taiwan, R.O.C.

Tel.: +886 (0) 3-316-1838

info@nrc.com.tw

www.nrc-precidrives.com

EDEL Teknoloji Sistemleri Sanayi ve Ticaret Ltd.Şti

Folkart TowersAdalet Mah.Manas Blv. No:47B/2809

35530 Bayraklı/İzmir

Tel.: + 90 232 215 08 91

info@edelteknoloji.com

www.edelteknoloji.com

FAULHABER Asia Pacific Pte Ltd.

Blk 67 Ubi Road 1, #06-07 Oxley Bizhub

Singapore 408730

Tel.: +65 6562 8270

info@faulhaber.com.sg

Compotech Provider AP

Gustavslundsvägen 145, 4 tr

167 51 Bromma

Tel.: +46 (0) 8 441 58 00

info@compotech.se

www.compotech.se

MICROPRIVOD Ltd.

56 (bldg. 32), Shosse Enthusiastov

111123 Moscow

Tel.: +7 495 2214 052

info@microprivod.ru

www.microprivod.ru

FAULHABER Polska sp. z o.o.

Ul. Górki 7

60-204 Poznan

Tel.: +48 61 278 72 53

info@faulhaber.pl

FAULHABER Malaysia Sdn Bhd

1A-2-01 & 02 · One Precinct · Lengkok Mayang Pasir

11950 Bayan Baru · Penang · Malaysia

Tel.: +60 4 619 2570

info@faulhaber.my

Swiss Amiet Co., Ltd.

W-903, SK V1 Center, 11 Dangsan-ro 41-g

Yeongdeungpo-gu,07217, Seoul

Tel.: +82 (0) 2 783 4774

info@swissamiet.com

www.swissamiet.com

Shinkoh Electronics Co., Ltd.

Tokyo Sales Office, Motor Sales Division8F, REID-C OMORI building, 6-20-8

Minami-oi, Shinagawa-ku, Tokyo 140-0013

Tel.: +81 (0) 3 6404 1003

motor-info@shinkoh-elecs.co.jp

www.shinkoh-faulhaber.jp

FAULHABER Italia S.r.l.

Via Cavour 2

22074 Lomazzo CO

Tel.: +39 0236714708

info@faulhaber-italia.it

Inteltek Automation JV

S.No. 100/5, Ambegaon

Pune - 411046

Tel.: +91 (0) 20 39392150

info@inteltekindia.com

www.inteltekindia.com

Lewenstein Technologies Ltd.

1 Ha'arava St. Givat Shmuel

5400804 Israel

Tel.: +972 3 9780 800

info@l-tech.co.il

www.l-tech.co.il

Electro Mechanical Systems Ltd.

Eros House, Calleva Industrial Park, Aldermaston

Reading, RG7 8LN

Tel.: +44 (0) 118 9817 391

info@ems-ltd.com

www.ems-limited.co.uk

FAULHABER France SAS

Parc d’activités du Pas du Lac2, Rue Michaël Faraday

78180 Montigny-le-Bretonneux

Tel.: +33 (0) 1 30 80 45 00

info@faulhaber-france.fr

www.faulhaber.com

ELMEQ Motor

Passeig Ferrocarrils Catalans 178

Cornellà de Llobregat 08940 (Barcelona)

Tel.: +34 93 422 70 33

marketing@elmeq.es

www.elmeq.es

MOVETEC OY

Suokalliontie 9

01740 Vantaa

Tel.: +358 (0) 9 5259 230

info@movetec.fi

www.movetec.fi

Routech s.r.o.

Dr. Milady Horákové 185/66

460 06 Liberec

Tel.: +420 489 202 971

info@routech.cz

www.routech.cz

Compower ApS

Marielundvej 29

2730 Herlev

Tel.: +45 (0) 44 92 66 20

info@compower.dk

www.compower.dk

Marte Científica e Instrumentação Industrial Ltda

Av Fco Andrade Ribeiro 430

37540-000 Santa Rita do Sapucai, MG

Tel.: +55 (11) 3411 4500

motores@marte.com.br

www.marte.com.br

FAULHABER Drive System Technology (Taicang) Co., Ltd.

Eastern Block, Incubator Building, No. 6 Beijing Road West

Taicang 215400, Jiangsu Province

Tel.: +86 (0) 512 5337 2626

info@faulhaber.cn

FAULHABER Benelux B.V.

High Tech Campus 9

5656 AE Eindhoven

Tel.: +31 (0) 40 85155-40

info@faulhaber.nl

FAULHABER Austria GmbH

Modecenterstraße 22/C89

1030 Wien

Tel.: +43 1 7963149-0

info@faulhaber-austria.at

ERNTEC Pty. Ltd.

15 Koornang Road

Scoresby, VIC 3179

Tel.: +61 3 9756 4000

Fax: +61 3 9753 4000

sales@erntec.net

www.erntec.net

Headquarter

DR. FRITZ FAULHABER GMBH & CO. KG

Daimlerstr. 23

71101 Schönaich

Tel.: +49 7031 638 0

Fax: +49 7031 638 100

info@faulhaber.de

www.faulhaber.com

FAULHABER is not represented in this country

Info@faulhaber.com

Jan-Christopher Mohr

Area Sales Manager

Tel.: +49 (7031) 638 158

jan-christopher.mohr@faulhaber.de

Michael Schütte

Area Sales Manager

Tel.: +49 (7031) 638 456

michael.schuette@faulhaber.de

Daniel Brönnimann

Area Sales Manager

Tel.: +41 (0) 79 570 0814

daniel.broennimann@faulhaber.ch

Rolf Leitner

Regional Sales Manager

Tel.: +41 (0) 79 422 3348

rolf.leitner@faulhaber.ch

Rafael Steinemann

Area Sales Manager

Tel.: +41 (0) 79 932 1645

rafael.steinemann@faulhaber.ch

Linear motor for Space Hades capsule header

In 1969 Neil Armstrong and Buzz Aldrin were the first people to step foot on the moon. Their lunar landing mission was the first space mission during which samples were collected on a celestial body and brought back to Earth. Even today, scientists continue to evaluate and make new discoveries from the material. Manned space travel is, however, too expensive and complicated for collecting cosmic rocks. Since Apollo 11, it has above all been unmanned probes that have collected substances from celestial bodies.

Linear motor for Space Hades capsule rocket trajectory

Stardust by the gramme

While the famous astronauts brought back moon rock by the hundredweight, the unmanned missions generally make do with just a few grams of the cosmic material. Thanks to modern analysis methods, even the smallest quantities are sufficient for in-depth research. It helps the scientists to better understand the processes that occurred during the formation of our solar system. Moreover, the amino acid glycine was also detected in such samples. It follows that this protein building block landed on Earth with meteorites and probably contributed to the origin of life on our planet.

Before the samples can be examined, they must, of course, first be returned to Earth. To accomplish this, return capsules are used on the unmanned missions. They are released from the space probe at a precisely calculated moment and sent on their way with a small push. The Earth's gravitational pull eventually forces them to land in what is a precalculated area.

Like all objects that enter the Earth's atmosphere from space, the capsule becomes extremely hot in contact with the atmosphere. To counter this reaction, it is effectively protected by its round-oval shape and a heat shield. An especially critical phase of the return begins a brief time later after it has already been significantly slowed down by the air resistance and moves at "only" subsonic speed.

Linear motor for Space Hades capsule Nosecone rocket
Peak values with components The small size of the rocket permits only a limited payload. All components must therefore be optimized with respect to size and weight for the limited available space in the rocket nosecone.

Danger from aerodynamics

During this part of its flight, the capsule is already exposed to the terrestrial aerodynamics. Every air eddy affects its trajectory and its orientation. Without wings and flaps, there is no way to stabilize from the outside. There is a risk that the capsule could begin to spin. This occurred, for example, with the return capsule of NASA's Genesis Mission in 2004. During this phase of the flight, it lost its intended orientation and it could not release the parachute and crashed unchecked into the ground.

“We want to prevent this scenario by stabilizing the orientation of the capsule during its flight through the atmosphere,” explains Aurélien Walpen from the University of Applied Sciences Western Switzerland (HES-SO), which has campuses in Geneva and Fribourg. He was involved with the HADES project there as a master's student. “One of our professors is very active in the area of space travel and confronted us with the problem of the return capsule. We played through various concepts but soon returned to our initial idea: stabilization though center-of-gravity displacement.” The capsule should, in principle, do the same thing as a surfer when he holds onto his board while riding a wave: He compensates for the effect of his dynamic “ground” by using his bodyweight to constantly adjust his center of gravity. “Translated into the language of mechanics, the compensating movement takes place on the x and y axis. By shifting a weight back and forth on both of these axes, it is possible to compensate for external destabilizing forces.”

Linear motor for Space Hades capsule outside
Linear motor for Space Hades capsule inside
Inside of the HADES capsule showing one of the FAULHABER Linear Servomotor used to stabilize the capsule
Linear motor for Space Hades capsule Rexus

Motors with double function

It made sense to use linear DC servo motors inside the capsule to move the two weights. Conveniently, the motor mass is sufficient in this case to function as a counterweight: The stabilizing effect is achieved by the two motors darting back and forth along their axes. Adding additional dead weight is not necessary. While searching for reliable solutions with linear motors for this task, experts from ESA and HADES turned to the solutions offered by FAULHABER. They were able to find a suitable drive in the portfolio based on the physical requirements for the unusual task. These are considerable. First, they must be relatively robust to withstand the enormous forces during rocket launch and upon re-entry into the atmosphere. Especially during the latter, it becomes very hot in the capsule – this after having been exposed to the extremely low temperatures in space and the vacuum present there.

All of this must not prevent the motors from performing their tasks reliably and quickly. They must be able to move back and forth along their axis of motion up to four times per second. To do this, they need a very high torque, as they must be able to work against significant braking and centrifugal forces. At the same time, the space within the capsule – as is always the case in space travel – is a very scarce commodity. The motor must supply maximum performance with the smallest of dimensions.

“We tried various types here as well, only to ultimately return to our first choice,” explains Aurélien Walpen. “The LM 2070-12 linear DC servo motors from FAULHABER achieved the best values in all important points and proved itself to be the most reliable drive. It was also important that the motor control can be very easily programmed and integrated in the complete system.” The entire system was tested in climatic and vacuum chambers as well as in the wind tunnel at the university in Geneva. There, the reaction of the capsule to the air resistance during the flight through the atmosphere was simulated. During the tests, the linear motors reliably stabilized the orientation of the capsule. The field test with actual return from space that was planned for March 2020 had to be postponed. Now it is scheduled to take place in spring 2021. The capsule will be launched by a REXUS rocket from the Esrange Space Centre in the northern Swedish town of Kiruna. After accelerating to 20 G and reaching a top speed of 4,300 kilometers per hour it will travel to an altitude of 100 kilometres above the Earth's surface from where the capsule will be dropped and thanks to FAULHABER it will return safely.

Linear DC-Servomotors
LM 2070 ... 12
for sin/cos control
Data sheet (PDF)
Key Features
Length:
33 ... 85.5 mm
Wide:
8 ... 20 mm
Stroke length:
15 ... 220 mm
Speed:
1.8 ... 3.4 m/s
Continuous force:
1.03 ... 9.2 N
Product details

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